Climate averages 1991–2020
Newmarket weather
in December.
A cold month with moderate precipitation: the 10th warmest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Newmarket: daytime highs average 0.5°C and nights cool to about -6.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 57 mm of precipitation on roughly 10 days, which makes December a month with moderate precipitation (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 57 min on an average December day.
The nearest other city in this atlas is Richmond Hill (20 km away). In December its highs average 1.1°C, 0.6°C warmer than Newmarket, with 61 mm of precipitation.
Among the 86 cities listed in Canada, Newmarket ranks 47th of 86 for the warmest December highs and 16th of 86 for the driest December (precipitation, lowest first). The mean December high of those 86 cities is 0.2°C; Newmarket is 0.3°C warmer than that mean.
From December to January, average highs fall by 3.1°C to -2.6°C, and monthly precipitation stays at 57 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
Newmarket climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.6°C-11.3°C | -11.3°C | 57 | 10.1 | 9.39 h |
| February | -1.6°C-11.3°C | -11.3°C | 47 | 8.0 | 10.410 h |
| March | 3.7°C-6.0°C | -6.0°C | 56 | 10.1 | 11.912 h |
| April | 11.0°C1.0°C | 1.0°C | 77 | 11.4 | 13.413 h |
| May | 18.4°C7.9°C | 7.9°C | 80 | 11.2 | 14.715 h |
| June | 23.4°C13.7°C | 13.7°C | 88 | 11.2 | 15.415 h |
| July | 25.8°C16.5°C | 16.5°C | 84 | 10.7 | 15.115 h |
| August | 24.7°C15.9°C | 15.9°C | 78 | 9.6 | 14.014 h |
| September | 20.8°C12.2°C | 12.2°C | 73 | 9.1 | 12.613 h |
| October | 13.5°C6.0°C | 6.0°C | 75 | 11.0 | 11.011 h |
| November | 6.3°C-0.4°C | -0.4°C | 68 | 10.2 | 9.710 h |
| December, selected | 0.5°C-6.4°C | -6.4°C | 57 | 9.9 | 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
- Richmond Hill in DecemberCanada · 20 kmHigh 1.1°C · Low -5.3°C · 61 mm precipitation
- Vaughan in DecemberCanada · 24 kmHigh 1.3°C · Low -4.8°C · 61 mm precipitation
- Markham in DecemberCanada · 26 kmHigh 1.5°C · Low -4.8°C · 81 mm precipitation
- Thornhill in DecemberCanada · 26 kmHigh 1.7°C · Low -4.0°C · 61 mm precipitation
- Pickering in DecemberCanada · 31 kmHigh 1.0°C · Low -4.9°C · 62 mm precipitation
- Toronto in DecemberCanada · 39 kmHigh 1.9°C · Low -3.4°C · 61 mm precipitation
- Ajax in DecemberCanada · 41 kmHigh 1.7°C · Low -4.0°C · 87 mm precipitation
- Barrie in DecemberCanada · 42 kmHigh -0.1°C · Low -6.5°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 Newmarket) is explained once on the Newmarket year overview and on the Sources, method and limits page.