May Weather in Moncton, Canada

Last updated: June 18, 2025

In Moncton, Canada, the average temperature in May hovers around 10°C (50°F). However, be prepared for a range of conditions, as temperatures can dip to a chilly -3°C (27°F) or soar to a pleasant 28°C (82°F). Expect 104 mm (4.1 in) of precipitation over 13 days, contributing to an average humidity of 82%.

May Temperature in Moncton

In May in Moncton, the average temperature is 10°C (50°F), with maximums reaching up to 28°C (82°F) and minimums dropping as low as -3°C (27°F). This variability makes it essential for travelers to pack layers to stay comfortable in fluctuating temperatures.

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

The chart illustrates May temperature patterns in Moncton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Moncton, May typically has an average temperature of 10°C (50°F), with highs reaching up to 28°C (82°F) and lows dropping to around -3°C (27°F).

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

May Precipitation in Moncton

In Moncton in May, the precipitation amount is 104 mm (4.1 in) over the course of 13 days.

May Precipitation Trends in Moncton

The chart displays monthly precipitation patterns in Moncton, 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 Moncton, May typically receives around 104 mm (4.1 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 Moncton

In Moncton in May, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

May Average Humidity in Moncton

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

In Moncton 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 Moncton.

Maximum UV Index Levels in Moncton for May

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

Data source: Moncton 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 Moncton Compares to Other Months

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

This table compares monthly weather conditions in Moncton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	92 mm (3.6 inches)	82%	low
February Weather	-6°C (22°F)	101 mm (4.0 inches)	83%	moderate
March Weather	-2°C (28°F)	78 mm (3.1 inches)	82%	moderate
April Weather	4°C (40°F)	91 mm (3.6 inches)	82%	high
May Weather	10°C (50°F)	104 mm (4.1 inches)	82%	very high
June Weather	16°C (60°F)	97 mm (3.8 inches)	84%	very high
July Weather	19°C (67°F)	82 mm (3.2 inches)	86%	very high
August Weather	19°C (67°F)	72 mm (2.8 inches)	85%	very high
September Weather	15°C (59°F)	90 mm (3.5 inches)	83%	high
October Weather	9°C (48°F)	80 mm (3.2 inches)	83%	moderate
November Weather	2°C (37°F)	145 mm (5.7 inches)	85%	moderate
December Weather	-3°C (26°F)	103 mm (4.0 inches)	83%	low