May Weather in Oakville, United States

Last updated: June 24, 2025

In May, the average temperature in Oakville, United States is a comfortable 12°C (55°F). You can expect a minimum of 2°C (36°F) and a pleasant maximum of 29°C (85°F). Be prepared for some rain, as 75 mm (2.9 in) of precipitation can occur over 11 days. With an average humidity of 84%, the air feels quite moist, adding to the overall ambiance of the season.

May Temperature in Oakville

In May in Oakville, the average temperature is 12°C (55°F). Maximums can reach 29°C (85°F), while minimums can drop as low as 2°C (36°F). This makes it an ideal time for travelers to experience a pleasant mix of warmth and coolness, perfect for exploring the sights.

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

The chart illustrates May temperature patterns in Oakville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oakville, May typically has an average temperature of 12°C (55°F), with highs reaching up to 29°C (85°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Oakville

In Oakville in May, the precipitation amount is 75 mm (2.9 in) over the course of 11 days.

May Precipitation Trends in Oakville

The chart displays monthly precipitation patterns in Oakville, 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 Oakville, May typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Oakville

In Oakville in May, humidity is 84%. With an average temperature of 12°C (55°F), this humidity feels like a thick blanket wrapping around you, making it a challenge for traveling as you might feel sticky and uncomfortable while exploring the sights.

May Average Humidity in Oakville

This chart illustrates the average monthly humidity levels in Oakville, 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 Oakville is approximately 84%, 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 Oakville

In Oakville 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 Oakville.

Maximum UV Index Levels in Oakville for May

The chart shows the monthly maximum UV Index (UVI) for Oakville 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 Oakville typically reaches 9, which falls under the very high exposure category.

Data source: Oakville 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 Oakville Compares to Other Months

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

This table compares monthly weather conditions in Oakville, 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 (41°F)	205 mm (8.1 inches)	86%	low
February Weather	4°C (40°F)	171 mm (6.7 inches)	84%	moderate
March Weather	6°C (44°F)	142 mm (5.6 inches)	85%	moderate
April Weather	9°C (49°F)	122 mm (4.8 inches)	83%	high
May Weather	12°C (55°F)	75 mm (2.9 inches)	84%	very high
June Weather	15°C (59°F)	57 mm (2.2 inches)	84%	very high
July Weather	17°C (63°F)	11 mm (0.4 inches)	82%	very high
August Weather	18°C (64°F)	13 mm (0.5 inches)	73%	very high
September Weather	15°C (60°F)	90 mm (3.5 inches)	74%	high
October Weather	10°C (50°F)	137 mm (5.4 inches)	83%	moderate
November Weather	7°C (45°F)	198 mm (7.8 inches)	86%	moderate
December Weather	4°C (40°F)	210 mm (8.3 inches)	87%	low