Hourly Weather Forecast - Alton, IL

12 AM
21°F
10%
8mph
N
Cloudy
Humidity
70%
Feels like
11°F
Dew Point
13°F
1 AM
19°F
10%
8mph
NNW
Mostly Cloudy
Humidity
70%
Feels like
9°F
Dew Point
11°F
2 AM
18°F
10%
8mph
NNW
Partly Cloudy
Humidity
70%
Feels like
8°F
Dew Point
10°F
3 AM
17°F
10%
8mph
NNW
Partly Cloudy
Humidity
70%
Feels like
6°F
Dew Point
8°F
4 AM
15°F
10%
8mph
NNW
Mostly Clear
Humidity
70%
Feels like
5°F
Dew Point
7°F
5 AM
14°F
0%
8mph
NNW
Mostly Clear
Humidity
69%
Feels like
3°F
Dew Point
6°F
6 AM
13°F
0%
8mph
NNW
Clear
Humidity
67%
Feels like
2°F
Dew Point
4°F
7 AM
13°F
0%
7mph
NNW
Clear
Humidity
65%
Feels like
2°F
Dew Point
3°F
7:11 AM
8 AM
13°F
0%
7mph
NNW
Sunny
Humidity
62%
Feels like
2°F
Dew Point
2°F
9 AM
14°F
0%
7mph
NNW
Sunny
Humidity
58%
Feels like
3°F
Dew Point
2°F
10 AM
16°F
0%
7mph
NNW
Sunny
Humidity
52%
Feels like
6°F
Dew Point
1°F
11 AM
17°F
0%
7mph
NNW
Sunny
Humidity
48%
Feels like
8°F
Dew Point
1°F
12 PM
19°F
0%
6mph
N
Sunny
Humidity
44%
Feels like
11°F
Dew Point
1°F
1 PM
20°F
0%
6mph
N
Sunny
Humidity
42%
Feels like
12°F
Dew Point
1°F
2 PM
21°F
0%
6mph
N
Sunny
Humidity
41%
Feels like
13°F
Dew Point
1°F
3 PM
21°F
0%
6mph
N
Sunny
Humidity
41%
Feels like
13°F
Dew Point
1°F
4 PM
20°F
0%
5mph
N
Sunny
Humidity
43%
Feels like
13°F
Dew Point
1°F
4:39 PM
5 PM
19°F
0%
4mph
NNE
Clear
Humidity
46%
Feels like
13°F
Dew Point
2°F
6 PM
19°F
0%
4mph
NNE
Clear
Humidity
49%
Feels like
13°F
Dew Point
3°F
7 PM
18°F
0%
4mph
NE
Clear
Humidity
53%
Feels like
13°F
Dew Point
4°F
8 PM
18°F
0%
4mph
NE
Clear
Humidity
57%
Feels like
12°F
Dew Point
5°F
9 PM
17°F
0%
4mph
ENE
Clear
Humidity
61%
Feels like
11°F
Dew Point
6°F
10 PM
17°F
0%
4mph
E
Clear
Humidity
63%
Feels like
10°F
Dew Point
6°F
11 PM
16°F
0%
4mph
ESE
Clear
Humidity
66%
Feels like
10°F
Dew Point
7°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

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Outdoor Sports Guide