NimbocastOld Jamestown, MO Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Old Jamestown, Saint Louis County, Missouri.
Updated Jul 29, 2026, 2:55 PM local time · Radar refreshes every 5 minutes
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Old Jamestown
86°F
Wind 7 mph
Humidity 40%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Old Jamestown, MO.
Old Jamestown 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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87°F
5 PM
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86°F
6 PM
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86°F
7 PM
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83°F
8 PM
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80°F
9 PM
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77°F
10 PM
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75°F
11 PM
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74°F
12 AM
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72°F
1 AM
☀️
71°F
2 AM
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69°F
3 AM
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68°F
4 AM
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67°F
5 AM
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66°F
6 AM
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66°F
7 AM
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66°F
8 AM
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70°F
9 AM
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74°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
🌤️
87°F
68°F
Thu
Jul 30
☁️
89°F
66°F
Fri
Jul 31
🌧️
83°F
70°F
70%
Sat
Aug 1
🌦️
73°F
66°F
70%
Sun
Aug 2
☁️
80°F
64°F
14%
Mon
Aug 3
☀️
81°F
60°F
15%
Tue
Aug 4
⛅
85°F
63°F
12%
Weather near Old Jamestown
4 mi
Florissant, MO5 mi
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Upper Alton, IL10 mi
Godfrey, IL10 mi
Overland, 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.