United States · 1991–2020 normal
Santa Rosa in
December.
Typical December weather in Santa Rosa: 12.4°C by day, -3.9°C at night, 20 mm of rain over 2.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high12.4°C
Typical low-3.9°C
Rain20 mm
Wet days2.9
Comfort score 28 this month (October leads the year at 82). Daylight is calculated as 9 h 49 from latitude 34.94°.
Event window
Frost-level nights in December
The measured night-time normal is -3.9°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5490338
- NOAA station
- USC00298107 · SANTA ROSA
- Station distance
- 4.1 km from the place centre
- Coverage
- Good coverage · 18 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.