Weather in O Fallon in September
day
+75
evening
+72
Average September daytime temperature in O Fallon is +75°F, night +72°F. This data was obtained from our O Fallon weather archive.
- Cloudy
- clear - 12 days Overcast - 18 days
- Wind
- average wind speed is 8.9 mph
- Pressure
- 29.4 inHg
- Precipitation
- rain / snow / hail - 2 days
Weather archive by month and season
Average weather in O Fallon in September by year
Average day and night temperature in O Fallon in September data for the period from 2009 to 2012 years. Number of cloudy and clear days, atmospheric pressure and wind speed.
- 2012
- 2011
- 2010
- 2009
| Temperature °F | Weather characteristics | Pressure inHg | Wind speed mph |
| Day | +75 |
| 29.4 | 8.9 | |
| Evening | +73 |
| 29.4 | 8.9 |
| Day | +73 |
| 29.4 | 8.9 | |
| Evening | +70 |
| 29.4 | 8.9 |
| Day | +77 |
| 29.4 | 8.9 | |
| Evening | +75 |
| 29.4 | 8.9 |
| Day | +72 |
| 29.4 | 11.2 | |
| Evening | +70 |
| 29.4 | 6.7 |
Weather archive in O Fallon in September
Graph shows the average in September temperature in O Fallon in the evening and daytime. The maximum average daily temperature according to our archive was +77°F and the minimum dropped to a +72°F
Weather characteristics
Precipitation in September
Graph displays the average number of rainy or snowy days in O Fallon over the years. Total average number of days on our data is 2 days.
Minimum and maximum
world's temperature today
world's temperature today
Russia
Mys Shmidta
Mys Shmidta
- day
- +30°F
- night
- +9°F
Sudan
Wad Madani
Wad Madani
- day
- +117°F
- night
- +91°F
O Fallon
The hottest months:
- July
- +93 °F
- August
- +88 °F
- June
- +86 °F
The coldest months:
- January
- +36 °F
- December
- +41 °F
- February
- +43 °F
Most precipitations:
- January
- 5 D
- December
- 5 D
- March
- 3 D
Most windy months mph:
- February
- 13.4 mph
- March
- 13.4 mph
- May
- 13.4 mph
Most sunny months days:
- November
- 9 D
- August
- 8 D
- October
- 8 D
Temperature units
°F°C
Icons