United States · 1991–2020 normal
Mount Vernon in
December.
Typical December weather in Mount Vernon: 8.3°C by day, -3.8°C at night, 65 mm of rain over 5.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high8.3°C
Typical low-3.8°C
Rain65 mm
Wet days5.9
Comfort score 8 this month (May leads the year at 73). Daylight is calculated as 9 h 37 from latitude 37.10°.
Event window
Frost-level nights in December
The measured night-time normal is -3.8°C, so frost is typical rather than exceptional this month.
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.