Hourly Weather Forecast - Petersburg, IL

12 AM
26°F
10%
11mph
S
Cloudy
Humidity
52%
Feels like
16°F
Dew Point
11°F
1 AM
26°F
0%
11mph
SSW
Mostly Cloudy
Humidity
54%
Feels like
16°F
Dew Point
12°F
2 AM
27°F
0%
12mph
SSW
Partly Cloudy
Humidity
56%
Feels like
16°F
Dew Point
13°F
3 AM
27°F
0%
12mph
SW
Partly Cloudy
Humidity
58%
Feels like
16°F
Dew Point
14°F
4 AM
27°F
0%
12mph
SW
Partly Cloudy
Humidity
59%
Feels like
16°F
Dew Point
15°F
5 AM
26°F
0%
11mph
SW
Partly Cloudy
Humidity
61%
Feels like
16°F
Dew Point
15°F
6 AM
26°F
0%
11mph
SW
Partly Cloudy
Humidity
61%
Feels like
17°F
Dew Point
15°F
7 AM
27°F
0%
11mph
WSW
Partly Cloudy
Humidity
62%
Feels like
17°F
Dew Point
15°F
7:16 AM
8 AM
28°F
0%
11mph
WSW
Partly Cloudy
Humidity
62%
Feels like
18°F
Dew Point
16°F
9 AM
29°F
0%
12mph
WSW
Mostly Cloudy
Humidity
61%
Feels like
19°F
Dew Point
17°F
10 AM
31°F
0%
12mph
WSW
Mostly Cloudy
Humidity
58%
Feels like
21°F
Dew Point
18°F
11 AM
33°F
0%
13mph
W
Mostly Cloudy
Humidity
55%
Feels like
24°F
Dew Point
19°F
12 PM
35°F
0%
13mph
W
Mostly Cloudy
Humidity
53%
Feels like
26°F
Dew Point
19°F
1 PM
36°F
0%
13mph
W
Mostly Cloudy
Humidity
51%
Feels like
27°F
Dew Point
19°F

Snow Forecast through Saturday

Multiple Snowy Systems Hit Great Lakes, Northeast

As one disturbance exits New England tonight, another will be quick on its heels in the Great Lakes on Friday.

Friday's Weather Outlook

Friday's Weather Outlook

Weekend Weather Preview

Weekend Weather Preview

Weekly Drought Map for January 15, 2026

Active Weather Creates Mix of Improvements, Degradations to Drought Depiction

(Image provided by NOAA)

Polar Vortex: What Is It?

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

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