May weather forecast
West Falmouth, MA

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Weather in May

The last month of the spring, May, is a mild month in West Falmouth, Massachusetts, with an average temperature fluctuating between 57.7°F (14.3°C) and 51.4°F (10.8°C).

Temperature

May signifies a subtle uplift in the average high-temperature, adjusting from a chilly 49.1°F (9.5°C) in April to a mild 57.7°F (14.3°C). West Falmouth, during the May nights, maintains an average temperature of 51.4°F (10.8°C), closely aligned with its daytime readings.

Humidity

In May, the average relative humidity is 81%.

Rainfall

In May, the rain falls for 15.7 days. Throughout May, 2.4" (61mm) of precipitation is accumulated. In West Falmouth, during the entire year, the rain falls for 155.1 days and collects up to 32.48" (825mm) of precipitation.

Snowfall

In West Falmouth, snow does not fall in May through September.

Ocean temperature

In West Falmouth, the average seawater temperature in May is 50.4°F (10.2°C).
Note: Swimming in 50.4°F (10.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In West Falmouth, the average length of the day in May is 14h and 33min.
On the first day of May, sunrise is at 5:38 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:09 pm EDT.

Sunshine

The average sunshine in May is 8.6h.

UV index

In May, the average daily maximum UV index in West Falmouth is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 5 during May translates into the following guidance:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.

Frequently asked questions

What is the average May temperature?

During May, West Falmouth experiences an average high-temperature of 57.7°F (14.3°C) and a low-temperature of 51.4°F (10.8°C).

What is the average humidity in May?

The average relative humidity in May is 81%.

How much does it rain in May?

In West Falmouth, in May, during 15.7 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in West Falmouth in May?

In May, in West Falmouth, it doesn't snow. April is the latest month when it typically snows.

What is the ocean temperature in May in West Falmouth?

In West Falmouth, the average seawater temperature in May is 50.4°F (10.2°C). Swimming in 50.4°F (10.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does West Falmouth have in May?

In West Falmouth, the average day length in May is 14h and 33min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 5:38 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:09 pm EDT.

How many hours of sunshine does West Falmouth have in May?

In West Falmouth, the average sunshine duration in May is 8.6h.

What is the UV index reading in May?

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
West Falmouth, MA

Average temperature in May - West Falmouth, MA
  • Average high temperature in May: 57.7°F

The warmest month (with the highest average high temperature) is August (74.5°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in May: 51.4°F

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

Average pressure in May
West Falmouth, MA

Average pressure in May - West Falmouth, MA
  • Average pressure in May: 30.02"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
West Falmouth, MA

Average wind speed in May - West Falmouth, MA
  • Average wind speed in May: 11.2mph

The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (9.9mph).

Average humidity in May
West Falmouth, MA

Average humidity in May - West Falmouth, MA
  • Average humidity in May: 81%

The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).

Average rainfall in May
West Falmouth, MA

Average rainfall in May - West Falmouth, MA
  • Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is December (3.7").
The driest months (with the least rainfall) are August and September (1.85").

Average rainfall days in May
West Falmouth, MA

Average rainfall days in May - West Falmouth, MA
  • Average rainfall days in May: 15.7 days

The month with the highest number of rainy days is April (16.2 days).
The month with the least rainy days is January (9.3 days).

Average snowfall in May
West Falmouth, MA

Average snowfall in May - West Falmouth, MA
  • Average snowfall in May: 0"

The month with the highest snowfall is March (2.24").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
West Falmouth, MA

Average snowfall days in May - West Falmouth, MA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in May
West Falmouth, MA

Average sea temperature in May - West Falmouth, MA
  • Average sea temperature in May: 50.4°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

Average daylight in May /
Average sunshine in May
West Falmouth, MA

Average daylight in May / Average sunshine in May - West Falmouth, MA
  • Average daylight in May: 14h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in May
West Falmouth, MA

Average sunshine days in May - West Falmouth, MA
  • Average sunshine days in May: 13.3 days

The month with the most sunshine days is August (16.4 days).
The month with the least sunshine days is April (12.3 days).

Average UV index in May
West Falmouth, MA

Average UV index in May - West Falmouth, MA
  • Average UV index in May: 5

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in May
West Falmouth, MA

Average cloud cover in May - West Falmouth, MA
  • Average cloud cover in May: 44

The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in May
West Falmouth, MA

Average visibility in May - West Falmouth, MA
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

West Falmouth, Massachusetts, USA

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