Hourly Weather Forecast - Petersburg, IL

12 AM
42°F
0%
14mph
N
Partly Cloudy
Humidity
62%
Feels like
35°F
Dew Point
30°F
1 AM
40°F
0%
12mph
N
Partly Cloudy
Humidity
63%
Feels like
33°F
Dew Point
29°F
2 AM
39°F
0%
11mph
N
Mostly Clear
Humidity
65%
Feels like
32°F
Dew Point
28°F
3 AM
37°F
0%
10mph
N
Mostly Clear
Humidity
68%
Feels like
30°F
Dew Point
28°F
4 AM
36°F
0%
9mph
N
Clear
Humidity
70%
Feels like
29°F
Dew Point
27°F
5 AM
35°F
0%
8mph
N
Clear
Humidity
73%
Feels like
28°F
Dew Point
27°F
6 AM
33°F
0%
7mph
N
Clear
Humidity
75%
Feels like
27°F
Dew Point
26°F
6:58 AM
7 AM
33°F
0%
7mph
NNE
Sunny
Humidity
75%
Feels like
27°F
Dew Point
26°F
8 AM
35°F
0%
7mph
NNE
Sunny
Humidity
71%
Feels like
29°F
Dew Point
26°F
9 AM
37°F
0%
8mph
NNE
Sunny
Humidity
64%
Feels like
31°F
Dew Point
26°F
10 AM
40°F
0%
8mph
NNE
Mostly Sunny
Humidity
57%
Feels like
35°F
Dew Point
26°F
11 AM
43°F
0%
8mph
NNE
Mostly Sunny
Humidity
52%
Feels like
38°F
Dew Point
27°F
12 PM
46°F
0%
8mph
NNE
Partly Cloudy
Humidity
46%
Feels like
42°F
Dew Point
27°F
1 PM
49°F
0%
8mph
NNE
Partly Cloudy
Humidity
42%
Feels like
46°F
Dew Point
27°F
2 PM
51°F
0%
7mph
NNE
Partly Cloudy
Humidity
39%
Feels like
51°F
Dew Point
27°F
3 PM
52°F
0%
7mph
NNE
Mostly Sunny
Humidity
36%
Feels like
52°F
Dew Point
26°F
4 PM
53°F
0%
7mph
NNE
Sunny
Humidity
35%
Feels like
53°F
Dew Point
26°F
5 PM
52°F
0%
6mph
NE
Sunny
Humidity
36%
Feels like
52°F
Dew Point
26°F
6 PM
50°F
0%
6mph
NE
Mostly Sunny
Humidity
38%
Feels like
50°F
Dew Point
26°F
7 PM
49°F
0%
5mph
NE
Partly Cloudy
Humidity
40%
Feels like
47°F
Dew Point
26°F
7:14 PM
8 PM
47°F
0%
4mph
ENE
Partly Cloudy
Humidity
43%
Feels like
45°F
Dew Point
26°F
9 PM
46°F
0%
4mph
ENE
Partly Cloudy
Humidity
47%
Feels like
44°F
Dew Point
26°F
10 PM
44°F
0%
4mph
E
Partly Cloudy
Humidity
50%
Feels like
42°F
Dew Point
26°F
11 PM
43°F
0%
4mph
E
Partly Cloudy
Humidity
52%
Feels like
40°F
Dew Point
26°F

Today's High Temperature Outlook

Early Spring Heat Wave Zaps Southwest

Much of the Southwest will observe record-breaking heat through the weekend, with high temperatures reminiscent of mid-summer!

Weekend Weather Outlook

Weekend Weather Outlook

Weekly Drought Map for March 19, 2026

Active Weather, Drought Improvements for Eastern Half; Drying Persists Elsewhere

(Image provided by Pixabay.com)

Lightning Safety

A tree knocked over after a storm produced high winds. (provided by PublicDomainPictures via Pixabay.com)

Strong Winds in the Springtime

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

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