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O'Fallon Weather
| Su Sep 22 | Mo Sep 23 | Tu Sep 24 | We Sep 25 | |
| Tmin 18-06 |
19°C | 15°C | 16°C | 14°C |
| Tmax 06-18 |
24°C | 19°C | 23°C | 23°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
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Last updated: Su, 22 Sep, 08:18 IST
| Nearby Forecast Locations - O'Fallon | Distance |
| Wentzville | 13.1 km |
| Chesterfield | 15.5 km |
| St Charles | 28.7 km |
| Hazelwood | 28.9 km |
| St. Louis | 29.2 km |
| Washington | 33.2 km |
| Ladue | 33.4 km |
| Black Jack | 37.6 km |
| East St. Louis | 53.5 km |
| Alton | 57.8 km |
| Festus | 68.3 km |
| Sullivan | 75.0 km |
