May Weather in Oshawa, Canada

Last updated: June 18, 2025

The average temperature in Oshawa, Canada during May is a mild 13°C (56°F). However, temperatures can vary significantly, with a minimum of -3°C (27°F) and a maximum reaching 30°C (86°F). Expect 98 mm (3.9 in) of precipitation spread over approximately 13 days, contributing to an average humidity of 82%.

May Temperature in Oshawa

In May in Oshawa, the average temperature is 13°C (56°F). The maximum can reach 30°C (86°F), and the minimum can be as low as -3°C (27°F). Be prepared for a wide range of temperatures when traveling to Oshawa this month, so pack accordingly!

May Weather in Oshawa: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Oshawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oshawa, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°F).

Data source: Temperature data for Oshawa generated using information from the Copernicus Climate Change Service.

May Precipitation in Oshawa

In Oshawa in May, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.

May Precipitation Trends in Oshawa

The chart displays monthly precipitation patterns in Oshawa, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Oshawa, May typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Oshawa

In Oshawa in May, humidity is 82%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it feel much cooler than it is and creating a heavy atmosphere that can be exhausting for travelers.

May Average Humidity in Oshawa

This chart illustrates the average monthly humidity levels in Oshawa, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Oshawa is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Oshawa

In Oshawa in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Oshawa.

Maximum UV Index Levels in Oshawa for May

The chart shows the monthly maximum UV Index (UVI) for Oshawa in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Oshawa typically reaches 9, which falls under the very high exposure category.

Data source: Oshawa May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Oshawa Compares to Other Months

Weather in Oshawa varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Oshawa, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oshawa, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	65 mm (2.5 inches)	91%	low
February Weather	-4°C (24°F)	69 mm (2.7 inches)	91%	moderate
March Weather	0°C (32°F)	62 mm (2.4 inches)	88%	moderate
April Weather	6°C (43°F)	112 mm (4.4 inches)	88%	very high
May Weather	13°C (56°F)	98 mm (3.9 inches)	82%	very high
June Weather	19°C (66°F)	90 mm (3.5 inches)	79%	very high
July Weather	22°C (72°F)	92 mm (3.6 inches)	77%	very high
August Weather	21°C (70°F)	108 mm (4.2 inches)	72%	very high
September Weather	17°C (63°F)	73 mm (2.9 inches)	76%	high
October Weather	11°C (51°F)	99 mm (3.9 inches)	83%	moderate
November Weather	3°C (37°F)	83 mm (3.2 inches)	88%	moderate
December Weather	-2°C (29°F)	75 mm (2.9 inches)	87%	low