United States · 1991–2020 normal
Janesville in
December.
Typical December weather in Janesville: 5.8°C by day, -5.2°C at night, 74 mm of rain over 6.4 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high5.8°C
Typical low-5.2°C
Rain74 mm
Wet days6.4
Comfort score 5 this month (June leads the year at 80). Daylight is calculated as 9 h 19 from latitude 40.30°.
Event window
Frost-level nights in December
The measured night-time normal is -5.2°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5565862
- NOAA station
- USC00048702 · SUSANVILLE 2SW
- Station distance
- 17.8 km from the place centre
- Coverage
- Good coverage · 22 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.