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May Weather in Granby, Canada

Last updated: June 18, 2025

In May, the average temperature in Granby, Canada hovers around 13°C (56°F). However, temperatures can fluctuate dramatically, with minimums dipping to -3°C (27°F) and soaring up to 36°C (96°F). Expect some rain, as precipitation totals around 102 mm (4.0 in) over 13 days, contributing to an average humidity of 80%. Whether you're bracing for chilly days or warm spells, be prepared for a dynamic climate!

May Temperature in Granby

In May, in Granby, the average temperature is 13°C (56°F). Maximums can reach 36°C (96°F) and minimums can be as low as -3°C (27°F). This wide range of temperatures makes it essential for travelers to pack for both warm and chilly conditions.

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

The chart illustrates May temperature patterns in Granby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Granby, May typically has an average temperature of 13°C (56°F), with highs reaching up to 36°C (96°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec182028425665706860493424
Data source: Temperature data for Granby 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 Granby

In Granby in May, precipitation amounts to 102 mm (4.0 in) over the course of 13 days.

May Precipitation Trends in Granby

The chart displays monthly precipitation patterns in Granby, 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 Granby, May typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9184871171021171111156914112285
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Granby

In Granby in May humidity is 80%. With average temperature 13°C (56°F) this humidity feels like a damp chill that seeps into your bones, making outdoor exploration more challenging and necessitating layered clothing for comfort.

May Average Humidity in Granby

This chart illustrates the average monthly humidity levels in Granby, 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 Granby is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Granby

In Granby 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 Granby.

Maximum UV Index Levels in Granby for May

The chart shows the monthly maximum UV Index (UVI) for Granby 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 Granby typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899887532
Data source: Granby 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 Granby Compares to Other Months

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

This table compares monthly weather conditions in Granby, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)91 mm (3.6 inches)93%low
February Weather-7°C (20°F)84 mm (3.3 inches)92%moderate
March Weather-2°C (29°F)87 mm (3.4 inches)86%moderate
April Weather6°C (43°F)117 mm (4.6 inches)85%very high
May Weather13°C (56°F)102 mm (4.0 inches)80%very high
June Weather18°C (65°F)117 mm (4.6 inches)74%very high
July Weather21°C (70°F)111 mm (4.4 inches)76%very high
August Weather20°C (68°F)115 mm (4.5 inches)75%very high
September Weather16°C (60°F)69 mm (2.7 inches)78%high
October Weather10°C (49°F)141 mm (5.5 inches)86%moderate
November Weather1°C (34°F)122 mm (4.8 inches)88%moderate
December Weather-5°C (24°F)85 mm (3.3 inches)89%low

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