Hourly Weather Forecast - Petersburg, IL

12 AM
48°F
0%
7mph
SSE
Mostly Clear
Humidity
59%
Feels like
44°F
Dew Point
34°F
1 AM
47°F
0%
8mph
SSE
Mostly Clear
Humidity
61%
Feels like
43°F
Dew Point
34°F
2 AM
46°F
0%
8mph
SSE
Mostly Clear
Humidity
63%
Feels like
42°F
Dew Point
34°F
3 AM
45°F
0%
8mph
SSE
Mostly Clear
Humidity
66%
Feels like
41°F
Dew Point
34°F
4 AM
44°F
0%
8mph
SSE
Partly Cloudy
Humidity
68%
Feels like
40°F
Dew Point
34°F
5 AM
43°F
0%
8mph
SSE
Partly Cloudy
Humidity
70%
Feels like
39°F
Dew Point
34°F
6 AM
43°F
0%
7mph
SSE
Partly Cloudy
Humidity
71%
Feels like
39°F
Dew Point
34°F
6:55 AM
7 AM
44°F
0%
7mph
SSE
Partly Cloudy
Humidity
71%
Feels like
39°F
Dew Point
35°F
8 AM
46°F
0%
8mph
SSE
Partly Cloudy
Humidity
67%
Feels like
42°F
Dew Point
36°F
9 AM
50°F
10%
9mph
SSE
Partly Cloudy
Humidity
61%
Feels like
50°F
Dew Point
37°F
10 AM
54°F
10%
9mph
S
Partly Cloudy
Humidity
56%
Feels like
54°F
Dew Point
39°F
11 AM
58°F
10%
9mph
S
Partly Cloudy
Humidity
52%
Feels like
58°F
Dew Point
40°F
12 PM
62°F
20%
10mph
S
Partly Cloudy
Humidity
48%
Feels like
62°F
Dew Point
42°F
1 PM
65°F
20%
10mph
S
Partly Cloudy
Humidity
45%
Feels like
65°F
Dew Point
43°F
2 PM
67°F
20%
10mph
S
Partly Cloudy
Humidity
44%
Feels like
67°F
Dew Point
44°F
3 PM
69°F
30%
11mph
S
30% Chance Rain Showers
Humidity
43%
Feels like
69°F
Dew Point
45°F
4 PM
69°F
20%
10mph
S
Partly Cloudy
Humidity
44%
Feels like
69°F
Dew Point
46°F
5 PM
69°F
20%
9mph
S
Partly Cloudy
Humidity
46%
Feels like
69°F
Dew Point
47°F
6 PM
68°F
20%
7mph
SSE
Mostly Sunny
Humidity
49%
Feels like
68°F
Dew Point
47°F
7 PM
66°F
20%
6mph
SSE
Mostly Sunny
Humidity
52%
Feels like
66°F
Dew Point
48°F
7:16 PM
8 PM
64°F
20%
6mph
SSE
Mostly Clear
Humidity
56%
Feels like
64°F
Dew Point
48°F
9 PM
62°F
30%
6mph
SSE
30% Chance Rain Showers
Humidity
61%
Feels like
62°F
Dew Point
48°F
10 PM
60°F
30%
7mph
SSE
30% Chance Rain Showers
Humidity
65%
Feels like
60°F
Dew Point
49°F
11 PM
59°F
30%
7mph
SSE
30% Chance Rain Showers
Humidity
68%
Feels like
59°F
Dew Point
48°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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