United States · 1991–2020 normal
Mount Vernon in
September.
Typical September weather in Mount Vernon: 30.9°C by day, 18.2°C at night, 91 mm of rain over 5.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high30.9°C
Typical low18.2°C
Rain91 mm
Wet days5.3
Comfort score 62 this month (April leads the year at 80). Daylight is calculated as 12 h 20 from latitude 33.19°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4713032
- NOAA station
- USC00416119 · MT VERNON
- Station distance
- 0.9 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.