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May Weather in Grimsby, Canada

Last updated: June 18, 2025

In Grimsby, Canada, the average temperature in May hovers around 12°C (53°F), with a minimum of 0°C (33°F) and a maximum of 25°C (77°F). Expect around 98 mm (3.9 in) of precipitation spread over 12 days, contributing to an average humidity of 82%.

May Temperature in Grimsby

In May in Grimsby, the average temperature is 12°C (53°F). Maximum temperatures can reach up to 25°C (77°F), while minimum temperatures can drop as low as 0°C (33°F). This makes it a perfect time to explore the outdoors, offering a pleasant climate for various activities.

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

The chart illustrates May temperature patterns in Grimsby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grimsby, May typically has an average temperature of 12°C (53°F), with highs reaching up to 25°C (77°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec282934435365737266554234
Data source: Temperature data for Grimsby 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 Grimsby

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

May Precipitation Trends in Grimsby

The chart displays monthly precipitation patterns in Grimsby, 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 Grimsby, May typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec75836911598788876651158384
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Grimsby

In Grimsby in May, humidity is 82%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky, as you navigate through the thick air that weighs heavily on your skin.

May Average Humidity in Grimsby

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

In Grimsby 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 Grimsby.

Maximum UV Index Levels in Grimsby for May

The chart shows the monthly maximum UV Index (UVI) for Grimsby 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 Grimsby typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Grimsby 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 Grimsby Compares to Other Months

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

This table compares monthly weather conditions in Grimsby, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)75 mm (3.0 inches)91%low
February Weather-2°C (29°F)83 mm (3.3 inches)91%moderate
March Weather1°C (35°F)69 mm (2.7 inches)88%moderate
April Weather6°C (43°F)115 mm (4.5 inches)88%very high
May Weather12°C (53°F)98 mm (3.9 inches)82%very high
June Weather18°C (65°F)78 mm (3.1 inches)79%very high
July Weather23°C (73°F)88 mm (3.5 inches)77%very high
August Weather22°C (72°F)76 mm (3.0 inches)72%very high
September Weather19°C (66°F)65 mm (2.6 inches)76%high
October Weather13°C (56°F)115 mm (4.5 inches)83%moderate
November Weather5°C (42°F)83 mm (3.3 inches)88%moderate
December Weather1°C (35°F)84 mm (3.3 inches)87%low

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