Annual mean 9°C · wettest around April · prevailing wind SW
Warmest
25.1 °C
Coldest
-3.4 °C
Wettest
23%
Windiest
5.2 m/s
Prevailing
SW
4.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Oshawa over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -5°C. Oshawa has no sharply defined rainy season: the chance of rain on a given day runs from 11% in August, the driest month, to 18% in April, the wettest. Winds in Oshawa are highest in March, averaging 4.1 m/s (15 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Oshawa come in July, when the sky is typically 32% covered; December is the cloudiest month, at 67%.
Month by month Oshawa climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-3°C
-5°C
-9°C
13%
65%
3.9 m/s
0
0
0
February
-1°C
-5°C
-7°C
14%
60%
4.0 m/s
0
0
2
March
3°C
-2°C
-3°C
14%
52%
4.1 m/s
0
0
8
April
8°C
3°C
3°C
18%
50%
3.9 m/s
5
0
30
May
16°C
10°C
13°C
14%
41%
3.2 m/s
36
6
66
June
21°C
16°C
20°C
13%
38%
3.1 m/s
70
20
65
July
25°C
19°C
25°C
11%
32%
2.7 m/s
73
49
36
August
24°C
18°C
24°C
11%
33%
2.7 m/s
73
47
39
September
21°C
14°C
20°C
11%
35%
2.8 m/s
67
22
65
October
14°C
9°C
10°C
14%
50%
3.2 m/s
28
2
60
November
6°C
2°C
1°C
14%
59%
3.6 m/s
3
0
20
December
0°C
-2°C
-5°C
16%
67%
3.7 m/s
0
0
3
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Oshawa weather by season
Year round, Oshawa has days of about -3°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -5°C to 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around April and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Oshawa weather in winterDecember to February
High -1°CLow -4°CRain 14%
Winter in Oshawa has typical daily highs of about -1°C and lows of about -4°C, with a 14% chance of rain on a given day.
Oshawa weather in springMarch to May
High 9°CLow 4°CRain 16%
Spring in Oshawa has typical daily highs of about 9°C and lows of about 4°C, with a 16% chance of rain on a given day.
Oshawa weather in summerJune to August
High 24°CLow 17°CRain 12%
Summer in Oshawa has typical daily highs of about 24°C and lows of about 17°C, with a 12% chance of rain on a given day.
Oshawa weather in autumnSeptember to November
High 14°CLow 8°CRain 13%
Autumn in Oshawa has typical daily highs of about 14°C and lows of about 8°C, with a 13% chance of rain on a given day.
When is the rainy season in Oshawa?
Oshawa has no sharply defined rainy season: the chance of rain on a given day runs from 11% in August, the driest month, to 18% in April, the wettest.
What time of year is Oshawa windiest?
Winds in Oshawa are highest in March, averaging 4.1 m/s (15 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Oshawa year round?
The average temperature in Oshawa over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -5°C.