United States · 1991–2020 normal
Portola in
December.
Typical December weather in Portola: 5.6°C by day, -7.1°C at night, 102 mm of rain over 7.5 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high5.6°C
Typical low-7.1°C
Rain102 mm
Wet days7.5
Comfort score 5 this month (June leads the year at 77). Daylight is calculated as 9 h 22 from latitude 39.81°.
Event window
Frost-level nights in December
The measured night-time normal is -7.1°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5384438
- NOAA station
- USC00047085 · PORTOLA
- Station distance
- 0.6 km from the place centre
- Coverage
- Strong coverage · 28 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.