Measurements:
°C
°F
Oshawa
46°F
S 13 mph
Feels like: 42°F
Precip: 0%
World Resorts Canada Oshawa Weather May Weather in Oshawa

Oshawa Weather: May

Average Day Temperature: 60.1°F
Average Night Temperature: 48.3°F
Sea Water Temperature: 45.4°F
Number of Sunny Days: 11 days
Sunshine Hours: 14.2 - 15.2 hours
Number of Rainy Days: 1 day
Precipitation Totals: 0.8 in

Air Temperature in May, °F

Select Year: 2026 2025 2024

The highest day temperature in May 2026 was 85°F. The lowest night temperature was 30°F. The average values for day and night temperatures during May were 61.9°F и 46.2°F respectivly.

Oshawa Water Sea Temperature in May, °F

Select Year: 2026 2025 2024

The average sea surface temperature in May 2026 for Oshawa was 41.1°F. The maximum and minimum values were 38.8°F and 46.2°F respectively.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in May, in

Precipitation total in May for Oshawa is 0.8 in.

Wind Speed in May, mph

The average wind speed in May is 8.7 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Oshawa in May is 8.2 hours.

Best Time to Visit Oshawa
The most sunny months:
September 15 days
August 14 days
July 12 days
The most warm months:
July 79.0 °F
August 78.1 °F
June 72.0 °F
Warmest sea temperature:
August 72.9 °F
September 69.3 °F
July 69.0 °F
The most cold months:
January 24.0 °F
February 25.1 °F
December 31.8 °F
The most rainy months:
July 3 days
April 2 days
March 2 days
The most windy months:
December 11 mph
November 11 mph
January 11 mph

Oshawa on the Weather Map

24 Hours Weather Forecast
Oshawa
Local time: 03:31
30 may, saturday
0600 46°F
S
15 mph
0900 56°F
S
14 mph
1200 62°F
SW
9 mph
1500 62°F
SW
4 mph
1800 60°F
NE
1 mph
2100 52°F
E
6 mph
31 may, sunday
0000 48°F
SE
7 mph
0300 48°F
SE
6 mph