Hourly Weather Forecast - Alton, IL

12 AM
37°F
10%
5mph
NNW
Partly Cloudy
Humidity
79%
Feels like
32°F
Dew Point
31°F
1 AM
36°F
0%
5mph
NNW
Mostly Clear
Humidity
78%
Feels like
32°F
Dew Point
30°F
2 AM
35°F
0%
4mph
N
Mostly Clear
Humidity
77%
Feels like
31°F
Dew Point
29°F
3 AM
35°F
0%
4mph
N
Mostly Clear
Humidity
77%
Feels like
31°F
Dew Point
28°F
4 AM
34°F
0%
4mph
N
Mostly Clear
Humidity
77%
Feels like
30°F
Dew Point
27°F
5 AM
33°F
0%
4mph
N
Mostly Clear
Humidity
78%
Feels like
29°F
Dew Point
27°F
6 AM
32°F
0%
4mph
N
Mostly Clear
Humidity
79%
Feels like
28°F
Dew Point
26°F
7 AM
32°F
10%
4mph
N
Mostly Clear
Humidity
78%
Feels like
28°F
Dew Point
26°F
7:15 AM
8 AM
33°F
10%
4mph
N
Mostly Sunny
Humidity
74%
Feels like
29°F
Dew Point
26°F
9 AM
35°F
10%
5mph
NNE
Mostly Sunny
Humidity
69%
Feels like
30°F
Dew Point
26°F
10 AM
37°F
10%
5mph
NNE
Mostly Sunny
Humidity
64%
Feels like
33°F
Dew Point
26°F
11 AM
39°F
10%
4mph
NNE
Mostly Sunny
Humidity
58%
Feels like
35°F
Dew Point
25°F
12 PM
40°F
10%
4mph
NNE
Mostly Sunny
Humidity
54%
Feels like
38°F
Dew Point
25°F
1 PM
42°F
10%
4mph
NNE
Mostly Sunny
Humidity
51%
Feels like
39°F
Dew Point
25°F
2 PM
43°F
10%
5mph
NNE
Mostly Sunny
Humidity
51%
Feels like
40°F
Dew Point
26°F
3 PM
42°F
10%
5mph
NNE
Mostly Sunny
Humidity
52%
Feels like
39°F
Dew Point
26°F
4 PM
41°F
10%
4mph
NNE
Partly Cloudy
Humidity
55%
Feels like
38°F
Dew Point
26°F
4:41 PM
5 PM
38°F
10%
4mph
NE
Partly Cloudy
Humidity
61%
Feels like
35°F
Dew Point
26°F
6 PM
37°F
10%
4mph
NE
Partly Cloudy
Humidity
66%
Feels like
33°F
Dew Point
26°F
7 PM
35°F
10%
4mph
NE
Partly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
27°F
8 PM
35°F
10%
4mph
NE
Partly Cloudy
Humidity
73%
Feels like
31°F
Dew Point
27°F
9 PM
34°F
10%
4mph
ENE
Partly Cloudy
Humidity
75%
Feels like
30°F
Dew Point
27°F
10 PM
34°F
10%
4mph
ENE
Partly Cloudy
Humidity
75%
Feels like
30°F
Dew Point
27°F
11 PM
33°F
10%
4mph
ENE
Partly Cloudy
Humidity
74%
Feels like
30°F
Dew Point
26°F

Rainfall and Snowfall Totals Through Wednesday

Heavy Rain, Snow, and Winds Wallop Northwest

The atmospheric river this week continues to hit the Pacific Northwest with heavy rain, snow, and high winds.

Wednesday's Weather Outlook

Wednesday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide