Weather in O'Fallon, United States 🇺🇸
Weather Forecast in O'Fallon
In O'Fallon right now it is 28°C and sunny, feeling like 33°C. Humidity is 79% with winds around 18 km/h, and the UV index is 0 (low). The next few days in O'Fallon look set for about 14°C up to 37°C.
Hourly Forecast for O'Fallon
14-Day Forecast for O'Fallon
Sunny
Sunny
Partly Cloudy
Light rain
Overcast
Sunny
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Sunny
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Sunny
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Additional Forecasts for O'Fallon
Air Quality
Historical Weather
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Best Time to Be Outside in O'Fallon Today
The most comfortable window in O'Fallon today looks like 20:00 to 20:00, when it is around 25°C. It should stay dry through that window. No significant rain is expected in the next several hours.
Frequently Asked Questions about Weather in O'Fallon
What is the temperature in O'Fallon right now?
It is currently 28°C (82°F) in O'Fallon, sunny (feels like 33°C).
What's the weather like in O'Fallon right now?
Right now O'Fallon has Sunny, humidity 79%, wind 18 km/h WSW.
What is today's forecast for O'Fallon?
Today in O'Fallon: high 37°C, low 21°C, sunny. Chance of rain: 36%.
What is the 7-day weather forecast for O'Fallon?
Daily highs and lows for O'Fallon:
- 2026-07-21: 37°C / 21°C
- 2026-07-22: 27°C / 17°C
- 2026-07-23: 23°C / 14°C
- 2026-07-24: 18°C / 15°C
- 2026-07-25: 26°C / 16°C
- 2026-07-26: 35°C / 21°C
- 2026-07-27: 38°C / 25°C
Is it going to rain in O'Fallon today?
There is a 36% chance of rain in O'Fallon today. Total expected precipitation: 0.62 mm.
What is the wind speed in O'Fallon right now?
Wind in O'Fallon is currently 18 km/h (11 mph) from the WSW.
What is the UV index in O'Fallon right now?
The UV index in O'Fallon is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
