17°
Overcast, feels like 17°.
O'Fallon, Missouri, United States · Wednesday, 4 November 2026
Low/High
9°/17°
Humidity
83%
Chance of rain
29%
Wind
21.2 km/h
UV
3.7
Temperature Tomorrow
O'Fallon Weather Tomorrow by Time of Day
| Time of day | Weather | Weather | Temperature | Chance of rain |
|---|---|---|---|---|
| Morning | | Overcast | 13–14°C | 0% |
| Afternoon | | Overcast | 12–14°C | 0% |
| Evening |  | Partly cloudy | 11–12°C | 0% |
| Night |  | Partly cloudy | 9–11°C | 0% |
O'Fallon Weather Tomorrow — Wednesday, 4 November 2026
| Date | Low/High | Weather | Chance of rain | Wind | Summary |
|---|---|---|---|---|---|
| 9 °/17 ° |
Overcast
|
29% | 21 km/h | Wed 4 Nov WeatherLow/High9°/17° Humidity83% Pressure989 hPa Sunrise/Sunset |
O'Fallon Hourly Weather Tomorrow
| Time | Weather | Weather | Temperature | Feels like | Rain | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| Partly cloudy | 17° | 17° | 29% | 89% | 14 km/h | |
 | Overcast | 17° | 16° | 16% | 84% | 17 km/h | |
| Overcast | 15° | 14° | 6% | 86% | 15 km/h | |
| Overcast | 15° | 14° | 0% | 89% | 15 km/h | |
| Overcast | 15° | 14° | 0% | 90% | 14 km/h | |
| Overcast | 14° | 13° | 0% | 89% | 13 km/h | |
| Overcast | 14° | 12° | 0% | 87% | 15 km/h | |
| Overcast | 14° | 12° | 0% | 86% | 13 km/h | |
| Overcast | 14° | 11° | 0% | 84% | 17 km/h | |
| Overcast | 13° | 11° | 0% | 84% | 18 km/h | |
| Overcast | 14° | 11° | 0% | 81% | 20 km/h | |
| Overcast | 14° | 11° | 0% | 79% | 21 km/h | |
| Overcast | 14° | 11° | 0% | 77% | 21 km/h | |
| Overcast | 14° | 11° | 0% | 78% | 20 km/h | |
| Partly cloudy | 13° | 10° | 0% | 78% | 17 km/h | |
| Overcast | 13° | 10° | 0% | 77% | 17 km/h | |
| Partly cloudy | 12° | 9° | 0% | 80% | 17 km/h | |
| Partly cloudy | 12° | 10° | 0% | 81% | 12 km/h | |
| Partly cloudy | 12° | 10° | 0% | 82% | 12 km/h | |
| Partly cloudy | 12° | 10° | 0% | 82% | 9 km/h | |
| Partly cloudy | 11° | 10° | 0% | 82% | 8 km/h | |
| Partly cloudy | 11° | 10° | 0% | 84% | 6 km/h | |
| Partly cloudy | 10° | 8° | 0% | 80% | 13 km/h | |
| Partly cloudy | 9° | 6° | 0% | 83% | 13 km/h | |
Summary
Tomorrow, Wednesday 4 November 2026, the weather in O'Fallon is forecast to be overcast, with temperatures of 9–17°C and a chance of rain of up to 29%. It should stay mostly dry.
Updated at 21:48 local time, 3 November 2026
O'Fallon Hourly Temperature and Chance of Rain
O'Fallon Air Quality
Good · AQI 31Air quality is good and poses little or no risk for outdoor activity.
PM2.5 (µg/m³)1.2
PM10 (µg/m³)1.3
O₃ (µg/m³)54
NO₂ (µg/m³)5.0
SO₂ (µg/m³)1.3
CO (µg/m³)150
Windy Map
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