Hourly Weather Forecast - O'Fallon, MO

12 AM
36°F
0%
9mph
S
Clear
Humidity
60%
Feels like
28°F
Dew Point
23°F
1 AM
36°F
0%
10mph
S
Mostly Clear
Humidity
61%
Feels like
29°F
Dew Point
24°F
2 AM
37°F
0%
10mph
S
Mostly Clear
Humidity
60%
Feels like
30°F
Dew Point
25°F
3 AM
38°F
0%
10mph
S
Partly Cloudy
Humidity
61%
Feels like
31°F
Dew Point
26°F
4 AM
38°F
0%
10mph
S
Partly Cloudy
Humidity
62%
Feels like
31°F
Dew Point
26°F
5 AM
38°F
0%
10mph
S
Partly Cloudy
Humidity
64%
Feels like
31°F
Dew Point
27°F
6 AM
38°F
0%
10mph
S
Partly Cloudy
Humidity
65%
Feels like
32°F
Dew Point
28°F
7 AM
40°F
0%
11mph
S
Partly Cloudy
Humidity
64%
Feels like
33°F
Dew Point
29°F
7:17 AM
8 AM
42°F
0%
10mph
S
Partly Cloudy
Humidity
62%
Feels like
36°F
Dew Point
30°F
9 AM
44°F
0%
10mph
S
Partly Cloudy
Humidity
60%
Feels like
39°F
Dew Point
31°F
10 AM
47°F
0%
11mph
SSW
Partly Cloudy
Humidity
57%
Feels like
43°F
Dew Point
33°F
11 AM
50°F
0%
11mph
SSW
Partly Cloudy
Humidity
55%
Feels like
50°F
Dew Point
35°F
12 PM
53°F
0%
11mph
SW
Partly Cloudy
Humidity
54%
Feels like
53°F
Dew Point
37°F
1 PM
54°F
0%
11mph
SW
Partly Cloudy
Humidity
54%
Feels like
54°F
Dew Point
38°F
2 PM
55°F
0%
10mph
WSW
Mostly Cloudy
Humidity
55%
Feels like
55°F
Dew Point
39°F
3 PM
53°F
0%
10mph
W
Cloudy
Humidity
57%
Feels like
53°F
Dew Point
39°F
4 PM
51°F
0%
9mph
WNW
Mostly Cloudy
Humidity
60%
Feels like
51°F
Dew Point
37°F
4:43 PM
5 PM
48°F
0%
8mph
NW
Partly Cloudy
Humidity
62%
Feels like
44°F
Dew Point
36°F
6 PM
46°F
0%
8mph
NW
Partly Cloudy
Humidity
64%
Feels like
42°F
Dew Point
34°F
7 PM
44°F
0%
8mph
NNW
Partly Cloudy
Humidity
65%
Feels like
39°F
Dew Point
33°F
8 PM
42°F
0%
8mph
NNW
Partly Cloudy
Humidity
66%
Feels like
37°F
Dew Point
31°F
9 PM
40°F
0%
8mph
NNW
Partly Cloudy
Humidity
67%
Feels like
34°F
Dew Point
29°F
10 PM
38°F
0%
7mph
NNW
Partly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
28°F
11 PM
36°F
0%
7mph
NNW
Partly Cloudy
Humidity
71%
Feels like
31°F
Dew Point
28°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's Weather Outlook

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How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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