Hourly Weather Forecast - Alton, IL

12 AM
32°F
10%
6mph
NW
Partly Cloudy
Humidity
76%
Feels like
26°F
Dew Point
25°F
1 AM
31°F
10%
5mph
NW
Partly Cloudy
Humidity
76%
Feels like
26°F
Dew Point
24°F
2 AM
31°F
10%
5mph
NW
Mostly Cloudy
Humidity
75%
Feels like
25°F
Dew Point
24°F
3 AM
30°F
10%
5mph
NW
Mostly Cloudy
Humidity
75%
Feels like
25°F
Dew Point
23°F
4 AM
30°F
10%
4mph
NW
Partly Cloudy
Humidity
75%
Feels like
25°F
Dew Point
23°F
5 AM
29°F
10%
3mph
NW
Partly Cloudy
Humidity
76%
Feels like
26°F
Dew Point
23°F
6 AM
29°F
10%
2mph
NW
Partly Cloudy
Humidity
76%
Feels like
29°F
Dew Point
22°F
7 AM
29°F
10%
2mph
WNW
Mostly Cloudy
Humidity
76%
Feels like
29°F
Dew Point
22°F
7:09 AM
8 AM
30°F
10%
1mph
W
Mostly Cloudy
Humidity
74%
Feels like
30°F
Dew Point
23°F
9 AM
32°F
10%
1mph
WSW
Mostly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
23°F
10 AM
33°F
10%
1mph
SW
Mostly Cloudy
Humidity
67%
Feels like
33°F
Dew Point
24°F
11 AM
35°F
10%
2mph
SSW
Mostly Cloudy
Humidity
64%
Feels like
35°F
Dew Point
24°F
12 PM
36°F
10%
3mph
SSW
Mostly Cloudy
Humidity
62%
Feels like
36°F
Dew Point
24°F
1 PM
37°F
0%
3mph
S
Mostly Cloudy
Humidity
59%
Feels like
37°F
Dew Point
24°F
2 PM
38°F
10%
3mph
SSE
Mostly Cloudy
Humidity
57%
Feels like
36°F
Dew Point
24°F
3 PM
38°F
10%
3mph
SSE
Mostly Cloudy
Humidity
58%
Feels like
36°F
Dew Point
25°F
4 PM
38°F
20%
4mph
SE
Mostly Cloudy
Humidity
60%
Feels like
35°F
Dew Point
25°F
4:38 PM
5 PM
38°F
20%
4mph
SE
Cloudy
Humidity
63%
Feels like
34°F
Dew Point
26°F
6 PM
37°F
20%
5mph
SE
Cloudy
Humidity
65%
Feels like
34°F
Dew Point
27°F
7 PM
37°F
10%
5mph
SE
Cloudy
Humidity
67%
Feels like
33°F
Dew Point
27°F
8 PM
37°F
10%
6mph
SE
Mostly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
28°F
9 PM
37°F
10%
6mph
SE
Mostly Cloudy
Humidity
72%
Feels like
32°F
Dew Point
28°F
10 PM
36°F
10%
6mph
SE
Mostly Cloudy
Humidity
74%
Feels like
31°F
Dew Point
29°F
11 PM
36°F
30%
6mph
SSE
30% Chance of Light Rain
Humidity
76%
Feels like
31°F
Dew Point
29°F

Rainfall Forecast for Northwest through Thursday

Heavy Rain, Flooding Soaks The Northwest

A fast-moving series of atmospheric rivers continue to drench the Pacific Northwest today through Thursday.

Snow and ice forecast through Thursday A.M.

Snow Barrels Across the Northern U.S.

Today's Weather Outlook

Today's Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide