United States · 1991–2020 normal
Ontario in
December.
Typical December weather in Ontario: 3.4°C by day, -4.1°C at night, 88 mm of rain over 12.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high3.4°C
Typical low-4.1°C
Rain88 mm
Wet days12.8
Comfort score 5 this month (June leads the year at 81). Daylight is calculated as 9 h from latitude 43.22°. Open-water sea temperature is 6.5°C (19 km from the place centre).
Event window
Frost-level nights in December
The measured night-time normal is -4.1°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5129887
- NOAA station
- USC00307842 · SODUS 1W
- Station distance
- 16.2 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.