10-Day Weather Forecast for O'Fallon (IL)
Six-hourly outlook through Tuesday 8 September. Updated every three hours via MET Norway.
What's the weather in O'Fallon this week?
Today's weather - Sunday 30 Aug
For the rest of Sunday the predicted weather in O'Fallon is partly cloudy. The temperature will be around 32°C (90°F).
Tomorrow's weather - Monday 31 Aug
The forecast for O'Fallon on Monday is clear skies. Expect highs of a very warm 34°C (93°F) and lows of around 21°C (70°F).
10-Day Weather Forecast
During the next 10 days, temperatures will reach 38°C (100°F) on Thursday before declining again, with average highs of 34°C (93°F) and lows of 26°C (79°F). Compared to August norms, this represents a bit warmer than usual weather. The following 10 days will bring plenty of sunshine. Rainfall is expected to be much less than usual (compared to typical August conditions). The forecast shows mostly dry conditions. Precipitation is expected on roughly 2 days (Fri, Sat). Wind conditions will be generally calm.
Weather Forecast FAQ for O'Fallon
When will be the warmest day next week?
The warmest day is expected to be Thursday with a high of 38°C (100°F).
When will be the coldest day?
The coldest day is forecasted for Monday with a low of 21°C (70°F).
Will it rain next week in O'Fallon?
Yes, rain is expected on 2 days , specifically on Fri, Sat.
How much rainfall is expected next week?
A total of 7 mm (0.3 in) of rain is forecasted for the 10-day period.
What will be the temperature range next week?
Temperatures will range from 21°C (70°F) to 38°C (100°F).
More about O'Fallon
Explore the full O'Fallon climate overview with monthly averages, or check rainfall data and temperature by month.
O'Fallon weather by month
Browse monthly averages for O'Fallon: climate by month with temperature, rainfall and sunshine.
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