Climate averages 1991–2020
Ajax weather
in January.
A freezing month with moderate precipitation: the coolest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a freezing month in Ajax: daytime highs average -1.5°C and nights cool to about -8.8°C. By daytime temperature it is the coolest month of the year.
Expect about 86 mm of precipitation on roughly 13 days, which makes January a month with moderate precipitation (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 19 min on an average January day.
The nearest other city in this atlas is Whitby (9 km away). In January its highs average -1.5°C, about as warm as Ajax, with 64 mm of precipitation.
Among the 86 cities listed in Canada, Ajax ranks joint 34th of 86 for the warmest January highs and 67th of 86 for the driest January (precipitation, lowest first). The mean January high of those 86 cities is -2.3°C; Ajax is 0.8°C warmer than that mean.
From January to February, average highs rise by 0.5°C to -1.0°C, and monthly precipitation falls from 86 mm to 61 mm.
The annual picture
January 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
Ajax climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | -1.5°C-8.8°C | -8.8°C | 86 | 12.5 | 9.39 h |
| February | -1.0°C-9.1°C | -9.1°C | 61 | 9.1 | 10.410 h |
| March | 3.5°C-4.3°C | -4.3°C | 70 | 10.1 | 11.912 h |
| April | 10.0°C2.2°C | 2.2°C | 96 | 11.0 | 13.413 h |
| May | 16.5°C8.8°C | 8.8°C | 78 | 10.1 | 14.715 h |
| June | 22.1°C14.8°C | 14.8°C | 76 | 9.7 | 15.415 h |
| July | 25.4°C18.1°C | 18.1°C | 67 | 8.9 | 15.115 h |
| August | 24.8°C17.9°C | 17.9°C | 67 | 8.8 | 14.014 h |
| September | 21.0°C14.3°C | 14.3°C | 85 | 9.1 | 12.613 h |
| October | 14.0°C8.1°C | 8.1°C | 95 | 12.1 | 11.111 h |
| November | 7.2°C1.7°C | 1.7°C | 92 | 11.4 | 9.710 h |
| December | 1.7°C-4.0°C | -4.0°C | 87 | 12.7 | 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
January in nearby cities
- Whitby in JanuaryCanada · 9 kmHigh -1.5°C · Low -8.5°C · 64 mm precipitation
- Pickering in JanuaryCanada · 10 kmHigh -2.2°C · Low -9.5°C · 62 mm precipitation
- Oshawa in JanuaryCanada · 16 kmHigh -1.5°C · Low -8.4°C · 65 mm precipitation
- Markham in JanuaryCanada · 19 kmHigh -1.7°C · Low -9.5°C · 81 mm precipitation
- Thornhill in JanuaryCanada · 32 kmHigh -1.4°C · Low -8.6°C · 60 mm precipitation
- Richmond Hill in JanuaryCanada · 33 kmHigh -2.0°C · Low -10.1°C · 60 mm precipitation
- Toronto in JanuaryCanada · 33 kmHigh -1.3°C · Low -7.9°C · 60 mm precipitation
- Vaughan in JanuaryCanada · 37 kmHigh -1.8°C · Low -9.4°C · 60 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 Ajax) is explained once on the Ajax year overview and on the Sources, method and limits page.