Hourly Weather Forecast - Alton, IL

12 AM
34°F
10%
4mph
SE
Mostly Cloudy
Humidity
70%
Feels like
30°F
Dew Point
25°F
1 AM
34°F
10%
5mph
SE
Mostly Cloudy
Humidity
70%
Feels like
30°F
Dew Point
25°F
2 AM
34°F
10%
4mph
SE
Mostly Cloudy
Humidity
70%
Feels like
29°F
Dew Point
25°F
3 AM
33°F
10%
4mph
SE
Mostly Cloudy
Humidity
71%
Feels like
29°F
Dew Point
25°F
4 AM
32°F
10%
5mph
SE
Mostly Cloudy
Humidity
73%
Feels like
28°F
Dew Point
25°F
5 AM
31°F
10%
5mph
SE
Partly Cloudy
Humidity
75%
Feels like
27°F
Dew Point
24°F
6 AM
31°F
10%
5mph
SE
Partly Cloudy
Humidity
75%
Feels like
26°F
Dew Point
24°F
7 AM
32°F
10%
5mph
SE
Partly Cloudy
Humidity
74%
Feels like
27°F
Dew Point
24°F
7:16 AM
8 AM
34°F
10%
5mph
SE
Mostly Cloudy
Humidity
69%
Feels like
29°F
Dew Point
25°F
9 AM
37°F
10%
6mph
SE
Cloudy
Humidity
64%
Feels like
32°F
Dew Point
26°F
10 AM
40°F
10%
6mph
SE
Cloudy
Humidity
59%
Feels like
35°F
Dew Point
27°F
11 AM
42°F
10%
6mph
SE
Cloudy
Humidity
56%
Feels like
38°F
Dew Point
28°F
12 PM
44°F
10%
6mph
SE
Cloudy
Humidity
55%
Feels like
41°F
Dew Point
29°F
1 PM
46°F
10%
6mph
SE
Cloudy
Humidity
56%
Feels like
42°F
Dew Point
31°F
2 PM
46°F
10%
6mph
SE
Mostly Cloudy
Humidity
59%
Feels like
43°F
Dew Point
33°F
3 PM
46°F
10%
6mph
SSE
Mostly Cloudy
Humidity
63%
Feels like
43°F
Dew Point
35°F
4 PM
46°F
10%
6mph
SSE
Mostly Cloudy
Humidity
67%
Feels like
43°F
Dew Point
35°F
4:42 PM
5 PM
44°F
10%
6mph
SE
Partly Cloudy
Humidity
72%
Feels like
41°F
Dew Point
36°F
6 PM
43°F
10%
6mph
SE
Partly Cloudy
Humidity
77%
Feels like
40°F
Dew Point
37°F
7 PM
42°F
10%
6mph
SSE
Partly Cloudy
Humidity
72%
Feels like
39°F
Dew Point
34°F
8 PM
42°F
10%
6mph
SSE
Partly Cloudy
Humidity
77%
Feels like
39°F
Dew Point
36°F
9 PM
43°F
10%
6mph
SSE
Mostly Cloudy
Humidity
80%
Feels like
39°F
Dew Point
37°F
10 PM
43°F
10%
6mph
SSE
Partly Cloudy
Humidity
82%
Feels like
39°F
Dew Point
38°F
11 PM
44°F
20%
6mph
S
Partly Cloudy
Humidity
85%
Feels like
40°F
Dew Point
39°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Today's Weather Outlook

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Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

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

Cold Air Damming - Cause And Effects

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