NimbocastUpper Alton, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Upper Alton, Madison County, Illinois.
Updated Jul 29, 2026, 2:17 PM local time · Radar refreshes every 5 minutes
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Upper Alton
85°F
Wind 7 mph
Humidity 45%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
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No active National Weather Service alerts for Upper Alton, IL.
Upper Alton weather radar
Light
Heavy
Next 24 hours
Now
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85°F
3 PM
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86°F
4 PM
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86°F
5 PM
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86°F
6 PM
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86°F
7 PM
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84°F
8 PM
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80°F
9 PM
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77°F
10 PM
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74°F
11 PM
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73°F
12 AM
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71°F
1 AM
☀️
70°F
2 AM
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69°F
3 AM
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67°F
4 AM
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66°F
5 AM
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65°F
6 AM
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65°F
7 AM
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65°F
8 AM
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70°F
9 AM
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75°F
10 AM
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79°F
11 AM
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82°F
12 PM
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85°F
1 PM
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87°F
7-day forecast
Today
Jul 29
🌤️
86°F
67°F
Thu
Jul 30
☁️
89°F
65°F
Fri
Jul 31
🌧️
81°F
67°F
71%
Sat
Aug 1
🌧️
73°F
66°F
71%
Sun
Aug 2
☁️
79°F
64°F
15%
Mon
Aug 3
☀️
81°F
60°F
16%
Tue
Aug 4
🌤️
84°F
62°F
14%
Weather near Upper Alton
2 mi
Alton, IL4 mi
Godfrey, IL9 mi
Spanish Lake, MO9 mi
Old Jamestown, MO13 mi
Florissant, MO13 mi
Edwardsville, IL14 mi
Ferguson, MO15 mi
Granite City, 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.