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May Weather in Waterville, United States

Last updated: June 24, 2025

In Waterville, United States, the average temperature in May hovers around 18°C (65°F), with a minimum dipping to 2°C (37°F) and soaring up to a maximum of 37°C (99°F). Expect an average precipitation of 201 mm (7.9 in) spread over 13 days, contributing to a notably high average humidity of 82%.

May Temperature in Waterville

In May in Waterville, the average temperature is 18°C (65°F). Maximum temperatures can reach up to 37°C (99°F), while minimum temperatures can dip as low as 2°C (37°F). Be prepared for a range of temperatures for comfortable travel experience!

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 18°C (65°F), with highs reaching up to 37°C (99°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec303045536577807672554335
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 201 mm (7.9 in) over a period of 13 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 201 mm (7.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec282887692011029198631233326
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 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

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.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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-1°C (30°F)28 mm (1.1 inches)76%moderate
February Weather-1°C (30°F)28 mm (1.1 inches)77%moderate
March Weather7°C (45°F)87 mm (3.4 inches)70%high
April Weather12°C (53°F)69 mm (2.7 inches)73%very high
May Weather18°C (65°F)201 mm (7.9 inches)82%very high
June Weather25°C (78°F)102 mm (4.0 inches)82%extreme
July Weather27°C (81°F)91 mm (3.6 inches)81%extreme
August Weather25°C (77°F)98 mm (3.9 inches)78%very high
September Weather22°C (72°F)63 mm (2.5 inches)71%very high
October Weather13°C (55°F)123 mm (4.9 inches)71%high
November Weather6°C (43°F)33 mm (1.3 inches)81%moderate
December Weather2°C (36°F)26 mm (1.0 inches)84%moderate

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