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May Weather in Sudbury, United States

Last updated: June 24, 2025

In May, the average temperature in Sudbury, United States hovers around 15°C (59°F). Expect temperatures to range from a brisk 2°C (35°F) at their lowest to a warm 34°C (94°F) at their peak. With 86 mm (3.4 in) of precipitation spread over 11 days, a bit of rain may accompany your stay, while the average humidity is a comfortable 72%.

May Temperature in Sudbury

In May in Sudbury, the average temperature is 15°C (59°F). Maximums can reach 34°C (94°F) and minimums can be as low as 2°C (35°F). This range makes it ideal for travelers who enjoy both warm days and cooler evenings.

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

The chart illustrates May temperature patterns in Sudbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sudbury, May typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (94°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec303237485969747366554233
Data source: Temperature data for Sudbury 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 Sudbury

In Sudbury in May, the precipitation amount is 86 mm (3.4 in), spread over 11 days.

May Precipitation Trends in Sudbury

The chart displays monthly precipitation patterns in Sudbury, 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 Sudbury, May typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec6985861248685133857913297118
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sudbury

In Sudbury in May humidity is 72%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket wrapping around you, creating a sultry atmosphere that can make traveling a bit uncomfortable. The stickiness in the air can leave you feeling sluggish, so it’s advisable to stay hydrated and take breaks often while exploring.

May Average Humidity in Sudbury

This chart illustrates the average monthly humidity levels in Sudbury, 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 Sudbury is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sudbury

In Sudbury 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 Sudbury.

Maximum UV Index Levels in Sudbury for May

The chart shows the monthly maximum UV Index (UVI) for Sudbury 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 Sudbury typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910997642
Data source: Sudbury 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 Sudbury Compares to Other Months

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

This table compares monthly weather conditions in Sudbury, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)69 mm (2.7 inches)86%moderate
February Weather0°C (32°F)85 mm (3.3 inches)84%moderate
March Weather3°C (38°F)86 mm (3.4 inches)82%high
April Weather9°C (48°F)124 mm (4.9 inches)80%very high
May Weather15°C (59°F)86 mm (3.4 inches)72%very high
June Weather20°C (69°F)85 mm (3.4 inches)72%very high
July Weather23°C (74°F)133 mm (5.3 inches)67%very high
August Weather23°C (73°F)85 mm (3.4 inches)66%very high
September Weather19°C (66°F)79 mm (3.1 inches)71%high
October Weather13°C (55°F)132 mm (5.2 inches)78%high
November Weather5°C (42°F)97 mm (3.8 inches)84%moderate
December Weather0°C (33°F)118 mm (4.6 inches)81%low

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