Oshawa weather in October
In October, Oshawa has daytime highs averaging 14 °C, nights around 8.4 °C, with 11 wet days. Figures are 1991–2020 climate normals.
- 14.1°C Average high
- 8.4°C Average low
- 11days Wet days
- 85mm Rainfall
- 11h Daylight
Daily temperatures through October
How October develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 October | 16.8 °C | 10.7 °C | 35 % |
| 11–20 October | 14.3 °C | 8.6 °C | 37 % |
| 21–31 October | 11.7 °C | 6.3 °C | 37 % |
- Average highs fall from 16.8 °C early in October to 11.7 °C by the end of it.
What to expect
| Measure | Typical October | Share of the month |
|---|---|---|
| Days above 25 °C | 0.1 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0.3 of 31 | 1 % |
| Days with more than 1 mm rain | 11 of 31 | 36 % |
Conditions in October
| Measure | Average |
|---|---|
| Mean temperature | 11 °C |
| Record high (1991–2020) | 26 °C |
| Record low (1991–2020) | -3.5 °C |
| Relative humidity | 73 % |
| Wind speed | 20 km/h |
| Cloud cover | 61 % |
Where Oshawa ranks in October
| Ranking | Position | Value |
|---|---|---|
| The coolest places in North America in October | 23rd of 50 | 14 °C |
October compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| August | 24.7 °C | 76 mm | 50 % |
| September | 21.0 °C | 80 mm | 52 % |
| October | 14.1 °C | 85 mm | 61 % |
| November | 7.4 °C | 73 mm | 69 % |
| December | 2.0 °C | 69 mm | 74 % |
See all twelve months for Oshawa
- October is the 6th warmest month here.
- It is the 11th driest month of the year.
- It ranks 6th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 11 of 31 days — 36 % of the month.
- Nights are about 5.7 °C cooler than the middle of the day.
- The hottest October day on record since 1991 reached 26 °C, 12 °C above the usual daytime high.
QuestionsOctober in Oshawa, answered
How warm is Oshawa in October?
Daily highs average 14 °C and nights fall to about 8.4 °C, a spread of 5.7 °C between afternoon and dawn. That makes October the 6th warmest month of the year here.
Does it rain much in Oshawa in October?
October averages 85 mm of rain, spread over about 11 of the 31 days — 36 % of the month. Cloud cover averages 61 % of the sky.
How long are the days in October?
Oshawa averages 11 hours between sunrise and sunset in October. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.