May Weather in Markham, United States

Last updated: June 24, 2025

In Markham, United States, the average temperature in May hovers around 26°C (79°F), offering a pleasant climate for outdoor activities. However, be prepared for temperature fluctuations, with a minimum of 13°C (55°F) and a maximum reaching 34°C (94°F). Expect 137 mm (5.4 in) of precipitation over approximately 13 days, and enjoy the lush surroundings brought about by an average humidity of 79%.

May Temperature in Markham

In May in Markham, the average temperature is 26°C (79°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 13°C (55°F). This mild climate makes Markham an ideal destination for travelers seeking warm weather and outdoor adventures.

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

The chart illustrates May temperature patterns in Markham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Markham, May typically has an average temperature of 26°C (79°F), with highs reaching up to 34°C (94°F) and lows dropping to around 13°C (55°F).

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

May Precipitation in Markham

In Markham in May, the total precipitation amount reaches 137 mm (5.4 in) over the course of 13 days.

May Precipitation Trends in Markham

The chart displays monthly precipitation patterns in Markham, 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 Markham, May typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 13 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 Markham

In Markham in May humidity is 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

May Average Humidity in Markham

This chart illustrates the average monthly humidity levels in Markham, 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 Markham is approximately 79%, 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 Markham

In Markham in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Markham.

Maximum UV Index Levels in Markham for May

The chart shows the monthly maximum UV Index (UVI) for Markham 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 Markham typically reaches 11, which falls under the extreme exposure category.

Data source: Markham 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 Markham Compares to Other Months

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

This table compares monthly weather conditions in Markham, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	73 mm (2.9 inches)	78%	moderate
February Weather	15°C (60°F)	72 mm (2.8 inches)	81%	very high
March Weather	19°C (67°F)	70 mm (2.7 inches)	76%	very high
April Weather	22°C (72°F)	71 mm (2.8 inches)	79%	extreme
May Weather	26°C (79°F)	137 mm (5.4 inches)	79%	extreme
June Weather	28°C (83°F)	157 mm (6.2 inches)	74%	extreme
July Weather	29°C (84°F)	145 mm (5.7 inches)	71%	extreme
August Weather	29°C (85°F)	171 mm (6.7 inches)	68%	extreme
September Weather	27°C (81°F)	165 mm (6.5 inches)	73%	extreme
October Weather	23°C (74°F)	74 mm (2.9 inches)	75%	very high
November Weather	18°C (64°F)	78 mm (3.1 inches)	78%	high
December Weather	15°C (60°F)	90 mm (3.5 inches)	84%	moderate