Hourly Weather Forecast - Alton, IL

12 AM
62°F
10%
6mph
SSW
Mostly Cloudy
Humidity
92%
Feels like
62°F
Dew Point
60°F
1 AM
62°F
0%
5mph
SSW
Mostly Cloudy
Humidity
92%
Feels like
62°F
Dew Point
60°F
2 AM
62°F
0%
5mph
SSW
Mostly Cloudy
Humidity
93%
Feels like
62°F
Dew Point
59°F
3 AM
61°F
10%
5mph
SSW
Mostly Cloudy
Humidity
93%
Feels like
61°F
Dew Point
59°F
4 AM
61°F
10%
5mph
SSW
Mostly Cloudy
Humidity
94%
Feels like
61°F
Dew Point
59°F
5 AM
61°F
10%
4mph
SSW
Mostly Cloudy
Humidity
95%
Feels like
61°F
Dew Point
59°F
6 AM
60°F
10%
4mph
SSW
Mostly Cloudy
Humidity
95%
Feels like
60°F
Dew Point
59°F
7 AM
61°F
10%
4mph
SSW
Mostly Cloudy
Humidity
95%
Feels like
61°F
Dew Point
59°F
7:17 AM
8 AM
62°F
10%
5mph
SSW
Partly Cloudy
Humidity
93%
Feels like
62°F
Dew Point
60°F
9 AM
63°F
10%
5mph
SSW
Partly Cloudy
Humidity
90%
Feels like
63°F
Dew Point
60°F
10 AM
65°F
10%
6mph
SSW
Partly Cloudy
Humidity
86%
Feels like
65°F
Dew Point
61°F
11 AM
67°F
10%
7mph
SSW
Partly Cloudy
Humidity
82%
Feels like
67°F
Dew Point
61°F
12 PM
68°F
10%
7mph
SSW
Partly Cloudy
Humidity
79%
Feels like
68°F
Dew Point
61°F
1 PM
70°F
10%
7mph
SSW
Partly Cloudy
Humidity
75%
Feels like
70°F
Dew Point
62°F
2 PM
71°F
10%
7mph
SSW
Partly Cloudy
Humidity
72%
Feels like
71°F
Dew Point
61°F
3 PM
71°F
0%
6mph
SSW
Partly Cloudy
Humidity
72%
Feels like
71°F
Dew Point
61°F
4 PM
70°F
10%
6mph
SSW
Mostly Sunny
Humidity
74%
Feels like
70°F
Dew Point
61°F
4:44 PM
5 PM
69°F
10%
6mph
SSW
Mostly Clear
Humidity
75%
Feels like
69°F
Dew Point
61°F
6 PM
68°F
0%
6mph
SSW
Mostly Clear
Humidity
77%
Feels like
68°F
Dew Point
60°F
7 PM
67°F
0%
6mph
SSW
Mostly Clear
Humidity
79%
Feels like
67°F
Dew Point
60°F
8 PM
66°F
0%
6mph
SW
Partly Cloudy
Humidity
82%
Feels like
66°F
Dew Point
60°F
9 PM
65°F
30%
6mph
SW
30% Chance Rain Showers
Humidity
84%
Feels like
65°F
Dew Point
60°F
10 PM
64°F
30%
7mph
SW
30% Chance Rain Showers
Humidity
85%
Feels like
64°F
Dew Point
60°F
11 PM
64°F
0%
7mph
SW
Partly Cloudy
Humidity
87%
Feels like
64°F
Dew Point
60°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California through Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Sunday's Weather Outlook

Sunday's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide