United States · 1991–2020 normal
Mount Vernon in
December.
Typical December weather in Mount Vernon: 8°C by day, -1.7°C at night, 114 mm of rain over 10.4 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high8°C
Typical low-1.7°C
Rain114 mm
Wet days10.4
Comfort score 5 this month (September leads the year at 79). Daylight is calculated as 9 h 36 from latitude 37.35°.
Event window
Frost-level nights in December
The measured night-time normal is -1.7°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4301703
- NOAA station
- USC00155648 · MT VERNON
- Station distance
- 0.4 km from the place centre
- Coverage
- Strong coverage · 25 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.