Hourly Weather Forecast - Alton, IL

12 AM
63°F
0%
7mph
WSW
Partly Cloudy
Humidity
89%
Feels like
63°F
Dew Point
60°F
1 AM
63°F
10%
7mph
W
Partly Cloudy
Humidity
89%
Feels like
63°F
Dew Point
60°F
2 AM
62°F
10%
7mph
W
Mostly Clear
Humidity
90%
Feels like
62°F
Dew Point
59°F
3 AM
61°F
10%
7mph
WNW
Mostly Clear
Humidity
90%
Feels like
61°F
Dew Point
58°F
4 AM
60°F
10%
7mph
WNW
Hazy
Humidity
91%
Feels like
60°F
Dew Point
57°F
5 AM
58°F
0%
6mph
NW
Partly Cloudy
Humidity
92%
Feels like
58°F
Dew Point
56°F
6 AM
57°F
10%
6mph
NW
Partly Cloudy
Humidity
93%
Feels like
57°F
Dew Point
55°F
7 AM
56°F
10%
6mph
NW
Hazy
Humidity
92%
Feels like
56°F
Dew Point
53°F
7:17 AM
8 AM
56°F
10%
6mph
NW
Mostly Sunny
Humidity
90%
Feels like
56°F
Dew Point
53°F
9 AM
56°F
10%
6mph
NNW
Mostly Sunny
Humidity
85%
Feels like
56°F
Dew Point
52°F
10 AM
58°F
10%
6mph
NNW
Mostly Sunny
Humidity
81%
Feels like
58°F
Dew Point
52°F
11 AM
59°F
10%
6mph
NNW
Mostly Sunny
Humidity
77%
Feels like
59°F
Dew Point
51°F
12 PM
59°F
10%
6mph
NNW
Partly Cloudy
Humidity
74%
Feels like
59°F
Dew Point
51°F
1 PM
60°F
10%
5mph
NNW
Partly Cloudy
Humidity
72%
Feels like
60°F
Dew Point
51°F
2 PM
60°F
10%
5mph
N
Partly Cloudy
Humidity
71%
Feels like
60°F
Dew Point
50°F
3 PM
59°F
10%
5mph
N
Partly Cloudy
Humidity
70%
Feels like
59°F
Dew Point
49°F
4 PM
58°F
10%
4mph
N
Mostly Sunny
Humidity
72%
Feels like
58°F
Dew Point
49°F
4:44 PM
5 PM
56°F
10%
4mph
NNE
Mostly Clear
Humidity
75%
Feels like
56°F
Dew Point
48°F
6 PM
54°F
10%
3mph
NE
Partly Cloudy
Humidity
79%
Feels like
54°F
Dew Point
47°F
7 PM
52°F
0%
3mph
NE
Partly Cloudy
Humidity
81%
Feels like
52°F
Dew Point
47°F
8 PM
51°F
0%
4mph
ENE
Partly Cloudy
Humidity
85%
Feels like
51°F
Dew Point
47°F
9 PM
50°F
10%
4mph
ENE
Partly Cloudy
Humidity
86%
Feels like
49°F
Dew Point
46°F
10 PM
49°F
10%
4mph
E
Mostly Clear
Humidity
88%
Feels like
48°F
Dew Point
46°F
11 PM
48°F
10%
4mph
E
Mostly Clear
Humidity
89%
Feels like
47°F
Dew Point
45°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

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