May Weather in Shannon, Canada

Last updated: June 18, 2025

In May, the average temperature in Shannon, Canada hovers around 10°C (50°F). Expect chilly spells with minimums plummeting to -3°C (26°F), while heatwaves can soar up to 30°C (87°F). This month, be prepared for 114 mm (4.5 in) of precipitation spread over 16 days and experience a consistent average humidity of 79%.

May Temperature in Shannon

In May in Shannon, the average temperature is 10°C (50°F). Maximums can reach 30°C (87°F) and minimums can be as low as -3°C (26°F). Be prepared for a wide range of temperatures, making appropriate clothing essential for your travels.

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

The chart illustrates May temperature patterns in Shannon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shannon, May typically has an average temperature of 10°C (50°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (26°F).

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

May Precipitation in Shannon

In Shannon in May, the precipitation amount is 114 mm (4.5 in), occurring over a span of 16 days.

May Precipitation Trends in Shannon

The chart displays monthly precipitation patterns in Shannon, 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 Shannon, May typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 16 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 Shannon

In Shannon in May humidity is 79%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less inviting and requiring layered clothing to stay comfortable while traveling.

May Average Humidity in Shannon

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

In Shannon 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 Shannon.

Maximum UV Index Levels in Shannon for May

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

Data source: Shannon 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 Shannon Compares to Other Months

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

This table compares monthly weather conditions in Shannon, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	95 mm (3.7 inches)	95%	low
February Weather	-11°C (13°F)	94 mm (3.7 inches)	93%	moderate
March Weather	-5°C (22°F)	106 mm (4.2 inches)	90%	moderate
April Weather	2°C (36°F)	121 mm (4.8 inches)	87%	very high
May Weather	10°C (50°F)	114 mm (4.5 inches)	79%	very high
June Weather	15°C (60°F)	150 mm (5.9 inches)	73%	very high
July Weather	18°C (65°F)	137 mm (5.4 inches)	81%	very high
August Weather	17°C (63°F)	136 mm (5.3 inches)	81%	very high
September Weather	13°C (55°F)	127 mm (5.0 inches)	81%	high
October Weather	6°C (43°F)	152 mm (6.0 inches)	87%	moderate
November Weather	-2°C (28°F)	152 mm (6.0 inches)	89%	moderate
December Weather	-9°C (16°F)	126 mm (5.0 inches)	92%	low