Weather forecast for tomorrow
O'Fallon, IL

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Weather forecast and temperature for tomorrow - Thursday, Jan 23.

AM Clouds / PM Sun
7:10 am

5:13 pm
CST
AM Clouds / PM Sun
28°F / 7°F
  • Wind: 14mph NW
  • Humidity: 63%
  • Precip. probability: 8%
  • Precipitation: 0"
  • UV index: 2
Tomorrow, in O'Fallon, it will be cloudy in the morning. However, the sky will clear during the afternoon, and sunny weather is expected.
A temperature range of a subzero 28.4°F (-2°C) to an extreme-cold 6.8°F (-14°C) is predicted.
The day's peak temperature is anticipated to be noticeably lower than the standard January temperature of 37.8°F (3.2°C).
Sunrise will be at 7:10 am and sunset at 5:13 pm; tomorrow's daylight will last for 10h and 3min.

Frequently asked questions

What is the weather forecast for O'Fallon for tomorrow?

Tomorrow, in O'Fallon, it will be cloudy in the morning. However, the sky will clear, and sunny weather is anticipated in the afternoon.

What will be the highest temperature tomorrow?

Tomorrow, the maximum temperature will be 28.4°F (-2°C), while the minimum temperature will be 6.8°F (-14°C).
The highest temperature will be uncommonly lower than the average maximum of 37.8°F (3.2°C) in January. The lowest temperature will be also notably lower than the average low of 24.6°F (-4.1°C).

When is the sunrise / sunset tomorrow?

On Thursday, in O'Fallon, sunrise will be at 7:10 am and sunset at 5:13 pm (CST).

How long will the day be tomorrow?

Tomorrow, the daylight will last for 10h and 3min.

Hourly weather forecast and temperature - O'Fallon, IL

12 am
  • 25°F
  • Feels like:
    18°F
Cloudy
Cloudy
  • Wind: 7mph WSW
  • Pressure: 30.18"Hg
  • Humidity: 68%
  • Precip. probability: 13%
  • Precipitation: 0"
  • Visibility: 10mi
2 am
  • 25°F
  • Feels like:
    18°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph WSW
  • Pressure: 30.18"Hg
  • Humidity: 76%
  • Precip. probability: 5%
  • Precipitation: 0"
  • Visibility: 10mi
4 am
  • 25°F
  • Feels like:
    18°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph W
  • Pressure: 30.21"Hg
  • Humidity: 83%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 9mi
6 am
  • 25°F
  • Feels like:
    18°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 7mph WNW
  • Pressure: 30.24"Hg
  • Humidity: 84%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 6mi
Sunrise: 7:10 am
8 am
  • 25°F
  • Feels like:
    16°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 9mph WNW
  • Pressure: 30.3"Hg
  • Humidity: 79%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
10 am
  • 28°F
  • Feels like:
    18°F
Cloudy
Cloudy
  • Wind: 13mph NW
  • Pressure: 30.36"Hg
  • Humidity: 70%
  • Precip. probability: 5%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 28°F
  • Feels like:
    18°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 14mph NW
  • Pressure: 30.36"Hg
  • Humidity: 60%
  • Precip. probability: 4%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 28°F
  • Feels like:
    18°F
Partly Cloudy
Partly Cloudy
  • Wind: 12mph NW
  • Pressure: 30.36"Hg
  • Humidity: 52%
  • Precip. probability: 1%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 27°F
  • Feels like:
    16°F
Partly Cloudy
Partly Cloudy
  • Wind: 11mph NW
  • Pressure: 30.39"Hg
  • Humidity: 52%
  • Precip. probability: 1%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 5:13 pm
6 pm
  • 21°F
  • Feels like:
    12°F
Clear
Clear
  • Wind: 7mph NW
  • Pressure: 30.42"Hg
  • Humidity: 58%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
8 pm
  • 18°F
  • Feels like:
    10°F
Clear
Clear
  • Wind: 5mph NNW
  • Pressure: 30.45"Hg
  • Humidity: 67%
  • Precip. probability: 3%
  • Precipitation: 0"
  • Visibility: 10mi
10 pm
  • 14°F
  • Feels like:
    9°F
Clear
Clear
  • Wind: 4mph NW
  • Pressure: 30.45"Hg
  • Humidity: 70%
  • Precip. probability: 3%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, primarily cloudy and occasionally sunny weather is predicted.
The temperature will vary between a minimum of 14°F (-10°C) and a maximum of 28.4°F (-2°C). The warmest part of the day will be from 10 am to 2 pm.
The maximum temperature will be notably lower than January's average highest temperature of 37.8°F (3.2°C). The lowest temperature will be also uncommonly lower than the average minimum of 24.6°F (-4.1°C) in January.
With an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 24.6°F (-4.1°C), January is the coldest month in O'Fallon.
Updated: Jan 22, 2025 @ 17:09:11 UTC
Published by: Weather U.S. | About Us
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Weather Forecasting & Climate

O'Fallon, Illinois, USA

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