Climate averages 1991–2020
O'Fallon weather
in November.
A cool, moderately wet month: the 9th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
November is a cool month in O'Fallon: daytime highs average 12.0°C and nights cool to about 3.7°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 89 mm of rain on roughly 8 days, which makes November a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 06 min on an average November day.
The nearest other city in this atlas is St. Louis (48 km away). In November its highs average 12.3°C, about as warm as O'Fallon, with 93 mm of rain.
Among the 498 cities listed in the United States, O'Fallon ranks 306th of 498 for the warmest November highs and joint 405th of 498 for the driest November (rainfall, lowest first). The mean November high of those 498 cities is 15.2°C; O'Fallon is 3.2°C cooler than that mean.
From November to December, average highs fall by 6.0°C to 6.1°C, and monthly rainfall falls from 89 mm to 62 mm.
The annual picture
November in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
O'Fallon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.0°C-4.4°C | -4.4°C | 65 | 7.7 | 9.810 h |
| February | 6.8°C-2.6°C | -2.6°C | 61 | 7.7 | 10.711 h |
| March | 12.6°C2.6°C | 2.6°C | 92 | 10.6 | 11.912 h |
| April | 18.7°C8.5°C | 8.5°C | 114 | 11.3 | 13.213 h |
| May | 23.8°C14.3°C | 14.3°C | 123 | 13.3 | 14.314 h |
| June | 28.6°C19.3°C | 19.3°C | 101 | 11.0 | 14.815 h |
| July | 30.8°C21.6°C | 21.6°C | 82 | 9.9 | 14.615 h |
| August | 30.1°C20.9°C | 20.9°C | 76 | 9.1 | 13.714 h |
| September | 26.0°C16.7°C | 16.7°C | 81 | 7.6 | 12.512 h |
| October | 19.5°C10.4°C | 10.4°C | 84 | 8.4 | 11.211 h |
| November, selected | 12.0°C3.7°C | 3.7°C | 89 | 8.3 | 10.110 h |
| December | 6.1°C-1.7°C | -1.7°C | 62 | 7.8 | 9.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
November in nearby cities
- St. Louis in NovemberUnited States · 48 kmHigh 12.3°C · Low 3.6°C · 93 mm rain
- Columbia (Missouri), United States in NovemberUnited States · 142 kmHigh 11.7°C · Low 3.5°C · 79 mm rain
- Springfield (Illinois), United States in NovemberUnited States · 143 kmHigh 10.7°C · Low 2.4°C · 84 mm rain
- Decatur in NovemberUnited States · 189 kmHigh 10.5°C · Low 2.3°C · 88 mm rain
- Peoria (Illinois), United States in NovemberUnited States · 230 kmHigh 9.7°C · Low 2.0°C · 71 mm rain
- Bloomington (Illinois), United States in NovemberUnited States · 237 kmHigh 9.7°C · Low 1.6°C · 77 mm rain
- Champaign in NovemberUnited States · 256 kmHigh 10.2°C · Low 1.9°C · 83 mm rain
- Springfield (Missouri), United States in NovemberUnited States · 289 kmHigh 12.8°C · Low 4.0°C · 88 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for O'Fallon) is explained once on the O'Fallon year overview and on the Sources, method and limits page.