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May Weather in Falmouth, United States

Last updated: June 24, 2025

In Falmouth, United States, the average temperature in May hovers around a pleasant 20°C (68°F). Expect variations with a minimum of 3°C (38°F) and a maximum reaching up to 35°C (95°F). This month also sees an average precipitation of 109 mm (4.3 in) over 12 days, while the relative humidity remains high at 78%.

May Temperature in Falmouth

In May in Falmouth, the average temperature is 20°C (68°F). Maximums can reach up to 35°C (95°F), while minimums can drop as low as 3°C (38°F). Be sure to pack a variety of clothing to accommodate the temperature fluctuations during your travels.

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

The chart illustrates May temperature patterns in Falmouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Falmouth, May typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec394348586876817873634943
Data source: Temperature data for Falmouth 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 Falmouth

In Falmouth in May, the total precipitation amount is 109 mm (4.3 in) during a span of 12 days.

May Precipitation Trends in Falmouth

The chart displays monthly precipitation patterns in Falmouth, 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 Falmouth, May typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec62907610110910991148911097788
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Falmouth

In Falmouth in May humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

May Average Humidity in Falmouth

This chart illustrates the average monthly humidity levels in Falmouth, 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 Falmouth is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Falmouth

In Falmouth 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 Falmouth.

Maximum UV Index Levels in Falmouth for May

The chart shows the monthly maximum UV Index (UVI) for Falmouth 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 Falmouth typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Falmouth 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 Falmouth Compares to Other Months

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

This table compares monthly weather conditions in Falmouth, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)62 mm (2.4 inches)86%moderate
February Weather6°C (43°F)90 mm (3.6 inches)86%moderate
March Weather9°C (49°F)76 mm (3.0 inches)86%high
April Weather15°C (59°F)101 mm (4.0 inches)84%very high
May Weather20°C (68°F)109 mm (4.3 inches)78%very high
June Weather24°C (76°F)109 mm (4.3 inches)79%very high
July Weather27°C (81°F)91 mm (3.6 inches)70%very high
August Weather26°C (78°F)148 mm (5.8 inches)59%very high
September Weather23°C (73°F)91 mm (3.6 inches)68%very high
October Weather17°C (63°F)109 mm (4.3 inches)80%high
November Weather9°C (49°F)77 mm (3.0 inches)86%moderate
December Weather6°C (43°F)88 mm (3.5 inches)85%moderate

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