NimbocastCollinsville, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Collinsville, Madison County, Illinois.
Updated Jul 29, 2026, 2:18 PM local time · Radar refreshes every 5 minutes
☀️
Collinsville
87°F
Wind 7 mph
Humidity 45%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Collinsville, IL.
Collinsville weather radar
Light
Heavy
Next 24 hours
Now
☀️
87°F
3 PM
☀️
88°F
4 PM
☀️
88°F
5 PM
☀️
88°F
6 PM
☀️
87°F
7 PM
☀️
86°F
8 PM
☀️
83°F
9 PM
☀️
80°F
10 PM
☀️
77°F
11 PM
☀️
76°F
12 AM
☀️
75°F
1 AM
☀️
74°F
2 AM
☀️
72°F
3 AM
☀️
71°F
4 AM
☀️
70°F
5 AM
☀️
69°F
6 AM
☀️
67°F
7 AM
☀️
69°F
8 AM
☀️
74°F
9 AM
☀️
78°F
10 AM
☀️
82°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
67°F
Fri
Jul 31
🌧️
80°F
70°F
72%
Sat
Aug 1
🌧️
73°F
66°F
72%
Sun
Aug 2
☁️
79°F
63°F
16%
Mon
Aug 3
☀️
81°F
60°F
16%
Tue
Aug 4
⛅
84°F
63°F
15%
Weather near Collinsville
6 mi
Fairview Heights, IL7 mi
O'Fallon, IL9 mi
Granite City, IL10 mi
Belleville, IL10 mi
East Saint Louis, IL10 mi
Edwardsville, IL12 mi
St. Louis, MO15 mi
Spanish Lake, 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.