United States · 1991–2020 normal
Portland in
December.
Typical December weather in Portland: 3.9°C by day, -4.7°C at night, 62 mm of rain over 7.6 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high3.9°C
Typical low-4.7°C
Rain62 mm
Wet days7.6
Comfort score 5 this month (September leads the year at 83). Daylight is calculated as 9 h 18 from latitude 40.43°.
Event window
Frost-level nights in December
The measured night-time normal is -4.7°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4925037
- NOAA station
- USC00127069 · PORTLAND 1 SW
- Station distance
- 2.3 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.