Hourly Weather Forecast - Alton, IL

12 AM
63°F
0%
4mph
NE
Mostly Clear
Humidity
64%
Feels like
63°F
Dew Point
51°F
1 AM
61°F
0%
3mph
NE
Mostly Clear
Humidity
69%
Feels like
61°F
Dew Point
51°F
2 AM
59°F
0%
3mph
ENE
Clear
Humidity
74%
Feels like
59°F
Dew Point
50°F
3 AM
56°F
0%
2mph
ENE
Clear
Humidity
80%
Feels like
56°F
Dew Point
50°F
4 AM
54°F
0%
2mph
ENE
Clear
Humidity
85%
Feels like
54°F
Dew Point
49°F
5 AM
52°F
0%
2mph
ENE
Clear
Humidity
89%
Feels like
52°F
Dew Point
49°F
6 AM
54°F
0%
2mph
E
Clear
Humidity
85%
Feels like
54°F
Dew Point
49°F
7 AM
56°F
0%
2mph
E
Mostly Cloudy
Humidity
79%
Feels like
56°F
Dew Point
49°F
7:03 AM
8 AM
60°F
0%
2mph
E
Partly Cloudy
Humidity
70%
Feels like
60°F
Dew Point
50°F
9 AM
62°F
0%
2mph
ESE
Mostly Sunny
Humidity
66%
Feels like
62°F
Dew Point
51°F
10 AM
66°F
0%
3mph
ESE
Sunny
Humidity
61%
Feels like
66°F
Dew Point
52°F
11 AM
69°F
0%
2mph
SE
Sunny
Humidity
55%
Feels like
69°F
Dew Point
52°F
12 PM
73°F
0%
2mph
SSE
Sunny
Humidity
49%
Feels like
73°F
Dew Point
53°F
1 PM
76°F
0%
2mph
S
Sunny
Humidity
45%
Feels like
76°F
Dew Point
53°F
2 PM
78°F
0%
3mph
SSW
Sunny
Humidity
43%
Feels like
78°F
Dew Point
53°F
3 PM
79°F
0%
3mph
SW
Sunny
Humidity
41%
Feels like
79°F
Dew Point
53°F
4 PM
79°F
0%
4mph
SW
Sunny
Humidity
41%
Feels like
79°F
Dew Point
53°F
5 PM
79°F
0%
4mph
SW
Sunny
Humidity
42%
Feels like
79°F
Dew Point
54°F
6 PM
78°F
0%
3mph
SSW
Sunny
Humidity
44%
Feels like
78°F
Dew Point
54°F
7 PM
76°F
0%
4mph
S
Sunny
Humidity
48%
Feels like
76°F
Dew Point
55°F
7:13 PM
8 PM
74°F
0%
4mph
S
Clear
Humidity
52%
Feels like
74°F
Dew Point
56°F
9 PM
73°F
0%
5mph
S
Clear
Humidity
56%
Feels like
73°F
Dew Point
56°F
10 PM
71°F
0%
5mph
S
Clear
Humidity
59%
Feels like
71°F
Dew Point
56°F
11 PM
70°F
0%
6mph
S
Clear
Humidity
61%
Feels like
70°F
Dew Point
56°F

Saturday's High Temperature Outlook

Scorching Heat Continues Across the Southwest

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

Weekend Weather Outlook

Weekend Weather Outlook

Weekly Drought Map for March 19, 2026

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

(Image provided by Pixabay.com)

Lightning Safety

A tree knocked over after a storm produced high winds. (provided by PublicDomainPictures via Pixabay.com)

Strong Winds in the Springtime

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

When Does Spring Begin?

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