May Weather in Chatham, Canada

Last updated: June 18, 2025

In May, the average temperature in Chatham, Canada hovers around 14°C (58°F). Temperatures can dip as low as -2°C (29°F) and soar to a maximum of 32°C (89°F). Expect quite a bit of rain, with 104 mm (4.1 in) of precipitation over approximately 15 days. The air tends to be quite humid, with an average humidity of 82%, making for a distinctly moist atmosphere.

May Temperature in Chatham

In May in Chatham, the average temperature is 14°C (58°F). Maximums can reach 32°C (89°F), while minimums can dip as low as -2°C (29°F). This variation in temperature makes it essential for travelers to pack accordingly, ensuring they are prepared for both warm and chilly conditions.

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

The chart illustrates May temperature patterns in Chatham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chatham, May typically has an average temperature of 14°C (58°F), with highs reaching up to 32°C (89°F) and lows dropping to around -2°C (29°F).

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

May Precipitation in Chatham

In Chatham in May, the precipitation amount is 104 mm (4.1 in) over a span of 15 days.

May Precipitation Trends in Chatham

The chart displays monthly precipitation patterns in Chatham, 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 Chatham, May typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 15 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 Chatham

In Chatham in May, humidity is 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

May Average Humidity in Chatham

This chart illustrates the average monthly humidity levels in Chatham, 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 Chatham 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 Chatham

In Chatham 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 Chatham.

Maximum UV Index Levels in Chatham for May

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

Data source: Chatham 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 Chatham Compares to Other Months

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

This table compares monthly weather conditions in Chatham, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (28°F)	67 mm (2.6 inches)	90%	low
February Weather	-2°C (29°F)	69 mm (2.7 inches)	90%	moderate
March Weather	2°C (36°F)	71 mm (2.8 inches)	87%	moderate
April Weather	8°C (46°F)	96 mm (3.8 inches)	87%	very high
May Weather	14°C (58°F)	104 mm (4.1 inches)	82%	very high
June Weather	21°C (69°F)	96 mm (3.8 inches)	81%	very high
July Weather	23°C (74°F)	95 mm (3.8 inches)	79%	very high
August Weather	22°C (73°F)	83 mm (3.2 inches)	80%	very high
September Weather	19°C (66°F)	76 mm (3.0 inches)	81%	very high
October Weather	13°C (55°F)	108 mm (4.2 inches)	84%	high
November Weather	5°C (40°F)	80 mm (3.2 inches)	88%	moderate
December Weather	1°C (33°F)	64 mm (2.5 inches)	87%	low