United States Rancho Cucamonga, California
Long Range Weather Forecast

Helping You Avoid Bad Weather. 30 days and beyond.

Rancho Cucamonga, August 2025 Weather Forecast: A Day-by-Day Calendar View Rancho Cucamonga Weather Outlook: Detailed August 2025 Calendar Sun Mon Tue Wed Thu Fri Sat 1 90°F 57°F 32°C 14°C 05% Rancho Cucamonga weather forecast for Aug 1, 2025: 5% Rain Chance, Highs/Lows 90°F to ?90°F Rancho Cucamonga weather forecast for Aug 1, 2025: 5% Rain Chance, Highs/Lows 32°C to ?32°C 2 90°F 58°F 32°C 14°C 05% Rancho Cucamonga weather forecast for Aug 2, 2025: 5% Rain Chance, Highs/Lows 90°F to ?90°F Rancho Cucamonga weather forecast for Aug 2, 2025: 5% Rain Chance, Highs/Lows 32°C to ?32°C 3 89°F 58°F 32°C 14°C 06% Rancho Cucamonga weather forecast for Aug 3, 2025: 6% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 3, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 4 91°F 57°F 33°C 14°C 06% Rancho Cucamonga weather forecast for Aug 4, 2025: 6% Rain Chance, Highs/Lows 91°F to ?91°F Rancho Cucamonga weather forecast for Aug 4, 2025: 6% Rain Chance, Highs/Lows 33°C to ?33°C 5 91°F 58°F 33°C 14°C 06% Rancho Cucamonga weather forecast for Aug 5, 2025: 6% Rain Chance, Highs/Lows 91°F to ?91°F Rancho Cucamonga weather forecast for Aug 5, 2025: 6% Rain Chance, Highs/Lows 33°C to ?33°C 6 90°F 58°F 32°C 14°C 11% Rancho Cucamonga weather forecast for Aug 6, 2025: 11% Rain Chance, Highs/Lows 90°F to ?90°F Rancho Cucamonga weather forecast for Aug 6, 2025: 11% Rain Chance, Highs/Lows 32°C to ?32°C 7 88°F 56°F 31°C 13°C 06% Rancho Cucamonga weather forecast for Aug 7, 2025: 6% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 7, 2025: 6% Rain Chance, Highs/Lows 31°C to ?31°C 8 87°F 55°F 31°C 13°C 06% Rancho Cucamonga weather forecast for Aug 8, 2025: 6% Rain Chance, Highs/Lows 87°F to ?87°F Rancho Cucamonga weather forecast for Aug 8, 2025: 6% Rain Chance, Highs/Lows 31°C to ?31°C 9 88°F 57°F 31°C 14°C 04% Rancho Cucamonga weather forecast for Aug 9, 2025: 4% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 9, 2025: 4% Rain Chance, Highs/Lows 31°C to ?31°C 10 88°F 56°F 31°C 13°C 05% Rancho Cucamonga weather forecast for Aug 10, 2025: 5% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 10, 2025: 5% Rain Chance, Highs/Lows 31°C to ?31°C 11 89°F 55°F 32°C 13°C 05% Rancho Cucamonga weather forecast for Aug 11, 2025: 5% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 11, 2025: 5% Rain Chance, Highs/Lows 32°C to ?32°C 12 89°F 55°F 32°C 13°C 04% Rancho Cucamonga weather forecast for Aug 12, 2025: 4% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 12, 2025: 4% Rain Chance, Highs/Lows 32°C to ?32°C 13 90°F 57°F 32°C 14°C 06% Rancho Cucamonga weather forecast for Aug 13, 2025: 6% Rain Chance, Highs/Lows 90°F to ?90°F Rancho Cucamonga weather forecast for Aug 13, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 14 91°F 56°F 33°C 13°C 04% Rancho Cucamonga weather forecast for Aug 14, 2025: 4% Rain Chance, Highs/Lows 91°F to ?91°F Rancho Cucamonga weather forecast for Aug 14, 2025: 4% Rain Chance, Highs/Lows 33°C to ?33°C 15 93°F 57°F 34°C 14°C 06% Rancho Cucamonga weather forecast for Aug 15, 2025: 6% Rain Chance, Highs/Lows 93°F to ?93°F Rancho Cucamonga weather forecast for Aug 15, 2025: 6% Rain Chance, Highs/Lows 34°C to ?34°C 16 93°F 58°F 34°C 14°C 11% Rancho Cucamonga weather forecast for Aug 16, 2025: 11% Rain Chance, Highs/Lows 93°F to ?93°F Rancho Cucamonga weather forecast for Aug 16, 2025: 11% Rain Chance, Highs/Lows 34°C to ?34°C 17 94°F 59°F 34°C 15°C 27% Rancho Cucamonga weather forecast for Aug 17, 2025: 27% Rain Chance, Highs/Lows 94°F to ?94°F Rancho Cucamonga weather forecast for Aug 17, 2025: 27% Rain Chance, Highs/Lows 34°C to ?34°C 18 94°F 60°F 34°C 16°C 06% Rancho Cucamonga weather forecast for Aug 18, 2025: 6% Rain Chance, Highs/Lows 94°F to ?94°F Rancho Cucamonga weather forecast for Aug 18, 2025: 6% Rain Chance, Highs/Lows 34°C to ?34°C 19 95°F 62°F 35°C 17°C 06% Rancho Cucamonga weather forecast for Aug 19, 2025: 6% Rain Chance, Highs/Lows 95°F to ?95°F Rancho Cucamonga weather forecast for Aug 19, 2025: 6% Rain Chance, Highs/Lows 35°C to ?35°C 20 91°F 61°F 33°C 16°C 26% Rancho Cucamonga weather forecast for Aug 20, 2025: 26% Rain Chance, Highs/Lows 91°F to ?91°F Rancho Cucamonga weather forecast for Aug 20, 2025: 26% Rain Chance, Highs/Lows 33°C to ?33°C 21 88°F 58°F 31°C 14°C 11% Rancho Cucamonga weather forecast for Aug 21, 2025: 11% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 21, 2025: 11% Rain Chance, Highs/Lows 31°C to ?31°C 22 87°F 57°F 31°C 14°C 06% Rancho Cucamonga weather forecast for Aug 22, 2025: 6% Rain Chance, Highs/Lows 87°F to ?87°F Rancho Cucamonga weather forecast for Aug 22, 2025: 6% Rain Chance, Highs/Lows 31°C to ?31°C 23 88°F 57°F 31°C 14°C 04% Rancho Cucamonga weather forecast for Aug 23, 2025: 4% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 23, 2025: 4% Rain Chance, Highs/Lows 31°C to ?31°C 24 89°F 56°F 32°C 13°C 18% Rancho Cucamonga weather forecast for Aug 24, 2025: 18% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 24, 2025: 18% Rain Chance, Highs/Lows 32°C to ?32°C 25 89°F 55°F 32°C 13°C 06% Rancho Cucamonga weather forecast for Aug 25, 2025: 6% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 25, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 26 90°F 56°F 32°C 13°C 06% Rancho Cucamonga weather forecast for Aug 26, 2025: 6% Rain Chance, Highs/Lows 90°F to ?90°F Rancho Cucamonga weather forecast for Aug 26, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 27 89°F 55°F 32°C 13°C 06% Rancho Cucamonga weather forecast for Aug 27, 2025: 6% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 27, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 28 89°F 54°F 32°C 12°C 06% Rancho Cucamonga weather forecast for Aug 28, 2025: 6% Rain Chance, Highs/Lows 89°F to ?89°F Rancho Cucamonga weather forecast for Aug 28, 2025: 6% Rain Chance, Highs/Lows 32°C to ?32°C 29 87°F 53°F 31°C 12°C 04% Rancho Cucamonga weather forecast for Aug 29, 2025: 4% Rain Chance, Highs/Lows 87°F to ?87°F Rancho Cucamonga weather forecast for Aug 29, 2025: 4% Rain Chance, Highs/Lows 31°C to ?31°C 30 88°F 54°F 31°C 12°C 06% Rancho Cucamonga weather forecast for Aug 30, 2025: 6% Rain Chance, Highs/Lows 88°F to ?88°F Rancho Cucamonga weather forecast for Aug 30, 2025: 6% Rain Chance, Highs/Lows 31°C to ?31°C 31 87°F 55°F 31°C 13°C 19% Rancho Cucamonga weather forecast for Aug 31, 2025: 19% Rain Chance, Highs/Lows 87°F to ?87°F Rancho Cucamonga weather forecast for Aug 31, 2025: 19% Rain Chance, Highs/Lows 31°C to ?31°C

Weather Forecast Legend

WeatherTAB helps you plan activities on days with the least risk of rain.
Low risk of rain/snow.
Transition Day – Start or End of a Risky Period
Medium risk of rain/snow.
High risk of rain/snow.
%
Forecast risk of rain/snow.
Rancho Cucamonga Weather Forecast for Aug 2025 - Risk of Rain Graph ) Rancho Cucamonga Weather Forecast for Aug 2025 - Risk of Rain Graph 90 80 70 60 50 40 30 20 10 Aug 1: Precipitation Risk Forecast - 05% risk of rain/snow. /n1 F Aug 2: Precipitation Risk Forecast - 05% risk of rain/snow. /n2 S Aug 3: Precipitation Risk Forecast - 06% risk of rain/snow. /n3 Sn Aug 4: Precipitation Risk Forecast - 06% risk of rain/snow. /n4 M Aug 5: Precipitation Risk Forecast - 06% risk of rain/snow. /n5 T Aug 6: Precipitation Risk Forecast - 11% risk of rain/snow. /n6 W Aug 7: Precipitation Risk Forecast - 06% risk of rain/snow. /n7 Th Aug 8: Precipitation Risk Forecast - 06% risk of rain/snow. /n8 F Aug 9: Precipitation Risk Forecast - 04% risk of rain/snow. /n9 S Aug 10: Precipitation Risk Forecast - 05% risk of rain/snow. /n10 Sn Aug 11: Precipitation Risk Forecast - 05% risk of rain/snow. /n11 M Aug 12: Precipitation Risk Forecast - 04% risk of rain/snow. /n12 T Aug 13: Precipitation Risk Forecast - 06% risk of rain/snow. /n13 W Aug 14: Precipitation Risk Forecast - 04% risk of rain/snow. /n14 Th Aug 15: Precipitation Risk Forecast - 06% risk of rain/snow. /n15 F Aug 16: Precipitation Risk Forecast - 11% risk of rain/snow. /n16 S Aug 17: Precipitation Risk Forecast - 27% risk of rain/snow. /n17 Sn Aug 18: Precipitation Risk Forecast - 06% risk of rain/snow. /n18 M Aug 19: Precipitation Risk Forecast - 06% risk of rain/snow. /n19 T Aug 20: Precipitation Risk Forecast - 26% risk of rain/snow. /n20 W Aug 21: Precipitation Risk Forecast - 11% risk of rain/snow. /n21 Th Aug 22: Precipitation Risk Forecast - 06% risk of rain/snow. /n22 F Aug 23: Precipitation Risk Forecast - 04% risk of rain/snow. /n23 S Aug 24: Precipitation Risk Forecast - 18% risk of rain/snow. /n24 Sn Aug 25: Precipitation Risk Forecast - 06% risk of rain/snow. /n25 M Aug 26: Precipitation Risk Forecast - 06% risk of rain/snow. /n26 T Aug 27: Precipitation Risk Forecast - 06% risk of rain/snow. /n27 W Aug 28: Precipitation Risk Forecast - 06% risk of rain/snow. /n28 Th Aug 29: Precipitation Risk Forecast - 04% risk of rain/snow. /n29 F Aug 30: Precipitation Risk Forecast - 06% risk of rain/snow. /n30 S Aug 31: Precipitation Risk Forecast - 19% risk of rain/snow. /n31 Sn

Rain Risk Graph: Monthly Overview. Bar heights indicate rain risk percentages. Yellow bars mark low-risk days, while black and grey bars signal higher risks. Grey-yellow bars act as buffers, advising to keep at least one day clear from the riskier grey and black days, guiding safer outdoor planning. Note: This graph suggests potential risk, not guaranteed rainfall; expect most rain, if any, on days marked in grey and black.

Rancho Cucamonga, Aug 2025: Daily High Temperature Forecast Rancho Cucamonga High Temperature Trends for August 2025 92 29 91 29 90 29 89 29 88 29 87 29 86 29 85 29 84 29 Rancho Cucamonga, Aug 1: High Temp of 90°F /nRancho Cucamonga, Aug 1: High Temp of ?°C /n1 F Rancho Cucamonga, Aug 2: High Temp of 90°F /nRancho Cucamonga, Aug 2: High Temp of ?°C /n2 S Rancho Cucamonga, Aug 3: High Temp of 89°F /nRancho Cucamonga, Aug 3: High Temp of ?°C /n3 Sn Rancho Cucamonga, Aug 4: High Temp of 91°F /nRancho Cucamonga, Aug 4: High Temp of ?°C /n4 M Rancho Cucamonga, Aug 5: High Temp of 91°F /nRancho Cucamonga, Aug 5: High Temp of ?°C /n5 T Rancho Cucamonga, Aug 6: High Temp of 90°F /nRancho Cucamonga, Aug 6: High Temp of ?°C /n6 W Rancho Cucamonga, Aug 7: High Temp of 88°F /nRancho Cucamonga, Aug 7: High Temp of ?°C /n7 Th Rancho Cucamonga, Aug 8: High Temp of 87°F /nRancho Cucamonga, Aug 8: High Temp of ?°C /n8 F Rancho Cucamonga, Aug 9: High Temp of 88°F /nRancho Cucamonga, Aug 9: High Temp of ?°C /n9 S Rancho Cucamonga, Aug 10: High Temp of 88°F /nRancho Cucamonga, Aug 10: High Temp of ?°C /n10 Sn Rancho Cucamonga, Aug 11: High Temp of 89°F /nRancho Cucamonga, Aug 11: High Temp of ?°C /n11 M Rancho Cucamonga, Aug 12: High Temp of 89°F /nRancho Cucamonga, Aug 12: High Temp of ?°C /n12 T Rancho Cucamonga, Aug 13: High Temp of 90°F /nRancho Cucamonga, Aug 13: High Temp of ?°C /n13 W Rancho Cucamonga, Aug 14: High Temp of 91°F /nRancho Cucamonga, Aug 14: High Temp of ?°C /n14 Th Rancho Cucamonga, Aug 15: High Temp of 93°F /nRancho Cucamonga, Aug 15: High Temp of ?°C /n15 F Rancho Cucamonga, Aug 16: High Temp of 93°F /nRancho Cucamonga, Aug 16: High Temp of ?°C /n16 S Rancho Cucamonga, Aug 17: High Temp of 94°F /nRancho Cucamonga, Aug 17: High Temp of ?°C /n17 Sn Rancho Cucamonga, Aug 18: High Temp of 94°F /nRancho Cucamonga, Aug 18: High Temp of ?°C /n18 M Rancho Cucamonga, Aug 19: High Temp of 95°F /nRancho Cucamonga, Aug 19: High Temp of ?°C /n19 T Rancho Cucamonga, Aug 20: High Temp of 91°F /nRancho Cucamonga, Aug 20: High Temp of ?°C /n20 W Rancho Cucamonga, Aug 21: High Temp of 88°F /nRancho Cucamonga, Aug 21: High Temp of ?°C /n21 Th Rancho Cucamonga, Aug 22: High Temp of 87°F /nRancho Cucamonga, Aug 22: High Temp of ?°C /n22 F Rancho Cucamonga, Aug 23: High Temp of 88°F /nRancho Cucamonga, Aug 23: High Temp of ?°C /n23 S Rancho Cucamonga, Aug 24: High Temp of 89°F /nRancho Cucamonga, Aug 24: High Temp of ?°C /n24 Sn Rancho Cucamonga, Aug 25: High Temp of 89°F /nRancho Cucamonga, Aug 25: High Temp of ?°C /n25 M Rancho Cucamonga, Aug 26: High Temp of 90°F /nRancho Cucamonga, Aug 26: High Temp of ?°C /n26 T Rancho Cucamonga, Aug 27: High Temp of 89°F /nRancho Cucamonga, Aug 27: High Temp of ?°C /n27 W Rancho Cucamonga, Aug 28: High Temp of 89°F /nRancho Cucamonga, Aug 28: High Temp of ?°C /n28 Th Rancho Cucamonga, Aug 29: High Temp of 87°F /nRancho Cucamonga, Aug 29: High Temp of ?°C /n29 F Rancho Cucamonga, Aug 30: High Temp of 88°F /nRancho Cucamonga, Aug 30: High Temp of ?°C /n30 S Rancho Cucamonga, Aug 31: High Temp of 87°F /nRancho Cucamonga, Aug 31: High Temp of ?°C /n31 Sn

High Temperature Graph: Tracks daily forecasted highs. Vertical bars on each day highlight forecast variability, emphasizing trend analysis over precise predictions.

Rancho Cucamonga, Aug 2025: Daily Average Temperature Forecast Rancho Cucamonga Average Temperature Trends for August 2025 75 28 74 27 73 26 72 25 71 24 70 23 69 22 68 21 67 20 Rancho Cucamonga, Aug 1: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 1: Forecasted Average Temp of 23°C /n1 F Rancho Cucamonga, Aug 2: Forecasted Average Temp of 74°F /nRancho Cucamonga, Aug 2: Forecasted Average Temp of 23°C /n2 S Rancho Cucamonga, Aug 3: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 3: Forecasted Average Temp of 23°C /n3 Sn Rancho Cucamonga, Aug 4: Forecasted Average Temp of 74°F /nRancho Cucamonga, Aug 4: Forecasted Average Temp of 23°C /n4 M Rancho Cucamonga, Aug 5: Forecasted Average Temp of 74°F /nRancho Cucamonga, Aug 5: Forecasted Average Temp of 23°C /n5 T Rancho Cucamonga, Aug 6: Forecasted Average Temp of 74°F /nRancho Cucamonga, Aug 6: Forecasted Average Temp of 23°C /n6 W Rancho Cucamonga, Aug 7: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 7: Forecasted Average Temp of 22°C /n7 Th Rancho Cucamonga, Aug 8: Forecasted Average Temp of 71°F /nRancho Cucamonga, Aug 8: Forecasted Average Temp of 22°C /n8 F Rancho Cucamonga, Aug 9: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 9: Forecasted Average Temp of 22°C /n9 S Rancho Cucamonga, Aug 10: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 10: Forecasted Average Temp of 22°C /n10 Sn Rancho Cucamonga, Aug 11: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 11: Forecasted Average Temp of 22°C /n11 M Rancho Cucamonga, Aug 12: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 12: Forecasted Average Temp of 22°C /n12 T Rancho Cucamonga, Aug 13: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 13: Forecasted Average Temp of 23°C /n13 W Rancho Cucamonga, Aug 14: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 14: Forecasted Average Temp of 23°C /n14 Th Rancho Cucamonga, Aug 15: Forecasted Average Temp of 75°F /nRancho Cucamonga, Aug 15: Forecasted Average Temp of 24°C /n15 F Rancho Cucamonga, Aug 16: Forecasted Average Temp of 75°F /nRancho Cucamonga, Aug 16: Forecasted Average Temp of 24°C /n16 S Rancho Cucamonga, Aug 17: Forecasted Average Temp of 76°F /nRancho Cucamonga, Aug 17: Forecasted Average Temp of 24°C /n17 Sn Rancho Cucamonga, Aug 18: Forecasted Average Temp of 77°F /nRancho Cucamonga, Aug 18: Forecasted Average Temp of 25°C /n18 M Rancho Cucamonga, Aug 19: Forecasted Average Temp of 78°F /nRancho Cucamonga, Aug 19: Forecasted Average Temp of 26°C /n19 T Rancho Cucamonga, Aug 20: Forecasted Average Temp of 76°F /nRancho Cucamonga, Aug 20: Forecasted Average Temp of 24°C /n20 W Rancho Cucamonga, Aug 21: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 21: Forecasted Average Temp of 22°C /n21 Th Rancho Cucamonga, Aug 22: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 22: Forecasted Average Temp of 22°C /n22 F Rancho Cucamonga, Aug 23: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 23: Forecasted Average Temp of 22°C /n23 S Rancho Cucamonga, Aug 24: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 24: Forecasted Average Temp of 22°C /n24 Sn Rancho Cucamonga, Aug 25: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 25: Forecasted Average Temp of 22°C /n25 M Rancho Cucamonga, Aug 26: Forecasted Average Temp of 73°F /nRancho Cucamonga, Aug 26: Forecasted Average Temp of 22°C /n26 T Rancho Cucamonga, Aug 27: Forecasted Average Temp of 72°F /nRancho Cucamonga, Aug 27: Forecasted Average Temp of 22°C /n27 W Rancho Cucamonga, Aug 28: Forecasted Average Temp of 71°F /nRancho Cucamonga, Aug 28: Forecasted Average Temp of 22°C /n28 Th Rancho Cucamonga, Aug 29: Forecasted Average Temp of 70°F /nRancho Cucamonga, Aug 29: Forecasted Average Temp of 21°C /n29 F Rancho Cucamonga, Aug 30: Forecasted Average Temp of 71°F /nRancho Cucamonga, Aug 30: Forecasted Average Temp of 21°C /n30 S Rancho Cucamonga, Aug 31: Forecasted Average Temp of 71°F /nRancho Cucamonga, Aug 31: Forecasted Average Temp of 22°C /n31 Sn

Average Temperature Graph: Illustrates daily average temperatures. Each point's vertical bar underscores the forecast's potential fluctuation, encouraging trend recognition throughout the month.

Rancho Cucamonga, Aug 2025: Daily Low Temperature Forecast Rancho Cucamonga Low Temperature Trends for August 2025 58 19 57 18 56 17 55 16 54 15 53 14 52 13 51 12 50 11 Rancho Cucamonga, August 1: Low Temp of 57°F /nRancho Cucamonga, August 1: Low Temp of 14°C /n1 F Rancho Cucamonga, August 2: Low Temp of 58°F /nRancho Cucamonga, August 2: Low Temp of 14°C /n2 S Rancho Cucamonga, August 3: Low Temp of 58°F /nRancho Cucamonga, August 3: Low Temp of 14°C /n3 Sn Rancho Cucamonga, August 4: Low Temp of 57°F /nRancho Cucamonga, August 4: Low Temp of 14°C /n4 M Rancho Cucamonga, August 5: Low Temp of 58°F /nRancho Cucamonga, August 5: Low Temp of 14°C /n5 T Rancho Cucamonga, August 6: Low Temp of 58°F /nRancho Cucamonga, August 6: Low Temp of 14°C /n6 W Rancho Cucamonga, August 7: Low Temp of 56°F /nRancho Cucamonga, August 7: Low Temp of 13°C /n7 Th Rancho Cucamonga, August 8: Low Temp of 55°F /nRancho Cucamonga, August 8: Low Temp of 13°C /n8 F Rancho Cucamonga, August 9: Low Temp of 57°F /nRancho Cucamonga, August 9: Low Temp of 14°C /n9 S Rancho Cucamonga, August 10: Low Temp of 56°F /nRancho Cucamonga, August 10: Low Temp of 13°C /n10 Sn Rancho Cucamonga, August 11: Low Temp of 55°F /nRancho Cucamonga, August 11: Low Temp of 13°C /n11 M Rancho Cucamonga, August 12: Low Temp of 55°F /nRancho Cucamonga, August 12: Low Temp of 13°C /n12 T Rancho Cucamonga, August 13: Low Temp of 57°F /nRancho Cucamonga, August 13: Low Temp of 14°C /n13 W Rancho Cucamonga, August 14: Low Temp of 56°F /nRancho Cucamonga, August 14: Low Temp of 13°C /n14 Th Rancho Cucamonga, August 15: Low Temp of 57°F /nRancho Cucamonga, August 15: Low Temp of 14°C /n15 F Rancho Cucamonga, August 16: Low Temp of 58°F /nRancho Cucamonga, August 16: Low Temp of 14°C /n16 S Rancho Cucamonga, August 17: Low Temp of 59°F /nRancho Cucamonga, August 17: Low Temp of 15°C /n17 Sn Rancho Cucamonga, August 18: Low Temp of 60°F /nRancho Cucamonga, August 18: Low Temp of 16°C /n18 M Rancho Cucamonga, August 19: Low Temp of 62°F /nRancho Cucamonga, August 19: Low Temp of 17°C /n19 T Rancho Cucamonga, August 20: Low Temp of 61°F /nRancho Cucamonga, August 20: Low Temp of 16°C /n20 W Rancho Cucamonga, August 21: Low Temp of 58°F /nRancho Cucamonga, August 21: Low Temp of 14°C /n21 Th Rancho Cucamonga, August 22: Low Temp of 57°F /nRancho Cucamonga, August 22: Low Temp of 14°C /n22 F Rancho Cucamonga, August 23: Low Temp of 57°F /nRancho Cucamonga, August 23: Low Temp of 14°C /n23 S Rancho Cucamonga, August 24: Low Temp of 56°F /nRancho Cucamonga, August 24: Low Temp of 13°C /n24 Sn Rancho Cucamonga, August 25: Low Temp of 55°F /nRancho Cucamonga, August 25: Low Temp of 13°C /n25 M Rancho Cucamonga, August 26: Low Temp of 56°F /nRancho Cucamonga, August 26: Low Temp of 13°C /n26 T Rancho Cucamonga, August 27: Low Temp of 55°F /nRancho Cucamonga, August 27: Low Temp of 13°C /n27 W Rancho Cucamonga, August 28: Low Temp of 54°F /nRancho Cucamonga, August 28: Low Temp of 12°C /n28 Th Rancho Cucamonga, August 29: Low Temp of 53°F /nRancho Cucamonga, August 29: Low Temp of 12°C /n29 F Rancho Cucamonga, August 30: Low Temp of 54°F /nRancho Cucamonga, August 30: Low Temp of 12°C /n30 S Rancho Cucamonga, August 31: Low Temp of 55°F /nRancho Cucamonga, August 31: Low Temp of 13°C /n31 Sn

Low Temperature Graph: Displays daily forecasted lows. Vertical rectangles on each plot point indicate forecast uncertainty, aiding in identifying temperature trends rather than exact figures.

August 2025 Summary

Precipitation Forecast
Average Precipitation
Rain Frequency 0 - 2 days
Temperature Forecast
Temperature Forecast Normal
Avg High Temps
Avg Low Temps