United States · 1991–2020 normal
Williamstown in
December.
Typical December weather in Williamstown: 6.6°C by day, -2.5°C at night, 94 mm of rain over 10.6 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high6.6°C
Typical low-2.5°C
Rain94 mm
Wet days10.6
Comfort score 5 this month (September leads the year at 79). Daylight is calculated as 9 h 24 from latitude 39.40°.
Event window
Frost-level nights in December
The measured night-time normal is -2.5°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4827351
- NOAA station
- USC00334927 · MARIETTA WWTP
- Station distance
- 1.6 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.