United States · 1991–2020 normal
Ottawa in
December.
Typical December weather in Ottawa: 6.8°C by day, -4.2°C at night, 43 mm of rain over 4.5 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high6.8°C
Typical low-4.2°C
Rain43 mm
Wet days4.5
Comfort score 6 this month (September leads the year at 74). Daylight is calculated as 9 h 29 from latitude 38.62°.
Event window
Frost-level nights in December
The measured night-time normal is -4.2°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4276816
- NOAA station
- USC00146128 · OTTAWA
- Station distance
- 1.2 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.