Hourly Weather Forecast - Petersburg, IL

1 PM
24°F
0%
6mph
WSW
Sunny
Humidity
43%
Feels like
16°F
Dew Point
4°F
2 PM
26°F
0%
7mph
SW
Sunny
Humidity
40%
Feels like
17°F
Dew Point
5°F
3 PM
26°F
0%
8mph
SW
Sunny
Humidity
39%
Feels like
18°F
Dew Point
5°F
4 PM
26°F
0%
8mph
SSW
Partly Cloudy
Humidity
41%
Feels like
18°F
Dew Point
6°F
4:58 PM
5 PM
25°F
0%
8mph
SSW
Partly Cloudy
Humidity
44%
Feels like
16°F
Dew Point
6°F
6 PM
24°F
30%
8mph
S
30% Chance Snow Showers
Humidity
47%
Feels like
16°F
Dew Point
7°F
7 PM
25°F
30%
9mph
S
30% Chance Snow Showers
Humidity
48%
Feels like
15°F
Dew Point
8°F
8 PM
25°F
30%
10mph
S
30% Chance of Snow
Humidity
47%
Feels like
15°F
Dew Point
8°F
9 PM
26°F
30%
10mph
SSW
30 % Chance of Heavy Snow
Humidity
49%
Feels like
16°F
Dew Point
9°F
10 PM
26°F
50%
10mph
S
50% Chance of Heavy Snow
Humidity
55%
Feels like
16°F
Dew Point
12°F
11 PM
26°F
50%
11mph
S
50% Chance of Heavy Snow
Humidity
62%
Feels like
17°F
Dew Point
15°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

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

Windchill chart

Dangers of Wind Chills

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