NimbocastMount Vernon, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Mount Vernon, Jefferson County, Illinois.
Updated Jul 29, 2026, 2:17 PM local time · Radar refreshes every 5 minutes
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Mount Vernon
87°F
Wind 7 mph
Humidity 44%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Mount Vernon, IL.
Mount Vernon weather radar
Light
Heavy
Next 24 hours
Now
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86°F
3 PM
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88°F
4 PM
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88°F
5 PM
☀️
88°F
6 PM
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87°F
7 PM
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85°F
8 PM
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81°F
9 PM
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77°F
10 PM
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75°F
11 PM
☀️
73°F
12 AM
☀️
71°F
1 AM
☀️
70°F
2 AM
☀️
69°F
3 AM
☀️
68°F
4 AM
☀️
66°F
5 AM
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65°F
6 AM
☀️
64°F
7 AM
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66°F
8 AM
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72°F
9 AM
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77°F
10 AM
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82°F
11 AM
☀️
85°F
12 PM
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86°F
1 PM
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88°F
7-day forecast
Today
Jul 29
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88°F
62°F
Thu
Jul 30
☁️
90°F
64°F
Fri
Jul 31
🌦️
83°F
65°F
72%
Sat
Aug 1
⛈️
77°F
66°F
72%
Sun
Aug 2
☁️
78°F
63°F
20%
Mon
Aug 3
☀️
81°F
60°F
16%
Tue
Aug 4
☁️
84°F
63°F
21%
Weather near Mount Vernon
41 mi
Marion, IL44 mi
Carbondale, IL58 mi
O'Fallon, IL60 mi
Belleville, IL62 mi
Fairview Heights, IL63 mi
Collinsville, IL66 mi
Edwardsville, IL71 mi
East Saint Louis, IL
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.