Hourly Weather Forecast - Petersburg, IL

12 PM
74°F
0%
8mph
S
Sunny
Humidity
40%
Feels like
74°F
Dew Point
48°F
1 PM
78°F
0%
9mph
S
Sunny
Humidity
35%
Feels like
78°F
Dew Point
48°F
2 PM
82°F
0%
9mph
SSW
Sunny
Humidity
31%
Feels like
80°F
Dew Point
48°F
3 PM
84°F
0%
9mph
SSW
Sunny
Humidity
29%
Feels like
82°F
Dew Point
48°F
4 PM
84°F
0%
10mph
SW
Sunny
Humidity
28%
Feels like
82°F
Dew Point
48°F
5 PM
83°F
0%
9mph
SSW
Sunny
Humidity
30%
Feels like
81°F
Dew Point
48°F
6 PM
80°F
0%
8mph
SSW
Sunny
Humidity
34%
Feels like
80°F
Dew Point
49°F
7 PM
76°F
0%
7mph
SSW
Sunny
Humidity
39%
Feels like
76°F
Dew Point
49°F
7:12 PM
8 PM
73°F
0%
8mph
SSW
Clear
Humidity
44%
Feels like
73°F
Dew Point
50°F
9 PM
70°F
0%
9mph
S
Clear
Humidity
49%
Feels like
70°F
Dew Point
50°F
10 PM
67°F
0%
10mph
S
Clear
Humidity
55%
Feels like
67°F
Dew Point
50°F
11 PM
66°F
0%
10mph
S
Clear
Humidity
58%
Feels like
66°F
Dew Point
51°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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