NimbocastGranite City, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Granite City, Madison County, Illinois.
Updated Jul 29, 2026, 2:18 PM local time · Radar refreshes every 5 minutes
☀️
Granite City
87°F
Wind 7 mph
Humidity 45%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Granite City, IL.
Granite City weather radar
Light
Heavy
Next 24 hours
Now
☀️
87°F
3 PM
☀️
88°F
4 PM
☀️
88°F
5 PM
☀️
88°F
6 PM
☀️
88°F
7 PM
☀️
86°F
8 PM
☀️
83°F
9 PM
☀️
79°F
10 PM
☀️
76°F
11 PM
☀️
75°F
12 AM
☀️
73°F
1 AM
☀️
72°F
2 AM
☀️
70°F
3 AM
☀️
69°F
4 AM
☀️
67°F
5 AM
☀️
66°F
6 AM
☀️
66°F
7 AM
☀️
67°F
8 AM
☀️
72°F
9 AM
☀️
77°F
10 AM
☀️
81°F
11 AM
☀️
85°F
12 PM
☁️
87°F
1 PM
🌤️
89°F
7-day forecast
Today
Jul 29
🌤️
88°F
68°F
Thu
Jul 30
☁️
91°F
66°F
Fri
Jul 31
🌧️
84°F
71°F
71%
Sat
Aug 1
🌧️
73°F
67°F
71%
Sun
Aug 2
☁️
81°F
64°F
15%
Mon
Aug 3
☀️
82°F
63°F
15%
Tue
Aug 4
⛅
85°F
65°F
13%
Weather near Granite City
5 mi
East Saint Louis, IL6 mi
St. Louis, MO7 mi
Spanish Lake, MO9 mi
University City, MO9 mi
Collinsville, IL9 mi
Ferguson, MO10 mi
Clayton, MO11 mi
Florissant, MO
Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.