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May Weather in Saint-Hyacinthe, Canada

Last updated: June 18, 2025

In May, the average temperature in Saint-Hyacinthe, Canada is a mild 14°C (57°F), with a temperature range that can swing from a chilly -2°C (28°F) to a sizzling 36°C (97°F). Expect 98 mm (3.8 in) of precipitation spread over about 12 days, contributing to an average humidity of 80%. Be prepared for a mix of weather as you enjoy your time in this vibrant location!

May Temperature in Saint-Hyacinthe

In May in Saint-Hyacinthe, the average temperature is 14°C (57°F). The maximum can reach 36°C (97°F), and the minimum can be as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both lightweight and warm clothing for their visit.

May Weather in Saint-Hyacinthe: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Saint-Hyacinthe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Hyacinthe, May typically has an average temperature of 14°C (57°F), with highs reaching up to 36°C (97°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec161928425766716961493423
Data source: Temperature data for Saint-Hyacinthe 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 Saint-Hyacinthe

In Saint-Hyacinthe in May, the precipitation amount is 98 mm (3.8 in) spread over 12 days.

May Precipitation Trends in Saint-Hyacinthe

The chart displays monthly precipitation patterns in Saint-Hyacinthe, 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 Saint-Hyacinthe, May typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec86828511998107981136413411889
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Saint-Hyacinthe

In Saint-Hyacinthe in May, humidity is 80%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making travel uncomfortable and sticky, as sweat clings to your skin and the air feels heavy with moisture.

May Average Humidity in Saint-Hyacinthe

This chart illustrates the average monthly humidity levels in Saint-Hyacinthe, 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 Saint-Hyacinthe 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 Saint-Hyacinthe

In Saint-Hyacinthe 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 Saint-Hyacinthe.

Maximum UV Index Levels in Saint-Hyacinthe for May

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

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

This table compares monthly weather conditions in Saint-Hyacinthe, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)86 mm (3.4 inches)93%low
February Weather-7°C (19°F)82 mm (3.2 inches)92%moderate
March Weather-2°C (28°F)85 mm (3.3 inches)86%moderate
April Weather6°C (43°F)119 mm (4.7 inches)85%very high
May Weather14°C (57°F)98 mm (3.8 inches)80%very high
June Weather19°C (66°F)107 mm (4.2 inches)74%very high
July Weather22°C (71°F)98 mm (3.9 inches)76%very high
August Weather21°C (69°F)113 mm (4.5 inches)75%very high
September Weather16°C (61°F)64 mm (2.5 inches)78%high
October Weather10°C (49°F)133 mm (5.3 inches)86%moderate
November Weather1°C (34°F)118 mm (4.6 inches)88%moderate
December Weather-5°C (23°F)89 mm (3.5 inches)89%low

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