Hourly Weather Forecast - Alton, IL

12 AM
68°F
0%
5mph
S
Clear
Humidity
63%
Feels like
68°F
Dew Point
55°F
1 AM
67°F
0%
5mph
SSW
Clear
Humidity
65%
Feels like
67°F
Dew Point
55°F
2 AM
66°F
0%
5mph
SSW
Clear
Humidity
68%
Feels like
66°F
Dew Point
55°F
3 AM
64°F
0%
5mph
SSW
Clear
Humidity
71%
Feels like
64°F
Dew Point
55°F
4 AM
63°F
0%
5mph
SSW
Clear
Humidity
74%
Feels like
63°F
Dew Point
55°F
5 AM
62°F
0%
5mph
SSW
Clear
Humidity
77%
Feels like
62°F
Dew Point
54°F
6 AM
61°F
0%
5mph
SSW
Clear
Humidity
80%
Feels like
61°F
Dew Point
55°F
7 AM
62°F
0%
6mph
SSW
Clear
Humidity
79%
Feels like
62°F
Dew Point
55°F
7:01 AM
8 AM
65°F
0%
6mph
SSW
Sunny
Humidity
73%
Feels like
65°F
Dew Point
56°F
9 AM
69°F
0%
6mph
SSW
Sunny
Humidity
66%
Feels like
69°F
Dew Point
57°F
10 AM
74°F
0%
7mph
SSW
Sunny
Humidity
57%
Feels like
74°F
Dew Point
58°F
11 AM
78°F
0%
7mph
SW
Sunny
Humidity
51%
Feels like
78°F
Dew Point
59°F
12 PM
83°F
0%
7mph
SW
Mostly Sunny
Humidity
45%
Feels like
83°F
Dew Point
59°F
1 PM
85°F
0%
7mph
WSW
Mostly Sunny
Humidity
40%
Feels like
85°F
Dew Point
58°F
2 PM
87°F
0%
7mph
W
Mostly Sunny
Humidity
37%
Feels like
86°F
Dew Point
57°F
3 PM
87°F
0%
8mph
WNW
Sunny
Humidity
34%
Feels like
86°F
Dew Point
56°F
4 PM
85°F
0%
9mph
NW
Mostly Sunny
Humidity
34%
Feels like
84°F
Dew Point
54°F
5 PM
82°F
0%
11mph
NNW
Mostly Sunny
Humidity
36%
Feels like
81°F
Dew Point
52°F
6 PM
76°F
0%
14mph
NNW
Sunny
Humidity
40%
Feels like
76°F
Dew Point
51°F
7 PM
71°F
10%
15mph
N
Sunny
Humidity
45%
Feels like
71°F
Dew Point
49°F
7:14 PM
8 PM
66°F
10%
15mph
N
Mostly Clear
Humidity
50%
Feels like
66°F
Dew Point
47°F
9 PM
61°F
20%
14mph
N
Mostly Clear
Humidity
55%
Feels like
61°F
Dew Point
45°F
10 PM
57°F
40%
13mph
N
40% Chance Rain Showers
Humidity
59%
Feels like
57°F
Dew Point
43°F
11 PM
55°F
70%
12mph
N
70% Chance Rain Showers
Humidity
61%
Feels like
55°F
Dew Point
41°F

Today's High Temperature Outlook

Dangerous Heat Continues Across the Southwest

Dozens of record high temperatures will be challenged or shattered across the Southwest today.

Today's Weather Outlook

Today's Weather Outlook

Weekend Weather Preview

Weekend Weather Preview

Weekly Drought Map for March 19, 2026

Active Weather, Drought Improvements for Eastern Half; Drying Persists Elsewhere

Story image: WeatherBug user Pat S. captures a plant blooming in Columbia, Md., on February 24, 2017.

When Does Spring Begin?

(Image provided by Pixabay.com)

Lightning Safety

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide