May Weather in Dorchester, Canada

Last updated: June 18, 2025

In May, the average temperature in Dorchester, Canada is a mild 14°C (57°F). However, be prepared for a range of temperatures, with minimums dropping to -4°C (25°F) and maximums soaring to 31°C (89°F). Expect 102 mm (4.0 in) of precipitation over approximately 13 days, contributing to an average humidity level of 82%. Enjoy the variability of the season!

May Temperature in Dorchester

In May in Dorchester, the average temperature is 14°C (57°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as -4°C (25°F). This diverse range in temperatures makes Dorchester a destination where travelers should prepare for both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Dorchester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dorchester, May typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (89°F) and lows dropping to around -4°C (25°F).

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

May Precipitation in Dorchester

In Dorchester in May, precipitation amounts to 102 mm (4.0 in) over the course of 13 days.

May Precipitation Trends in Dorchester

The chart displays monthly precipitation patterns in Dorchester, 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 Dorchester, May typically receives around 102 mm (4.0 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 Dorchester

In Dorchester in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

May Average Humidity in Dorchester

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

In Dorchester 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 Dorchester.

Maximum UV Index Levels in Dorchester for May

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

Data source: Dorchester 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 Dorchester Compares to Other Months

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

This table compares monthly weather conditions in Dorchester, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	76 mm (3.0 inches)	90%	low
February Weather	-3°C (26°F)	79 mm (3.1 inches)	90%	moderate
March Weather	1°C (34°F)	78 mm (3.1 inches)	87%	moderate
April Weather	6°C (44°F)	109 mm (4.3 inches)	87%	very high
May Weather	14°C (57°F)	102 mm (4.0 inches)	82%	very high
June Weather	19°C (67°F)	104 mm (4.1 inches)	81%	very high
July Weather	22°C (72°F)	95 mm (3.7 inches)	79%	very high
August Weather	21°C (70°F)	96 mm (3.8 inches)	80%	very high
September Weather	17°C (63°F)	83 mm (3.2 inches)	81%	very high
October Weather	11°C (52°F)	120 mm (4.7 inches)	84%	moderate
November Weather	3°C (38°F)	87 mm (3.4 inches)	88%	moderate
December Weather	-1°C (31°F)	74 mm (2.9 inches)	87%	low