Hourly Weather Forecast - Petersburg, IL

12 AM
29°F
0%
7mph
NW
Clear
Humidity
70%
Feels like
21°F
Dew Point
20°F
1 AM
28°F
0%
6mph
NW
Clear
Humidity
71%
Feels like
21°F
Dew Point
20°F
2 AM
27°F
0%
6mph
NW
Clear
Humidity
71%
Feels like
20°F
Dew Point
19°F
3 AM
27°F
0%
6mph
NW
Clear
Humidity
71%
Feels like
20°F
Dew Point
19°F
4 AM
26°F
0%
6mph
NW
Clear
Humidity
72%
Feels like
20°F
Dew Point
18°F
5 AM
26°F
0%
5mph
NW
Clear
Humidity
72%
Feels like
19°F
Dew Point
18°F
6 AM
26°F
0%
5mph
NW
Clear
Humidity
72%
Feels like
20°F
Dew Point
18°F
7 AM
26°F
0%
5mph
NW
Clear
Humidity
70%
Feels like
20°F
Dew Point
18°F
7:17 AM
8 AM
27°F
0%
5mph
NW
Sunny
Humidity
66%
Feels like
22°F
Dew Point
17°F
9 AM
29°F
0%
4mph
WNW
Sunny
Humidity
62%
Feels like
24°F
Dew Point
17°F
10 AM
31°F
0%
4mph
WNW
Sunny
Humidity
57%
Feels like
26°F
Dew Point
18°F
11 AM
34°F
0%
4mph
WNW
Mostly Sunny
Humidity
51%
Feels like
30°F
Dew Point
17°F
12 PM
36°F
0%
4mph
WNW
Mostly Sunny
Humidity
47%
Feels like
32°F
Dew Point
17°F
1 PM
37°F
0%
4mph
WNW
Mostly Sunny
Humidity
45%
Feels like
34°F
Dew Point
18°F
2 PM
38°F
0%
3mph
WNW
Sunny
Humidity
45%
Feels like
36°F
Dew Point
18°F
3 PM
38°F
0%
2mph
WNW
Sunny
Humidity
46%
Feels like
38°F
Dew Point
19°F
4 PM
36°F
0%
1mph
NW
Mostly Sunny
Humidity
51%
Feels like
36°F
Dew Point
20°F
4:37 PM
5 PM
34°F
0%
2mph
ENE
Partly Cloudy
Humidity
58%
Feels like
34°F
Dew Point
20°F
6 PM
32°F
0%
4mph
E
Partly Cloudy
Humidity
64%
Feels like
28°F
Dew Point
21°F
7 PM
31°F
0%
4mph
E
Mostly Cloudy
Humidity
67%
Feels like
27°F
Dew Point
21°F
8 PM
30°F
0%
4mph
ESE
Mostly Cloudy
Humidity
69%
Feels like
26°F
Dew Point
21°F
9 PM
30°F
0%
5mph
ESE
Cloudy
Humidity
69%
Feels like
25°F
Dew Point
21°F
10 PM
30°F
0%
5mph
SE
Cloudy
Humidity
69%
Feels like
24°F
Dew Point
21°F
11 PM
30°F
10%
6mph
SE
Mostly Cloudy
Humidity
67%
Feels like
24°F
Dew Point
20°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

How to Measure Snow via NWS

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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