May weather forecast
Falmouth, MA

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Weather in May

The embrace of spring in May brings about warm and refreshing temperatures in Falmouth, Massachusetts. The rise in temperature continues, soaring to 51.3°F (10.7°C) at the coldest, indicating a significant leap from the toddler months of the year. Residents are treated to prolonged daylight and sunshine as the month progresses, contributing towards perfect outdoor conditions. It’s the optimal time for appreciating the full spring blossoms and scenic views around the town. Looking ahead, the last vestiges of temperate springtime weather give way to the initial touch of oncoming summer.

Temperature

The coming of May brings a minor shift in Falmouth's weather, with average high-temperatures adjusting from April's frosty 48.7°F (9.3°C) to a refreshing 57°F (13.9°C). Falmouth observes a consistent average low-temperature of 51.3°F (10.7°C) throughout May nights.

Humidity

The average relative humidity in May is 82%.

Rainfall

In May, the rain falls for 6.3 days. Throughout May, 0.39" (10mm) of precipitation is accumulated. Throughout the year, in Falmouth, there are 69.4 rainfall days, and 5.31" (135mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Falmouth, Massachusetts.

Ocean temperature

In Falmouth, the average seawater temperature in May is 50.4°F (10.2°C).
Note: Swimming at temperatures less than 50°F (10°C) in 50.4°F (10.2°C) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 55.4°F (13°C) without adequate warmth can be discomforting.

Daylight

In May, the average length of the day is 14h and 32min.
On the first day of the month, sunrise is at 5:38 am and sunset at 7:40 pm. On the last day of May, in Falmouth, Massachusetts, sunrise is at 5:10 am and sunset at 8:09 pm EDT.

Sunshine

In May, the average sunshine is 8.6h.

UV index

In May, the average daily maximum UV index 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: An average UV index of 5 in May transforms into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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Frequently asked questions

What are the temperatures in Falmouth in May?

An average high-temperature, in May, in Falmouth, is 57°F (13.9°C) and the average low-temperature is 51.3°F (10.7°C).

What is the average humidity in May in Falmouth?

In Falmouth, Massachusetts, the average relative humidity in May is 82%.

How many days does it rain in May in Falmouth?

In Falmouth, in May, during 6.3 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

When it does not snow in Falmouth?

April through November are months without snowfall.

How cold is the water in May in Falmouth?

In Falmouth, in May, the average water temperature is 50.4°F (10.2°C). 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.

How many hours of daylight does Falmouth have in May?

In May, the average day length is 14h and 32min.

What time are sunrise and sunset in May in Falmouth?

On the first day of May in Falmouth, Massachusetts, 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 Falmouth have in May?

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

What is the UV index intensity in May in Falmouth?

In Falmouth, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
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
Falmouth, MA

Average temperature in May - Falmouth, MA
  • Average high temperature in May: 57°F

The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in May: 51.3°F

The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

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Average pressure in May
Falmouth, MA

Average pressure in May - 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).

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Average wind speed in May
Falmouth, MA

Average wind speed in May - Falmouth, MA
  • Average wind speed in May: 11.6mph

The windiest month (with the highest average wind speed) is January (15.3mph).
The calmest months (with the lowest average wind speed) are July and August (10.2mph).

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Average humidity in May
Falmouth, MA

Average humidity in May - Falmouth, MA
  • Average humidity in May: 82%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in May
Falmouth, MA

Average rainfall in May - Falmouth, MA
  • Average rainfall in May: 0.39"

The wettest month (with the highest rainfall) is October (0.71").
The driest months (with the least rainfall) are July, August and September (0.31").

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Average rainfall days in May
Falmouth, MA

Average rainfall days in May - Falmouth, MA
  • Average rainfall days in May: 6.3 days

The month with the highest number of rainy days is July (7.7 days).
The month with the least rainy days is September (4.6 days).

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Average snowfall in May
Falmouth, MA

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

The month with the highest snowfall is December (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Falmouth, MA

Average snowfall days in May - Falmouth, MA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in May
Falmouth, MA

Average sea temperature in May - 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).

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

Average daylight in May / Average sunshine in May - 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 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).

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Average sunshine days in May
Falmouth, MA

Average sunshine days in May - Falmouth, MA
  • Average sunshine days in May: 22 days

The month with the most sunshine days is September (23.9 days).
The month with the least sunshine days is February (20.8 days).

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Average UV index in May
Falmouth, MA

Average UV index in May - 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).

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Average cloud cover in May
Falmouth, MA

Average cloud cover in May - 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).

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Average visibility in May
Falmouth, MA

Average visibility in May - 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).

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Falmouth, Massachusetts, USA

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