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May Weather in Waterville, United States

Last updated: June 24, 2025

In May, the average temperature in Waterville, United States hovers around 14°C (57°F), offering a mild climate with a range that can swing from a chilly -3°C (28°F) to a balmy 32°C (90°F). Expect about 135 mm (5.3 in) of precipitation spread over 17 days, contributing to an average humidity level of 82%. Pack accordingly to enjoy this varied weather!

May Temperature in Waterville

In May in Waterville, the average temperature is 14°C (57°F). Maximums can reach 32°C (90°F) and minimums can be as low as -3°C (28°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.

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

The chart illustrates May temperature patterns in Waterville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterville, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455766716962523729
Data source: Temperature data for Waterville 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 Waterville

In Waterville in May, the precipitation amount is 135 mm (5.3 in) spread over 17 days.

May Precipitation Trends in Waterville

The chart displays monthly precipitation patterns in Waterville, 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 Waterville, May typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec971069912513512217513694175117110
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Waterville

In Waterville in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

May Average Humidity in Waterville

This chart illustrates the average monthly humidity levels in Waterville, 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 Waterville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Waterville

In Waterville 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 Waterville.

Maximum UV Index Levels in Waterville for May

The chart shows the monthly maximum UV Index (UVI) for Waterville 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 Waterville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Waterville 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 Waterville Compares to Other Months

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

This table compares monthly weather conditions in Waterville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)97 mm (3.8 inches)90%moderate
February Weather-3°C (27°F)106 mm (4.2 inches)90%moderate
March Weather1°C (33°F)99 mm (3.9 inches)87%high
April Weather7°C (45°F)125 mm (4.9 inches)88%very high
May Weather14°C (57°F)135 mm (5.3 inches)82%very high
June Weather19°C (66°F)122 mm (4.8 inches)79%very high
July Weather22°C (71°F)175 mm (6.9 inches)78%very high
August Weather20°C (69°F)136 mm (5.4 inches)76%very high
September Weather17°C (63°F)94 mm (3.7 inches)78%very high
October Weather11°C (52°F)175 mm (6.9 inches)84%high
November Weather3°C (38°F)117 mm (4.6 inches)89%moderate
December Weather-1°C (30°F)110 mm (4.3 inches)86%low

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