Hourly Weather Forecast - Alton, IL

9 AM
37°F
0%
7mph
SW
Mostly Sunny
Humidity
80%
Feels like
31°F
Dew Point
31°F
10 AM
40°F
0%
7mph
SW
Mostly Sunny
Humidity
76%
Feels like
35°F
Dew Point
33°F
11 AM
42°F
0%
8mph
SW
Mostly Sunny
Humidity
71%
Feels like
38°F
Dew Point
34°F
12 PM
45°F
0%
8mph
SW
Partly Cloudy
Humidity
68%
Feels like
41°F
Dew Point
35°F
1 PM
47°F
0%
8mph
SSW
Partly Cloudy
Humidity
65%
Feels like
43°F
Dew Point
36°F
2 PM
48°F
0%
8mph
SSW
Partly Cloudy
Humidity
63%
Feels like
45°F
Dew Point
37°F
3 PM
49°F
0%
8mph
S
Partly Cloudy
Humidity
63%
Feels like
45°F
Dew Point
37°F
4 PM
48°F
0%
9mph
S
Partly Cloudy
Humidity
65%
Feels like
44°F
Dew Point
37°F
4:38 PM
5 PM
48°F
0%
10mph
S
Mostly Cloudy
Humidity
65%
Feels like
44°F
Dew Point
37°F
6 PM
48°F
0%
11mph
S
Mostly Cloudy
Humidity
64%
Feels like
43°F
Dew Point
37°F
7 PM
49°F
0%
12mph
SSW
Mostly Cloudy
Humidity
63%
Feels like
44°F
Dew Point
37°F
8 PM
49°F
0%
12mph
SSW
Partly Cloudy
Humidity
62%
Feels like
44°F
Dew Point
36°F
9 PM
49°F
0%
12mph
SSW
Partly Cloudy
Humidity
62%
Feels like
44°F
Dew Point
36°F
10 PM
48°F
0%
12mph
SW
Mostly Cloudy
Humidity
63%
Feels like
43°F
Dew Point
37°F
11 PM
48°F
10%
12mph
SW
Mostly Cloudy
Humidity
65%
Feels like
43°F
Dew Point
37°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