United States · 1991–2020 normal
Westmont in
December.
Typical December weather in Westmont: 3.7°C by day, -5.3°C at night, 49 mm of rain over 6.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high3.7°C
Typical low-5.3°C
Rain49 mm
Wet days6.8
Comfort score 5 this month (September leads the year at 79). Daylight is calculated as 9 h 09 from latitude 41.80°. Open-water sea temperature is 5.6°C (30 km from the place centre).
Event window
Frost-level nights in December
The measured night-time normal is -5.3°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4916207
- NOAA station
- USC00119221 · WHEATON 3 SE
- Station distance
- 8.3 km from the place centre
- Coverage
- Good coverage · 16 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.