Oshawa weather in July
In July, Oshawa has daytime highs averaging 25 °C, nights around 18 °C, with 11 wet days. Figures are 1991–2020 climate normals.
- 25.2°C Average high
- 18.1°C Average low
- 11days Wet days
- 82mm Rainfall
- 15h Daylight
Daily temperatures through July
How July 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 July | 24.6 °C | 17.4 °C | 32 % |
| 11–20 July | 25.4 °C | 18.4 °C | 34 % |
| 21–31 July | 25.3 °C | 18.5 °C | 34 % |
What to expect
| Measure | Typical July | Share of the month |
|---|---|---|
| Days above 25 °C | 15 of 31 | 49 % |
| Days above 30 °C | 1.2 of 31 | 4 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 11 of 31 | 34 % |
Conditions in July
| Measure | Average |
|---|---|
| Mean temperature | 22 °C |
| Record high (1991–2020) | 34 °C |
| Record low (1991–2020) | 11 °C |
| Relative humidity | 72 % |
| Wind speed | 17 km/h |
| Cloud cover | 51 % |
Where Oshawa ranks in July
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in North America in July | 38th of 50 | 83/100 |
July compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| May | 16.4 °C | 76 mm | 60 % |
| June | 21.9 °C | 88 mm | 57 % |
| July | 25.2 °C | 82 mm | 51 % |
| August | 24.7 °C | 76 mm | 50 % |
| September | 21.0 °C | 80 mm | 52 % |
See all twelve months for Oshawa
- July is the warmest month in Oshawa.
- It is the 9th driest month of the year.
- It ranks 2nd for least cloud cover.
- Days last about 15 hours from sunrise to sunset.
- It rains on 11 of 31 days — 34 % of the month.
- Nights are about 7.0 °C cooler than the middle of the day.
- The hottest July day on record since 1991 reached 34 °C, 8.4 °C above the usual daytime high.
QuestionsJuly in Oshawa, answered
How warm is Oshawa in July?
Daily highs average 25 °C and nights fall to about 18 °C, a spread of 7.0 °C between afternoon and dawn. That makes July the 1st warmest month of the year here.
Does it rain much in Oshawa in July?
July averages 82 mm of rain, spread over about 11 of the 31 days — 34 % of the month. Cloud cover averages 51 % of the sky.
How long are the days in July?
Oshawa averages 15 hours between sunrise and sunset in July. 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.