18°
Overcast, feels like 17°.
O'Fallon, Missouri, United States · Tuesday, 3 November 2026 21:45 local time
Low/High
17°/21°
Humidity
90%
Visibility
14.1 km
Wind
15.5 km/h
Dew point
16°
UV
0.0
Next 24 Hours
O'Fallon Hourly Weather — 48 hours ahead
| Time | Weather | Weather | Temperature | Feels like | Rain | Humidity | Wind |
|---|---|---|---|---|---|---|---|
 | Light showers | 18° | 17° | 94% | 88% | 21 km/h | |
| Overcast | 18° | 18° | 75% | 90% | 14 km/h | |
| Overcast | 17° | 17° | 50% | 90% | 14 km/h | |
 | 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 | |
| Partly cloudy | 8° | 6° | 0% | 87% | 9 km/h | |
| Partly cloudy | 8° | 6° | 0% | 89% | 8 km/h | |
| Partly cloudy | 8° | 5° | 0% | 87% | 10 km/h | |
| Mostly clear | 8° | 6° | 0% | 85% | 10 km/h | |
 | Clear sky | 9° | 6° | 0% | 84% | 12 km/h | |
| Mostly clear | 9° | 7° | 0% | 86% | 9 km/h | |
| Mostly clear | 8° | 5° | 0% | 88% | 11 km/h | |
 | Clear sky | 7° | 4° | 0% | 87% | 12 km/h | |
| Clear sky | 9° | 5° | 0% | 82% | 18 km/h | |
| Clear sky | 10° | 6° | 0% | 80% | 19 km/h | |
| Clear sky | 11° | 7° | 0% | 78% | 21 km/h | |
| Mostly clear | 12° | 8° | 0% | 75% | 21 km/h | |
| Mostly clear | 12° | 9° | 0% | 73% | 21 km/h | |
| Mostly clear | 12° | 8° | 0% | 75% | 21 km/h | |
| Mostly clear | 12° | 8° | 0% | 79% | 20 km/h | |
| Partly cloudy | 11° | 8° | 0% | 81% | 18 km/h | |
| Overcast | 12° | 9° | 0% | 76% | 18 km/h | |
| Overcast | 12° | 9° | 0% | 76% | 13 km/h | |
| Overcast | 12° | 9° | 0% | 76% | 10 km/h | |
| Overcast | 11° | 9° | 1% | 75% | 9 km/h | |
| Overcast | 11° | 9° | 1% | 78% | 9 km/h | |
Summary
Over the next 48 hours in O'Fallon, temperatures range from 7–18°C. The highest chance of rain is 94%, around 21:00 on Tuesday (local time).
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
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