7-Day Forecast Summary
7-Day Detailed Weather Forecast for Diamond Bar
Today |
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Temperature: 85°F Wind Speed: 5 to 10 mph Wind Direction: SW Forecast: Sunny, with a high near 85. Southwest wind 5 to 10 mph. |
Tonight |
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Temperature: 58°F Wind Speed: 0 to 5 mph Wind Direction: S Forecast: Mostly clear, with a low around 58. South wind 0 to 5 mph. |
Tuesday |
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Temperature: 81°F Wind Speed: 0 to 10 mph Wind Direction: S Forecast: Sunny, with a high near 81. South wind 0 to 10 mph. |
Tuesday Night |
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Temperature: 58°F Wind Speed: 0 to 5 mph Wind Direction: SSW Forecast: Partly cloudy, with a low around 58. South southwest wind 0 to 5 mph. |
Wednesday |
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Temperature: 72°F Wind Speed: 5 mph Wind Direction: S Forecast: A chance of rain showers between 11am and 5pm, then showers and thunderstorms. Partly sunny, with a high near 72. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible. |
Wednesday Night |
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Temperature: 55°F Wind Speed: 0 to 5 mph Wind Direction: S Forecast: Showers and thunderstorms. Cloudy, with a low around 55. Chance of precipitation is 90%. |
Thursday |
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Temperature: 66°F Wind Speed: 0 to 5 mph Wind Direction: SSW Forecast: Showers and thunderstorms. Partly sunny, with a high near 66. |
Thursday Night |
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Temperature: 53°F Wind Speed: 0 to 5 mph Wind Direction: SE Forecast: A slight chance of rain showers before 11pm. Mostly clear, with a low around 53. |
Friday |
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Temperature: 71°F Wind Speed: 0 to 5 mph Wind Direction: WNW Forecast: Sunny, with a high near 71. |
Friday Night |
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Temperature: 54°F Wind Speed: 0 to 10 mph Wind Direction: N Forecast: Clear, with a low around 54. |
Saturday |
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Temperature: 77°F Wind Speed: 0 to 10 mph Wind Direction: NNE Forecast: Sunny, with a high near 77. |
Saturday Night |
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Temperature: 56°F Wind Speed: 0 to 15 mph Wind Direction: NNE Forecast: Mostly clear, with a low around 56. |
Sunday |
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Temperature: 79°F Wind Speed: 0 to 10 mph Wind Direction: NNE Forecast: Sunny, with a high near 79. |
Sunday Night |
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Temperature: 57°F Wind Speed: 0 to 15 mph Wind Direction: N Forecast: Mostly clear, with a low around 57. |

