United States · 1991–2020 normal
Helena in
December.
Typical December weather in Helena: 8.9°C by day, -3.7°C at night, 37 mm of rain over 3.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high8.9°C
Typical low-3.7°C
Rain37 mm
Wet days3.8
Comfort score 16 this month (September leads the year at 75). Daylight is calculated as 9 h 40 from latitude 36.55°.
Event window
Frost-level nights in December
The measured night-time normal is -3.7°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4538544
- NOAA station
- USC00344019 · HELENA 1 SSE
- Station distance
- 1 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.