7-Day Forecast Summary
7-Day Detailed Weather Forecast for Collinsville
This Afternoon |
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Temperature: 99°F Wind Speed: 5 to 10 mph Wind Direction: ESE Forecast: Sunny, with a high near 99. Heat index values as high as 103. East southeast wind 5 to 10 mph. |
Tonight |
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Temperature: 75°F Wind Speed: 5 to 10 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms after 4am. Mostly clear. Low around 75, with temperatures rising to around 77 overnight. Heat index values as high as 101. Southeast wind 5 to 10 mph. |
Thursday |
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Temperature: 96°F Wind Speed: 5 to 15 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 96. Heat index values as high as 103. Southeast wind 5 to 15 mph. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 75°F Wind Speed: 5 to 15 mph Wind Direction: SSE Forecast: A slight chance of showers and thunderstorms. Mostly clear. Low around 75, with temperatures rising to around 77 overnight. Heat index values as high as 100. South southeast wind 5 to 15 mph. Chance of precipitation is 20%. |
Friday |
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Temperature: 97°F Wind Speed: 5 to 10 mph Wind Direction: SSE Forecast: A slight chance of rain showers before 7am. Mostly sunny, with a high near 97. South southeast wind 5 to 10 mph. Chance of precipitation is 20%. |
Friday Night |
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Temperature: 74°F Wind Speed: 5 to 10 mph Wind Direction: SSE Forecast: Clear. Low around 74, with temperatures rising to around 76 overnight. South southeast wind 5 to 10 mph. |
Saturday |
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Temperature: 99°F Wind Speed: 0 to 5 mph Wind Direction: S Forecast: Sunny, with a high near 99. South wind 0 to 5 mph. |
Saturday Night |
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Temperature: 75°F Wind Speed: 0 to 5 mph Wind Direction: SSE Forecast: Mostly clear, with a low around 75. South southeast wind 0 to 5 mph. |
Sunday |
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Temperature: 99°F Wind Speed: 0 to 5 mph Wind Direction: SSE Forecast: Sunny, with a high near 99. South southeast wind 0 to 5 mph. |
Sunday Night |
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Temperature: 76°F Wind Speed: 0 to 5 mph Wind Direction: SSE Forecast: Mostly clear, with a low around 76. |
Labor Day |
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Temperature: 99°F Wind Speed: 0 to 5 mph Wind Direction: SSE Forecast: Sunny, with a high near 99. |
Monday Night |
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Temperature: 76°F Wind Speed: 0 to 5 mph Wind Direction: SSE Forecast: Mostly clear, with a low around 76. |
Tuesday |
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Temperature: 100°F Wind Speed: 0 to 10 mph Wind Direction: SSE Forecast: Sunny, with a high near 100. |
Tuesday Night |
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Temperature: 76°F Wind Speed: 10 mph Wind Direction: SSE Forecast: Mostly clear, with a low around 76. |

