Climate averages 1991–2020
Ajax weather
in October.
A cool, wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Ajax: daytime highs average 14.0°C and nights cool to about 8.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 95 mm of rain on roughly 12 days, which makes October a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 03 min on an average October day.
The nearest other city in this atlas is Whitby (9 km away). In October its highs average 14.0°C, about as warm as Ajax, with 83 mm of rain.
Among the 86 cities listed in Canada, Ajax ranks joint 13th of 86 for the warmest October highs and 46th of 86 for the driest October (rainfall, lowest first). The mean October high of those 86 cities is 12.7°C; Ajax is 1.3°C warmer than that mean.
From October to November, average highs fall by 6.8°C to 7.2°C, and monthly rainfall falls from 95 mm to 92 mm.
The annual picture
October 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 | -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, selected | 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
October in nearby cities
- Whitby in OctoberCanada · 9 kmHigh 14.0°C · Low 8.2°C · 83 mm rain
- Pickering in OctoberCanada · 10 kmHigh 13.4°C · Low 7.2°C · 81 mm rain
- Oshawa in OctoberCanada · 16 kmHigh 13.9°C · Low 8.1°C · 83 mm rain
- Markham in OctoberCanada · 19 kmHigh 14.0°C · Low 7.1°C · 91 mm rain
- Thornhill in OctoberCanada · 32 kmHigh 14.0°C · Low 7.5°C · 75 mm rain
- Richmond Hill in OctoberCanada · 33 kmHigh 13.7°C · Low 6.5°C · 75 mm rain
- Toronto in OctoberCanada · 33 kmHigh 13.9°C · Low 8.0°C · 75 mm rain
- Vaughan in OctoberCanada · 37 kmHigh 13.8°C · Low 6.8°C · 75 mm rain
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.