Hourly Weather Forecast - Petersburg, IL

12 AM
30°F
10%
6mph
SE
Mostly Cloudy
Humidity
66%
Feels like
23°F
Dew Point
20°F
1 AM
30°F
20%
6mph
SE
Mostly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
20°F
2 AM
30°F
20%
6mph
SE
Mostly Cloudy
Humidity
65%
Feels like
23°F
Dew Point
19°F
3 AM
30°F
30%
7mph
SE
30 % Chance of Heavy Snow
Humidity
64%
Feels like
23°F
Dew Point
19°F
4 AM
29°F
30%
7mph
SE
30 % Chance of Heavy Snow
Humidity
64%
Feels like
22°F
Dew Point
19°F
5 AM
29°F
30%
8mph
SE
30 % Chance of Heavy Snow
Humidity
65%
Feels like
22°F
Dew Point
19°F
6 AM
29°F
30%
8mph
SE
30 % Chance of Heavy Snow
Humidity
64%
Feels like
22°F
Dew Point
19°F
7 AM
30°F
20%
8mph
SE
Mostly Cloudy
Humidity
63%
Feels like
22°F
Dew Point
19°F
7:18 AM
8 AM
31°F
20%
9mph
SE
Cloudy
Humidity
61%
Feels like
24°F
Dew Point
20°F
9 AM
33°F
20%
9mph
SE
Cloudy
Humidity
59%
Feels like
26°F
Dew Point
20°F
10 AM
35°F
10%
9mph
SSE
Cloudy
Humidity
57%
Feels like
28°F
Dew Point
21°F
11 AM
37°F
10%
9mph
SSE
Mostly Cloudy
Humidity
54%
Feels like
31°F
Dew Point
22°F
12 PM
39°F
10%
9mph
SSE
Mostly Cloudy
Humidity
53%
Feels like
33°F
Dew Point
24°F
1 PM
41°F
10%
9mph
SSE
Partly Cloudy
Humidity
52%
Feels like
35°F
Dew Point
25°F
2 PM
42°F
10%
9mph
SSE
Partly Cloudy
Humidity
53%
Feels like
36°F
Dew Point
26°F
3 PM
42°F
10%
9mph
SSE
Partly Cloudy
Humidity
55%
Feels like
37°F
Dew Point
27°F
4 PM
41°F
10%
9mph
SSE
Partly Cloudy
Humidity
58%
Feels like
36°F
Dew Point
28°F
4:37 PM
5 PM
40°F
0%
8mph
SSE
Partly Cloudy
Humidity
63%
Feels like
35°F
Dew Point
29°F
6 PM
39°F
0%
8mph
SSE
Partly Cloudy
Humidity
68%
Feels like
34°F
Dew Point
29°F
7 PM
39°F
0%
8mph
SSE
Partly Cloudy
Humidity
72%
Feels like
33°F
Dew Point
31°F
8 PM
38°F
10%
9mph
SSE
Partly Cloudy
Humidity
76%
Feels like
32°F
Dew Point
31°F
9 PM
38°F
10%
9mph
SSE
Partly Cloudy
Humidity
79%
Feels like
32°F
Dew Point
32°F
10 PM
38°F
10%
8mph
SSE
Partly Cloudy
Humidity
82%
Feels like
32°F
Dew Point
33°F
11 PM
38°F
10%
8mph
S
Partly Cloudy
Humidity
85%
Feels like
32°F
Dew Point
34°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide