Climate averages 1991–2020
Hamilton weather
in December.
A cold, moderately wet month: the 10th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Hamilton: daytime highs average 2.5°C and nights cool to about -2.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 71 mm of rain on roughly 11 days, which makes December a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 03 min on an average December day.
The nearest other city in this atlas is Stoney Creek (8 km away). In December its highs average 2.5°C, about as warm as Hamilton, with 71 mm of rain.
Among the 86 cities listed in Canada, Hamilton ranks joint 18th of 86 for the warmest December highs and joint 41st of 86 for the driest December (rainfall, lowest first). The mean December high of those 86 cities is 0.2°C; Hamilton is 2.3°C warmer than that mean.
From December to January, average highs fall by 3.1°C to -0.6°C, and monthly precipitation stays at 71 mm.
The annual picture
December in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hamilton climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.6°C-7.0°C | -7.0°C | 71 | 11.3 | 9.49 h |
| February | -0.3°C-7.5°C | -7.5°C | 57 | 8.6 | 10.510 h |
| March | 3.8°C-3.4°C | -3.4°C | 69 | 9.9 | 11.912 h |
| April | 9.8°C2.7°C | 2.7°C | 94 | 11.4 | 13.413 h |
| May | 17.0°C9.6°C | 9.6°C | 83 | 11.2 | 14.715 h |
| June | 22.9°C15.9°C | 15.9°C | 86 | 11.5 | 15.315 h |
| July | 26.2°C19.1°C | 19.1°C | 77 | 10.0 | 15.015 h |
| August | 25.4°C18.7°C | 18.7°C | 69 | 9.4 | 14.014 h |
| September | 21.6°C15.1°C | 15.1°C | 77 | 9.3 | 12.513 h |
| October | 14.6°C8.9°C | 8.9°C | 85 | 11.0 | 11.111 h |
| November | 7.7°C2.7°C | 2.7°C | 79 | 10.3 | 9.810 h |
| December, selected | 2.5°C-2.5°C | -2.5°C | 71 | 10.6 | 9.09 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Stoney Creek in DecemberCanada · 8 kmHigh 2.5°C · Low -3.3°C · 71 mm rain
- Burlington in DecemberCanada · 15 kmHigh 2.0°C · Low -3.3°C · 70 mm rain
- Oakville in DecemberCanada · 26 kmHigh 2.4°C · Low -2.8°C · 70 mm rain
- Milton in DecemberCanada · 30 kmHigh 1.8°C · Low -4.0°C · 62 mm precipitation
- Brantford in DecemberCanada · 36 kmHigh 1.9°C · Low -4.5°C · 63 mm precipitation
- Cambridge, Canada in DecemberCanada · 39 kmHigh 1.1°C · Low -5.4°C · 63 mm precipitation
- Mississauga in DecemberCanada · 40 kmHigh 1.8°C · Low -4.0°C · 70 mm precipitation
- Guelph in DecemberCanada · 46 kmHigh 0.6°C · Low -5.9°C · 63 mm precipitation
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hamilton) is explained once on the Hamilton year overview and on the Sources, method and limits page.
Stoney Creek lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.