United States · 1991–2020 normal
Helena Valley Northwest in
December.
Typical December weather in Helena Valley Northwest: 0.5°C by day, -9.9°C at night, 11 mm of rain over 3.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high0.5°C
Typical low-9.9°C
Rain11 mm
Wet days3.2
Comfort score 5 this month (June leads the year at 81). Daylight is calculated as 8 h 34 from latitude 46.73°.
Event window
Frost-level nights in December
The measured night-time normal is -9.9°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 7261422
- NOAA station
- USW00024144 · HELENA AP ASOS
- Station distance
- 14.9 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.