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May Weather in Brockville, Canada

Last updated: June 18, 2025

In May, the average temperature in Brockville, Canada hovers around 13°C (56°F). However, be prepared for a range of conditions, as the minimum can dip to -1°C (30°F), while the maximum can soar to 33°C (91°F). During this month, expect approximately 103 mm (4.1 in) of precipitation, typically spread over 13 days, with an average humidity of 75%.

May Temperature in Brockville

In May in Brockville, the average temperature is 13°C (56°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -1°C (30°F). Be prepared for a wide range of temperatures and pack accordingly for your journey!

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

The chart illustrates May temperature patterns in Brockville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brockville, May typically has an average temperature of 13°C (56°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec212331435565727063523828
Data source: Temperature data for Brockville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Brockville

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

May Precipitation Trends in Brockville

The chart displays monthly precipitation patterns in Brockville, 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 Brockville, May typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec828284125103941271067315111393
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Brockville

In Brockville in May humidity is 75%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill enveloping you, making travel a bit uncomfortable, as the moisture in the air clings to your skin and can dampen your spirits as well as your clothes.

May Average Humidity in Brockville

This chart illustrates the average monthly humidity levels in Brockville, 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 Brockville is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Brockville

In Brockville 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 Brockville.

Maximum UV Index Levels in Brockville for May

The chart shows the monthly maximum UV Index (UVI) for Brockville 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 Brockville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899997532
Data source: Brockville 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 Brockville Compares to Other Months

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

This table compares monthly weather conditions in Brockville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)82 mm (3.2 inches)93%low
February Weather-5°C (23°F)82 mm (3.2 inches)93%moderate
March Weather0°C (31°F)84 mm (3.3 inches)86%moderate
April Weather6°C (44°F)125 mm (4.9 inches)82%very high
May Weather13°C (56°F)103 mm (4.1 inches)75%very high
June Weather18°C (65°F)94 mm (3.7 inches)68%very high
July Weather22°C (72°F)127 mm (5.0 inches)69%very high
August Weather21°C (70°F)105 mm (4.2 inches)67%very high
September Weather17°C (63°F)73 mm (2.9 inches)72%high
October Weather11°C (52°F)151 mm (5.9 inches)83%moderate
November Weather3°C (38°F)113 mm (4.5 inches)88%moderate
December Weather-2°C (29°F)93 mm (3.7 inches)89%low

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