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Today Hourly 7 days 30 days January
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January 2026 Weather | O'Fallon, Missouri

Thu 1/1
Cloudy Weather
Day 37°
Night 21°
3
Fri 1/2
Cloudy Weather
Day 39°
Night 27°
2
Sat 1/3
Rainy Weather
Day 41°
Night 28°
58
Sun 1/4
Icy Road Conditions
Day 39°
Night 27°
55
Mon 1/5
Rainy Weather
Day 39°
Night 27°
56
Tue 1/6
Snowy Weather
Day 39°
Night 21°
72
Wed 1/7
Sunny Weather
Day 32°
Night 19°
5
Thu 1/8
Cloudy Weather
Day 30°
Night 23°
25
Fri 1/9
Cloudy Weather
Day 39°
Night 28°
25
Sat 1/10
Cloudy Weather
Day 45°
Night 14°
25
Sun 1/11
Cloudy Weather
Day 46°
Night 10°
20
Mon 1/12
Sunny Weather
Day 27°
Night 10°
20
Tue 1/13
Cloudy Weather
Day 28°
Night 12°
25
Wed 1/14
Cloudy Weather
Day 43°
Night 28°
25
Thu 1/15
Cloudy Weather
Day 46°
Night 25°
20
Fri 1/16
Rainy Weather
Day 39°
Night 27°
55
Sat 1/17
Icy Road Conditions
Day 46°
Night 30°
67
Sun 1/18
Rainy Weather
Day 48°
Night 21°
60
Mon 1/19
Cloudy Weather
Day 45°
Night 16°
25
Tue 1/20
Cloudy Weather
Day 28°
Night 12°
10
Wed 1/21
Cloudy Weather
Day 30°
Night 12°
20
Thu 1/22
Cloudy Weather
Day 30°
Night 23°
25
Fri 1/23
Snowy Weather
Day 39°
Night 21°
66
Sat 1/24
Rainy Weather
Day 39°
Night 21°
57
Sun 1/25
Cloudy Weather
Day 39°
Night 28°
25
Mon 1/26
Cloudy Weather
Day 48°
Night 32°
25
Tue 1/27
Rainy Weather
Day 48°
Night 30°
59
Wed 1/28
Sunny Weather
Day 46°
Night 28°
5
Thu 1/29
Cloudy Weather
Day 48°
Night 30°
20
Fri 1/30
Cloudy Weather
Day 48°
Night 30°
20
Sat 1/31
Cloudy Weather
Day 48°
Night 25°
25