May Weather in Mississauga, Canada

Last updated: June 18, 2025

In Mississauga, Canada, the average temperature for May is a mild 12°C (54°F). However, you can expect temperatures to vary, with lows dipping to -1°C (30°F) and highs reaching up to 29°C (84°F). Precipitation is fairly frequent, with an average of 98 mm (3.9 in) falling over 12 days. Additionally, the average humidity hovers around 82%, contributing to a cozy, if sometimes damp, atmosphere.

May Temperature in Mississauga

In May in Mississauga, the average temperature is 12°C (54°F). Maximum temperatures can reach 29°C (84°F), while minimum temperatures can drop as low as -1°C (30°F). This variation makes it ideal for travelers to pack a range of clothing to accommodate both warm days and chilly nights.

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

The chart illustrates May temperature patterns in Mississauga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mississauga, May typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (84°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec262733425465727164533932
Data source: Temperature data for Mississauga 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 Mississauga

In Mississauga in May, the precipitation amount is 98 mm (3.9 in) over the course of 12 days.

May Precipitation Trends in Mississauga

The chart displays monthly precipitation patterns in Mississauga, 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 Mississauga, May typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec73806411098887577631087978
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mississauga

In Mississauga in May humidity is 82%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and sweat-inducing, which can be quite uncomfortable for traveling.

May Average Humidity in Mississauga

This chart illustrates the average monthly humidity levels in Mississauga, 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 Mississauga is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mississauga

In Mississauga 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 Mississauga.

Maximum UV Index Levels in Mississauga for May

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

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

This table compares monthly weather conditions in Mississauga, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)73 mm (2.9 inches)91%low
February Weather-3°C (27°F)80 mm (3.2 inches)91%moderate
March Weather1°C (34°F)64 mm (2.5 inches)88%moderate
April Weather6°C (43°F)110 mm (4.3 inches)88%very high
May Weather12°C (54°F)98 mm (3.9 inches)82%very high
June Weather18°C (65°F)88 mm (3.5 inches)79%very high
July Weather22°C (72°F)75 mm (2.9 inches)77%very high
August Weather22°C (71°F)77 mm (3.0 inches)72%very high
September Weather18°C (64°F)63 mm (2.5 inches)76%high
October Weather12°C (53°F)108 mm (4.3 inches)83%moderate
November Weather4°C (39°F)79 mm (3.1 inches)88%moderate
December Weather0°C (32°F)78 mm (3.1 inches)87%low

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