May Weather in Smiths Falls, Canada

Last updated: June 18, 2025

In May, the average temperature in Smiths Falls, Canada hovers around 13°C (55°F). Expect a range of -3°C (28°F) to 31°C (89°F), showcasing the area's diverse climate. With 103 mm (4.1 in) of precipitation over approximately 13 days, it's wise to prepare for some rain. The average humidity sits at a comfortable 75%, adding to the distinctiveness of the season.

May Temperature in Smiths Falls

In May in Smiths Falls, the average temperature is 13°C (55°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as -3°C (28°F). Therefore, travelers should be prepared for a wide range of weather conditions, packing both light clothing for warm days and warmer layers for cooler nights.

May Weather in Smiths Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Smiths Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smiths Falls, May typically has an average temperature of 13°C (55°F), with highs reaching up to 31°C (89°F) and lows dropping to around -3°C (28°F).

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

May Precipitation in Smiths Falls

In Smiths Falls in May, the precipitation amount is 103 mm (4.1 in) spread over a duration of 13 days.

May Precipitation Trends in Smiths Falls

The chart displays monthly precipitation patterns in Smiths Falls, 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 Smiths Falls, May typically receives around 103 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.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Smiths Falls

In Smiths Falls in May humidity is 75%. With average temperature 13°C (55°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions less enjoyable without layered clothing and frequent breaks to warm up indoors.

May Average Humidity in Smiths Falls

This chart illustrates the average monthly humidity levels in Smiths Falls, 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 Smiths Falls is approximately 75%, 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 Smiths Falls

In Smiths Falls 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 Smiths Falls.

Maximum UV Index Levels in Smiths Falls for May

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

Data source: Smiths Falls 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 Smiths Falls Compares to Other Months

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

This table compares monthly weather conditions in Smiths Falls, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	73 mm (2.9 inches)	93%	low
February Weather	-6°C (21°F)	74 mm (2.9 inches)	93%	moderate
March Weather	-2°C (29°F)	77 mm (3.0 inches)	86%	moderate
April Weather	6°C (43°F)	116 mm (4.6 inches)	82%	very high
May Weather	13°C (55°F)	103 mm (4.1 inches)	75%	very high
June Weather	18°C (64°F)	87 mm (3.4 inches)	68%	very high
July Weather	22°C (71°F)	113 mm (4.4 inches)	69%	very high
August Weather	20°C (69°F)	91 mm (3.6 inches)	67%	very high
September Weather	16°C (62°F)	57 mm (2.2 inches)	72%	high
October Weather	10°C (50°F)	130 mm (5.1 inches)	83%	moderate
November Weather	2°C (35°F)	91 mm (3.6 inches)	88%	moderate
December Weather	-4°C (25°F)	77 mm (3.0 inches)	89%	low