Hourly Weather Forecast - Alton, IL

12 AM
60°F
0%
7mph
S
Clear
Humidity
60%
Feels like
60°F
Dew Point
46°F
1 AM
60°F
0%
7mph
S
Clear
Humidity
63%
Feels like
60°F
Dew Point
47°F
2 AM
59°F
0%
7mph
S
Clear
Humidity
65%
Feels like
59°F
Dew Point
47°F
3 AM
58°F
0%
7mph
S
Clear
Humidity
68%
Feels like
58°F
Dew Point
48°F
4 AM
58°F
0%
7mph
S
Clear
Humidity
70%
Feels like
58°F
Dew Point
48°F
5 AM
58°F
0%
7mph
S
Clear
Humidity
72%
Feels like
58°F
Dew Point
49°F
6 AM
58°F
0%
7mph
S
Clear
Humidity
74%
Feels like
58°F
Dew Point
50°F
6:55 AM
7 AM
60°F
0%
7mph
S
Sunny
Humidity
74%
Feels like
60°F
Dew Point
51°F
8 AM
63°F
0%
7mph
SSW
Mostly Sunny
Humidity
70%
Feels like
63°F
Dew Point
53°F
9 AM
67°F
0%
8mph
SSW
Partly Cloudy
Humidity
63%
Feels like
67°F
Dew Point
54°F
10 AM
71°F
0%
9mph
SSW
Mostly Cloudy
Humidity
58%
Feels like
71°F
Dew Point
55°F
11 AM
74°F
0%
10mph
SW
Mostly Cloudy
Humidity
53%
Feels like
74°F
Dew Point
56°F
12 PM
77°F
10%
10mph
SW
Mostly Cloudy
Humidity
48%
Feels like
77°F
Dew Point
56°F
1 PM
79°F
10%
11mph
WSW
Mostly Cloudy
Humidity
45%
Feels like
79°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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