May weather forecast
Provincetown, MA

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Residential homes along the scenic shores of Provincetown in Cape Cod, Massachusetts
Residential homes along the scenic shores of Provincetown in Cape Cod, Massachusetts

Weather in May

May provides a welcome relief from the cold months, with temperatures soaring to 55°F (12.8°C), making it much warmer than April. Provincetown, Massachusetts enjoys long, sunny days as spring is in full bloom. Rainfall reduces from April's high, balancing between sun and rain to keep the city green and blooming. Warmer and longer days combined with decreased rainfall make May ideal for outdoor activities. The wind conditions stabilize, and the sea gets relatively warmer, allowing some room for water activities.

Temperature

The onset of May marks a slight increase in the average high-temperature, moving from a frosty 46.9°F (8.3°C) in April to a fresh 55°F (12.8°C). Provincetown's evenings during May maintain an average temperature of 49.6°F (9.8°C), aligning closely with the daytime temperatures.

Humidity

In Provincetown, the average relative humidity in May is 83%.

Rainfall

In May, in Provincetown, the rain falls for 16.2 days. Throughout May, 2.36" (60mm) of precipitation is accumulated. In Provincetown, Massachusetts, during the entire year, the rain falls for 157.1 days and collects up to 32.17" (817mm) of precipitation.

Snowfall

May through October are months without snowfall in Provincetown, Massachusetts.

Ocean temperature

In May, the average ocean temperature in Provincetown, Massachusetts, is 48.9°F (9.4°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Provincetown, the average length of the day in May is 14h and 35min.
On the first day of May in Provincetown, sunrise is at 5:35 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:07 am and sunset at 8:09 pm EDT.

Sunshine

In Provincetown, the average sunshine in May is 8.7h.

UV index

In Provincetown, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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Frequently asked questions

What are the temperatures in Provincetown in May?

During May, Provincetown experiences an average high-temperature of 55°F (12.8°C) and a low-temperature of 49.6°F (9.8°C).

What is the average humidity in May in Provincetown?

In May, the average relative humidity in Provincetown is 83%.

How many days does it rain in May in Provincetown?

In Provincetown, in May, it is raining for 16.2 days, with typically 2.36" (60mm) of accumulated precipitation.

When it does not snow in Provincetown?

May through October are months without snowfall in Provincetown.

Does it snow in Provincetown in May?

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

What is the water temperature in May in Provincetown?

In May, the average ocean temperature is 48.9°F (9.4°C). Swimming in 48.9°F (9.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in May in Provincetown?

In Provincetown, the average day length in May is 14h and 35min.

What time are sunrise and sunset in May in Provincetown?

In May, on the first day of the month, sunrise is at 5:35 am and sunset at 7:40 pm. On the last day of the month, in Provincetown, sunrise is at 5:07 am and sunset at 8:09 pm EDT.

How many hours of sunshine does Provincetown have in May?

In May, the average sunshine duration in Provincetown, Massachusetts, is 8.7h.

What is the UV index reading in May in Provincetown?

The average daily maximum UV index in May in Provincetown, Massachusetts, is 4. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Provincetown, MA

Average temperature in May - Provincetown, MA
  • Average high temperature in May: 55°F

The warmest month (with the highest average high temperature) is August (71.8°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in May: 49.6°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

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Average pressure in May
Provincetown, MA

Average pressure in May - Provincetown, MA
  • Average pressure in May: 30.01"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
Provincetown, MA

Average wind speed in May - Provincetown, MA
  • Average wind speed in May: 12.5mph

The windiest month (with the highest average wind speed) is January (17.8mph).
The calmest month (with the lowest average wind speed) is August (10.9mph).

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Average humidity in May
Provincetown, MA

Average humidity in May - Provincetown, MA
  • Average humidity in May: 83%

The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in May
Provincetown, MA

Average rainfall in May - Provincetown, MA
  • Average rainfall in May: 2.36"

The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (2.17").

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Average rainfall days in May
Provincetown, MA

Average rainfall days in May - Provincetown, MA
  • Average rainfall days in May: 16.2 days

The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (8.6 days).

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Average snowfall in May
Provincetown, MA

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

The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Provincetown, MA

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

The month with the highest number of snowfall days is January (6.3 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
Provincetown, MA

Average sea temperature in May - Provincetown, MA
  • Average sea temperature in May: 49°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

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

Average daylight in May / Average sunshine in May - Provincetown, MA
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
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 month with the least sunshine is December (Average sunshine: 4h and 24min).

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Average sunshine days in May
Provincetown, MA

Average sunshine days in May - Provincetown, MA
  • Average sunshine days in May: 14 days

The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is July (12.6 days).

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Average UV index in May
Provincetown, MA

Average UV index in May - Provincetown, MA
  • Average UV index in May: 4

The month with the highest UV index is July (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
Provincetown, MA

Average cloud cover in May - Provincetown, MA
  • Average cloud cover in May: 44

The month with the most cloud cover is December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in May
Provincetown, MA

Average visibility in May - Provincetown, 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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Provincetown, Massachusetts, USA

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