Hourly Weather Forecast - Petersburg, IL

12 AM
41°F
0%
5mph
E
Partly Cloudy
Humidity
54%
Feels like
38°F
Dew Point
26°F
1 AM
40°F
0%
5mph
ESE
Partly Cloudy
Humidity
55%
Feels like
37°F
Dew Point
26°F
2 AM
39°F
0%
6mph
ESE
Partly Cloudy
Humidity
56%
Feels like
35°F
Dew Point
25°F
3 AM
38°F
0%
6mph
ESE
Mostly Cloudy
Humidity
57%
Feels like
33°F
Dew Point
24°F
4 AM
37°F
0%
6mph
ESE
Mostly Cloudy
Humidity
59%
Feels like
32°F
Dew Point
24°F
5 AM
36°F
0%
6mph
SE
Partly Cloudy
Humidity
61%
Feels like
31°F
Dew Point
24°F
6 AM
35°F
0%
7mph
SE
Mostly Clear
Humidity
64%
Feels like
30°F
Dew Point
24°F
6:56 AM
7 AM
36°F
0%
7mph
SE
Mostly Sunny
Humidity
64%
Feels like
30°F
Dew Point
25°F
8 AM
38°F
0%
7mph
SE
Mostly Sunny
Humidity
61%
Feels like
33°F
Dew Point
26°F
9 AM
42°F
0%
8mph
SSE
Partly Cloudy
Humidity
55%
Feels like
37°F
Dew Point
27°F
10 AM
46°F
0%
9mph
SSE
Partly Cloudy
Humidity
50%
Feels like
42°F
Dew Point
29°F
11 AM
51°F
0%
9mph
S
Partly Cloudy
Humidity
44%
Feels like
51°F
Dew Point
30°F
12 PM
55°F
0%
9mph
S
Mostly Cloudy
Humidity
38%
Feels like
55°F
Dew Point
30°F
1 PM
59°F
0%
8mph
S
Cloudy
Humidity
34%
Feels like
59°F
Dew Point
31°F
2 PM
61°F
0%
8mph
S
Cloudy
Humidity
32%
Feels like
61°F
Dew Point
31°F
3 PM
62°F
0%
7mph
S
Cloudy
Humidity
31%
Feels like
62°F
Dew Point
31°F
4 PM
63°F
0%
6mph
S
Cloudy
Humidity
31%
Feels like
63°F
Dew Point
31°F
5 PM
62°F
0%
6mph
SSE
Mostly Cloudy
Humidity
33%
Feels like
62°F
Dew Point
32°F
6 PM
60°F
0%
5mph
SSE
Mostly Cloudy
Humidity
37%
Feels like
60°F
Dew Point
33°F
7 PM
57°F
0%
5mph
SE
Partly Cloudy
Humidity
41%
Feels like
57°F
Dew Point
34°F
7:15 PM
8 PM
55°F
0%
5mph
SE
Partly Cloudy
Humidity
46%
Feels like
55°F
Dew Point
35°F
9 PM
53°F
0%
6mph
SSE
Partly Cloudy
Humidity
51%
Feels like
53°F
Dew Point
35°F
10 PM
51°F
0%
6mph
SSE
Partly Cloudy
Humidity
56%
Feels like
51°F
Dew Point
36°F
11 PM
50°F
0%
6mph
SSE
Mostly Cloudy
Humidity
58%
Feels like
50°F
Dew Point
36°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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