For the rest of Tuesday the predicted weather in O'Fallon is mostly sunny with some rain during the evening. The temperature will be around 31°C (88°F).

Tomorrow's weather - Wednesday 14 Oct

The forecast for O'Fallon on Wednesday is cloudy with some rain during the morning and night. Expect highs of a warm 26°C (79°F) and lows of around 22°C (72°F).

10-Day Weather Forecast

During the next 10 days, temperatures will get cooler from 31°C (88°F) down to 24°C (75°F), with average highs of 22°C (72°F) and lows of 15°C (59°F). Compared to October norms, this represents a bit warmer than usual weather. The following 10 days will bring plenty of sunshine. Precipitation will be about normal, with mixed conditions, with some heavy rain showers especially on Tue, Thu. Precipitation is expected on roughly 3 days (Tue, Wed, Thu).

Weather Forecast FAQ for O'Fallon

When will be the warmest day next week?

The warmest day is expected to be Tuesday with a high of 31°C (88°F).

When will be the coldest day?

The coldest day is forecasted for Saturday with a low of 7°C (45°F).

Will it rain next week in O'Fallon?

Yes, rain is expected on 3 days , specifically on Tue, Wed, Thu.

How much rainfall is expected next week?

A total of 18 mm (0.7 in) of rain is forecasted for the 10-day period.

What will be the temperature range next week?

Temperatures will range from 7°C (45°F) to 31°C (88°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.

January February March April May June July August September October November December

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