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

Today 3/18
Cloudy Weather
Day 64°
Night 41°
3
Thu 3/19
Cloudy Weather
Day 72°
Night 39°
3
Fri 3/20
Cloudy Weather
Day 81°
Night 46°
1
Sat 3/21
Sunny Weather
Day 84°
Night 52°
2
Sun 3/22
Cloudy Weather
Day 75°
Night 37°
2
Mon 3/23
Cloudy Weather
Day 52°
Night 37°
4
Tue 3/24
Cloudy Weather
Day 61°
Night 45°
1
Wed 3/25
Cloudy Weather
Day 72°
Night 52°
9
Thu 3/26
Partly Sunny with Showers
Day 73°
Night 37°
70
Fri 3/27
Cloudy Weather
Day 55°
Night 34°
0
Sat 3/28
Cloudy Weather
Day 55°
Night 43°
2
Sun 3/29
Cloudy Weather
Day 64°
Night 43°
0
Mon 3/30
Cloudy Weather
Day 70°
Night 45°
1
Tue 3/31
Cloudy Weather
Day 61°
Night 37°
25

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