Hourly Weather Forecast - O'Fallon, IL

12 AM
41°F
0%
6mph
E
Mostly Cloudy
Humidity
69%
Feels like
37°F
Dew Point
32°F
1 AM
40°F
0%
6mph
ESE
Cloudy
Humidity
71%
Feels like
36°F
Dew Point
32°F
2 AM
40°F
0%
6mph
ESE
Cloudy
Humidity
72%
Feels like
35°F
Dew Point
31°F
3 AM
39°F
0%
6mph
ESE
Cloudy
Humidity
74%
Feels like
34°F
Dew Point
31°F
4 AM
38°F
0%
6mph
ESE
Mostly Cloudy
Humidity
75%
Feels like
33°F
Dew Point
31°F
5 AM
37°F
0%
6mph
ESE
Mostly Cloudy
Humidity
77%
Feels like
32°F
Dew Point
31°F
6 AM
37°F
0%
6mph
ESE
Partly Cloudy
Humidity
78%
Feels like
32°F
Dew Point
31°F
6:57 AM
7 AM
39°F
0%
6mph
SE
Partly Cloudy
Humidity
75%
Feels like
34°F
Dew Point
32°F
8 AM
42°F
0%
7mph
SE
Partly Cloudy
Humidity
68%
Feels like
38°F
Dew Point
32°F
9 AM
46°F
0%
7mph
SE
Mostly Cloudy
Humidity
60%
Feels like
42°F
Dew Point
33°F
10 AM
50°F
0%
8mph
SSE
Cloudy
Humidity
53%
Feels like
46°F
Dew Point
33°F
11 AM
53°F
0%
8mph
SSE
Cloudy
Humidity
48%
Feels like
53°F
Dew Point
34°F
12 PM
55°F
10%
8mph
SSE
Cloudy
Humidity
44%
Feels like
55°F
Dew Point
34°F
1 PM
57°F
20%
7mph
SSE
Cloudy
Humidity
40%
Feels like
57°F
Dew Point
34°F
2 PM
59°F
30%
7mph
S
30% Chance of Light Rain
Humidity
39%
Feels like
59°F
Dew Point
34°F
3 PM
60°F
40%
6mph
S
40% Chance of Light Rain
Humidity
38%
Feels like
60°F
Dew Point
34°F
4 PM
59°F
40%
6mph
S
40% Chance of Light Rain
Humidity
39%
Feels like
59°F
Dew Point
34°F
5 PM
58°F
30%
5mph
SSE
30% Chance Rain Showers
Humidity
42%
Feels like
58°F
Dew Point
35°F
6 PM
55°F
20%
4mph
SE
Partly Cloudy
Humidity
47%
Feels like
55°F
Dew Point
36°F
7 PM
53°F
30%
4mph
SE
30% Chance Rain Showers
Humidity
52%
Feels like
53°F
Dew Point
36°F
7:15 PM
8 PM
51°F
30%
3mph
SE
30% Chance Rain Showers
Humidity
57%
Feels like
51°F
Dew Point
37°F
9 PM
50°F
40%
4mph
SE
40% Chance Rain Showers
Humidity
62%
Feels like
49°F
Dew Point
37°F
10 PM
48°F
30%
4mph
SE
30% Chance Rain Showers
Humidity
67%
Feels like
47°F
Dew Point
38°F
11 PM
47°F
30%
4mph
SE
30% Chance Rain Showers
Humidity
71%
Feels like
45°F
Dew Point
38°F

Today's High Temperature Outlook

Dangerous Heat Continues Across the Southwest

Dozens of record high temperatures will be challenged or shattered across the Southwest today.

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Today's Weather Outlook

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Weekly Drought Map for March 19, 2026

Active Weather, Drought Improvements for Eastern Half; Drying Persists Elsewhere

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

(Image provided by Pixabay.com)

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