Hourly Weather Forecast - Petersburg, IL

12 AM
31°F
0%
14mph
S
Clear
Humidity
62%
Feels like
21°F
Dew Point
20°F
1 AM
32°F
0%
15mph
S
Mostly Clear
Humidity
63%
Feels like
22°F
Dew Point
21°F
2 AM
32°F
0%
15mph
S
Partly Cloudy
Humidity
64%
Feels like
22°F
Dew Point
21°F
3 AM
33°F
0%
15mph
S
Partly Cloudy
Humidity
64%
Feels like
22°F
Dew Point
22°F
4 AM
33°F
0%
15mph
S
Mostly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
22°F
5 AM
33°F
0%
15mph
S
Mostly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
23°F
6 AM
34°F
0%
15mph
S
Cloudy
Humidity
65%
Feels like
24°F
Dew Point
23°F
7 AM
35°F
0%
14mph
S
Cloudy
Humidity
66%
Feels like
25°F
Dew Point
24°F
7:17 AM
8 AM
36°F
0%
14mph
S
Cloudy
Humidity
66%
Feels like
27°F
Dew Point
26°F
9 AM
37°F
0%
13mph
S
Cloudy
Humidity
66%
Feels like
29°F
Dew Point
27°F
10 AM
40°F
0%
13mph
SSW
Cloudy
Humidity
64%
Feels like
32°F
Dew Point
28°F
11 AM
42°F
0%
12mph
SSW
Cloudy
Humidity
61%
Feels like
35°F
Dew Point
30°F
12 PM
44°F
0%
11mph
SSW
Cloudy
Humidity
60%
Feels like
38°F
Dew Point
31°F
1 PM
45°F
0%
10mph
SW
Cloudy
Humidity
60%
Feels like
40°F
Dew Point
32°F
2 PM
45°F
0%
10mph
WSW
Cloudy
Humidity
60%
Feels like
40°F
Dew Point
32°F
3 PM
44°F
0%
10mph
W
Cloudy
Humidity
62%
Feels like
39°F
Dew Point
32°F
4 PM
42°F
0%
10mph
WNW
Cloudy
Humidity
66%
Feels like
36°F
Dew Point
31°F
4:36 PM
5 PM
39°F
0%
10mph
WNW
Cloudy
Humidity
71%
Feels like
32°F
Dew Point
30°F
6 PM
37°F
10%
10mph
NW
Cloudy
Humidity
74%
Feels like
29°F
Dew Point
29°F
7 PM
35°F
10%
10mph
NW
Partly Cloudy
Humidity
74%
Feels like
27°F
Dew Point
27°F
8 PM
33°F
10%
9mph
NW
Partly Cloudy
Humidity
73%
Feels like
26°F
Dew Point
26°F
9 PM
32°F
0%
9mph
NW
Mostly Clear
Humidity
72%
Feels like
24°F
Dew Point
24°F
10 PM
31°F
0%
8mph
NW
Clear
Humidity
71%
Feels like
23°F
Dew Point
22°F
11 PM
30°F
0%
7mph
NW
Clear
Humidity
71%
Feels like
22°F
Dew Point
21°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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