Weather forecast for tomorrow
O'Fallon, IL

Weather forecast for tomorrow

Thursday, May 1.

Thunderstorms
6:00 am

7:53 pm
CDT
Thunderstorms
72°F / 57°F
  • Wind: 12mph WSW
  • Humidity: 79%
  • Precip. probability: 65%
  • Precipitation: 0.28"
  • UV index: 5
Tomorrow, in O'Fallon, moderate to strong thunderstorms are in the outlook.
With a high probability, light precipitation is expected. The anticipated temperature range extends from a high of a pleasant 71.6°F to a low of a refreshing 57.2°F.
Forecast models suggest warmer conditions, with a peak that mirrors May's climate average rather than April's.
Sunrise will be at 6:00 am and sunset at 7:53 pm; tomorrow's daylight will last for 13h and 53min.

Frequently asked questions

What is the weather forecast for O'Fallon for tomorrow?
On Thursday, unstable atmospheric conditions may lead to thunderstorms.
Will it rain tomorrow?
Light precipitation of 0.28" is predicted. The chance of rainfall is 65%.
What will be the highest temperature tomorrow?
Tomorrow, the maximum temperature in O'Fallon will be 71.6°F, while the minimum temperature will be 57.2°F.
The highest temperature will be a couple of degrees higher than the average maximum of 64.9°F in April. The lowest temperature will be significantly higher than the average low of 47.8°F.
When are sunrise and sunset tomorrow in O'Fallon?
On Thursday, in O'Fallon, sunrise will be at 6:00 am and sunset at 7:53 pm (CDT).
How many hours of daylight will O'Fallon have tomorrow?
In O'Fallon, tomorrow, there will be 13h and 53min of daylight.

Hourly weather forecast

12 am
  • 66°F
  • Feels like:
    68°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 6mph SSE
  • Pressure: 29.77"Hg
  • Humidity: 91%
  • Precip. probability: 54%
  • Precipitation: 0.08"
  • Visibility: 6mi
2 am
  • 64°F
  • Feels like:
    66°F
Cloudy
Cloudy
  • Wind: 10mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 93%
  • Precip. probability: 22%
  • Precipitation: 0"
  • Visibility: 7mi
4 am
  • 64°F
  • Feels like:
    64°F
Cloudy
Cloudy
  • Wind: 8mph SSW
  • Pressure: 29.74"Hg
  • Humidity: 92%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 9mi
6 am
  • 64°F
  • Feels like:
    63°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 8mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 91%
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Visibility: 9mi
Sunrise: 6:00 am
8 am
  • 64°F
  • Feels like:
    64°F
Showers
Showers
  • Wind: 9mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 90%
  • Precip. probability: 54%
  • Precipitation: 0.04"
  • Visibility: 7mi
10 am
  • 66°F
  • Feels like:
    68°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 11mph SW
  • Pressure: 29.8"Hg
  • Humidity: 84%
  • Precip. probability: 45%
  • Precipitation: 0.08"
  • Visibility: 7mi
12 pm
  • 70°F
  • Feels like:
    70°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 11mph SW
  • Pressure: 29.77"Hg
  • Humidity: 78%
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Visibility: 9mi
2 pm
  • 72°F
  • Feels like:
    72°F
Thunderstorms
Thunderstorms
  • Wind: 11mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 74%
  • Precip. probability: 66%
  • Precipitation: 0.08"
  • Visibility: 6mi
4 pm
  • 70°F
  • Feels like:
    70°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 11mph W
  • Pressure: 29.74"Hg
  • Humidity: 73%
  • Precip. probability: 44%
  • Precipitation: 0.04"
  • Visibility: 7mi
6 pm
  • 70°F
  • Feels like:
    70°F
Partly Cloudy
Partly Cloudy
  • Wind: 9mph W
  • Pressure: 29.77"Hg
  • Humidity: 71%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 7:53 pm
8 pm
  • 66°F
  • Feels like:
    66°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph W
  • Pressure: 29.8"Hg
  • Humidity: 79%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 10mi
10 pm
  • 63°F
  • Feels like:
    63°F
Partly Cloudy
Partly Cloudy
  • Wind: 4mph W
  • Pressure: 29.83"Hg
  • Humidity: 87%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, on Thursday, a combination of gloomy, unstable and rain-filled weather is forecasted.
Rainfall is predicted at 12 am, 1 am, and from 6 am to 4 pm. The most intense rain will be falling at 12 am, 10 am and 2 pm.
The temperature will vary between a minimum of 62.6°F and a maximum of 71.6°F. The warmest part of the day will be at 2 pm and 3 pm.
The forecasted high is more comparable to May's typical maximum of 74.8°F than the usual for April. The lowest temperature is also more close to May's average minimum of 57.9°F than the usual minimum of 47.8°F in April.
Updated: Apr 30, 2025 @ 11:06:53 UTC
Published by: Weather U.S. | About Us
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