Weather in O'Fallon, United States 🇺🇸
In O'Fallon right now it is 12°C and cloudy, feeling like 10°C. The air is at 56% humidity and winds are about 6 km/h, and the UV index is 0 (low). Looking ahead, O'Fallon should sit between roughly 10°C and 25°C over the coming days.
Hourly Forecast for O'Fallon
14-Day Forecast for O'Fallon
Sunny
Sunny
Sunny
Sunny
Overcast
Overcast
Overcast
Patchy rain nearby
Sunny
Sunny
Sunny
Overcast
Overcast
Patchy rain nearby
Additional Forecasts for O'Fallon
Air Quality
Historical Weather
Weather Forecasts for Other Cities in United States
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Best Time to Be Outside in O'Fallon Today
The most comfortable window in O'Fallon today looks like 12:00 to 15:00, when it is around 22°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 12°C (53°F) in O'Fallon, cloudy (feels like 10°C).
What's the weather like in O'Fallon right now?
Right now O'Fallon has Cloudy, humidity 56%, wind 6 km/h S.
What is today's forecast for O'Fallon?
Today in O'Fallon: high 23°C, low 10°C, sunny. Chance of rain: 2%.
What is the 7-day weather forecast for O'Fallon?
Daily highs and lows for O'Fallon:
- 2026-10-20: 23°C / 10°C
- 2026-10-21: 24°C / 11°C
- 2026-10-22: 25°C / 12°C
- 2026-10-23: 26°C / 13°C
- 2026-10-24: 27°C / 14°C
- 2026-10-25: 26°C / 15°C
- 2026-10-26: 24°C / 15°C
Is it going to rain in O'Fallon today?
There is a 2% chance of rain in O'Fallon today.
What is the wind speed in O'Fallon right now?
Wind in O'Fallon is currently 6 km/h (4 mph) from the S.
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.
