Hourly Weather Forecast - Petersburg, IL

2 PM
38°F
0%
3mph
ESE
Partly Cloudy
Humidity
83%
Feels like
36°F
Dew Point
33°F
3 PM
38°F
0%
5mph
SE
Mostly Sunny
Humidity
83%
Feels like
34°F
Dew Point
33°F
4 PM
37°F
0%
6mph
SE
Mostly Sunny
Humidity
84%
Feels like
32°F
Dew Point
33°F
4:35 PM
5 PM
36°F
0%
8mph
SE
Mostly Clear
Humidity
87%
Feels like
30°F
Dew Point
33°F
6 PM
35°F
0%
9mph
SE
Mostly Clear
Humidity
88%
Feels like
29°F
Dew Point
32°F
7 PM
36°F
0%
10mph
SSE
Mostly Clear
Humidity
89%
Feels like
29°F
Dew Point
33°F
8 PM
37°F
0%
11mph
SSE
Mostly Clear
Humidity
88%
Feels like
29°F
Dew Point
34°F
9 PM
38°F
0%
13mph
SSE
Partly Cloudy
Humidity
88%
Feels like
31°F
Dew Point
35°F
10 PM
40°F
0%
13mph
SSE
Partly Cloudy
Humidity
88%
Feels like
32°F
Dew Point
36°F
11 PM
40°F
0%
14mph
S
Mostly Cloudy
Humidity
89%
Feels like
33°F
Dew Point
38°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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