Hourly Weather Forecast - Alton, IL

12 AM
44°F
10%
2mph
NW
Foggy
Humidity
99%
Feels like
44°F
Dew Point
44°F
1 AM
43°F
10%
2mph
NW
Foggy
Humidity
100%
Feels like
43°F
Dew Point
43°F
2 AM
42°F
10%
2mph
NW
Foggy
Humidity
100%
Feels like
42°F
Dew Point
42°F
3 AM
41°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
41°F
Dew Point
41°F
4 AM
40°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
5 AM
40°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
6 AM
39°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
39°F
Dew Point
39°F
7 AM
40°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
40°F
Dew Point
40°F
7:19 AM
8 AM
41°F
10%
2mph
NNW
Foggy
Humidity
100%
Feels like
41°F
Dew Point
41°F
9 AM
43°F
10%
2mph
NNW
Mostly Cloudy
Humidity
95%
Feels like
43°F
Dew Point
41°F
10 AM
45°F
10%
2mph
NW
Mostly Cloudy
Humidity
88%
Feels like
45°F
Dew Point
42°F
11 AM
47°F
10%
3mph
WNW
Mostly Cloudy
Humidity
81%
Feels like
47°F
Dew Point
42°F
12 PM
50°F
10%
3mph
W
Mostly Cloudy
Humidity
74%
Feels like
50°F
Dew Point
42°F
1 PM
52°F
10%
3mph
WSW
Mostly Cloudy
Humidity
68%
Feels like
52°F
Dew Point
42°F

Rain and Snow Totals Through Friday

2026 Opens with Heavy Rain, Mountain Snow in the West

Significant rain and heavy mountain snow will continue to batter California and the rest of the West for the first few days of 2026.

Friday's Weather Outlook

Extended Weekend Weather Outlook

St. Louis Tornado - May 16th, 2025

2025 Year in Review: Billion-Dollar Disasters From May through June

EF3 tornado damage near Plantersville, Alabama

2025 Year in Review: Billion-Dollar Disasters From February Through April

Photos and videos from the Palisades Fire that started in the City of Los Angeles, January 8, 2025. (CAL FIRE_Official via Wikimedia Commons)

2025 Year in Review: Billion Dollar Disasters - The California Wildfires

Large wall of dust approaching Phoenix Sky Harbor Airport at around 5:30 PM MST (Photo credit: Mike Olbinski via NWS)

2025 Year in Review: Extreme Weather - July Through December

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide