Climate averages 1991–2020
Oshawa weather
in October.
A cool, moderately wet month: the 6th warmest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Oshawa: daytime highs average 13.9°C and nights cool to about 8.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 83 mm of rain on roughly 11 days, which makes October a moderately wet month (the joint 9th 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 (7 km away). In October its highs average 14.0°C, about as warm as Oshawa, with 83 mm of rain.
Among the 86 cities listed in Canada, Oshawa ranks joint 17th of 86 for the warmest October highs and joint 32nd of 86 for the driest October (rainfall, lowest first). The mean October high of those 86 cities is 12.7°C; Oshawa is 1.2°C warmer than that mean.
From October to November, average highs fall by 6.7°C to 7.1°C, and monthly rainfall falls from 83 mm to 73 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
Oshawa 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-8.4°C | -8.4°C | 65 | 10.7 | 9.39 h |
| February | -1.2°C-8.5°C | -8.5°C | 52 | 8.3 | 10.410 h |
| March | 3.2°C-4.1°C | -4.1°C | 60 | 10.4 | 11.912 h |
| April | 9.6°C2.1°C | 2.1°C | 83 | 11.2 | 13.413 h |
| May | 16.1°C8.6°C | 8.6°C | 76 | 11.0 | 14.715 h |
| June | 21.7°C14.6°C | 14.6°C | 89 | 11.0 | 15.415 h |
| July | 25.1°C18.1°C | 18.1°C | 84 | 10.5 | 15.115 h |
| August | 24.6°C17.9°C | 17.9°C | 80 | 10.1 | 14.014 h |
| September | 20.8°C14.4°C | 14.4°C | 80 | 9.0 | 12.613 h |
| October, selected | 13.9°C8.1°C | 8.1°C | 83 | 11.4 | 11.011 h |
| November | 7.1°C1.9°C | 1.9°C | 73 | 10.2 | 9.710 h |
| December | 1.8°C-3.8°C | -3.8°C | 67 | 10.7 | 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 · 7 kmHigh 14.0°C · Low 8.2°C · 83 mm rain
- Ajax in OctoberCanada · 16 kmHigh 14.0°C · Low 8.1°C · 95 mm rain
- Pickering in OctoberCanada · 23 kmHigh 13.4°C · Low 7.2°C · 81 mm rain
- Markham in OctoberCanada · 34 kmHigh 14.0°C · Low 7.1°C · 91 mm rain
- Thornhill in OctoberCanada · 47 kmHigh 14.0°C · Low 7.5°C · 75 mm rain
- Richmond Hill in OctoberCanada · 47 kmHigh 13.7°C · Low 6.5°C · 75 mm rain
- Toronto in OctoberCanada · 49 kmHigh 13.9°C · Low 8.0°C · 75 mm rain
- Newmarket in OctoberCanada · 52 kmHigh 13.5°C · Low 6.0°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 Oshawa) is explained once on the Oshawa year overview and on the Sources, method and limits page.