United States · 1991–2020 normal
Mount Vernon in
September.
Typical September weather in Mount Vernon: 27.2°C by day, 12.8°C at night, 137 mm of rain over 6.5 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high27.2°C
Typical low12.8°C
Rain137 mm
Wet days6.5
Comfort score 68 this month (May leads the year at 73). Daylight is calculated as 12 h 22 from latitude 37.10°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4399605
- NOAA station
- USC00235862 · MT VERNON UNIV MO - SW CTR
- Station distance
- 6.3 km from the place centre
- Coverage
- Good coverage · 22 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.