O'Fallon, us-Missouri State, USA Weather Information
Local Time
2026-01-31 14:28:20 Central Standard TimeWeather in the past year
Sun & Astronomy
In O'Fallon, us-Missouri State, USA, today's sunrise time is 07:07, sunset time is 17:25, nautical twilight begins at 06:08, nautical twilight ends at 18:24, astronomical twilight begins at 05:37, astronomical twilight ends at 18:55.
Temperature Analysis
In O'Fallon, us-Missouri State, USA region, the lowest temperature occurs in January 2025, with an average temperature of about -3.5°C.
The highest temperature occurs in July 2025, with a maximum temperature of up to 26.8°C.
Based on historical data, the average temperature in January is -3.5°C, February is -0.1°C, March is 10.5°C, April is 14°C, May is 17.5°C, June is 24.3°C, July is 26.8°C, August is 24.5°C, September is 21.9°C, October is 16.3°C, November is 8.3°C, December is 2°C.
Wind Analysis
In O'Fallon, us-Missouri State, USA region, the lowest wind speed occurs in September 2025, with an average wind speed of about 26.7 km/h.
The highest wind speed occurs in March 2025, with a maximum wind speed of up to 46.5 km/h.
Based on historical data, the average wind speed in January is 34.7 km/h, February is 34.8 km/h, March is 46.5 km/h, April is 41.8 km/h, May is 36.7 km/h, June is 32.7 km/h, July is 30.4 km/h, August is 28.2 km/h, September is 26.7 km/h, October is 31.3 km/h, November is 36.2 km/h, December is 37 km/h.
Sunshine Duration Analysis
In O'Fallon, us-Missouri State, USA region, the lowest sunshine duration occurs in December 2025, with an average sunshine duration of about 5.1 hours.
The highest sunshine duration occurs in August 2025, with a maximum sunshine duration of up to 11.9 hours.
Based on historical data, the average sunshine duration in January is 6.6 hours, February is 6.5 hours, March is 8.8 hours, April is 7.5 hours, May is 9.6 hours, June is 10.4 hours, July is 11.3 hours, August is 11.9 hours, September is 10.5 hours, October is 7.9 hours, November is 6.1 hours, December is 5.1 hours.
Precipitation Analysis
In O'Fallon, us-Missouri State, USA region, the lowest precipitation occurs in December 2025, with an average precipitation of about 0.5 mm.
The highest precipitation occurs in April 2025, with a maximum precipitation of up to 6.3 mm.
Based on historical data, the average precipitation in January is 1.4 mm, February is 1.2 mm, March is 3.1 mm, April is 6.3 mm, May is 3.7 mm, June is 4.3 mm, July is 4.7 mm, August is 1 mm, September is 1.3 mm, October is 3.9 mm, November is 1.9 mm, December is 0.5 mm.