May weather forecast and climate
Stonington, ME

Weather in May

The last month of the spring, May, is a cool month in Stonington, Maine, with average temperature varying between 45.5°F (7.5°C) and 55°F (12.8°C).

Temperature

In Stonington, the average high-temperature increases, from a frosty 46°F (7.8°C) in April, to a fresh 55°F (12.8°C). In May, in Stonington, the average low-temperature is 45.5°F (7.5°C).

Humidity

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

Rainfall

In Stonington, Maine,, during 12 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, there are 115.5 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

Snowfall

In Stonington snow does not fall through September.

Ocean temperature

In Stonington, Maine,, the average water temperature is 44.4°F (6.9°C).
Note: Swimming in 44.4°F (6.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in May is 14.8h.

Sunshine

The average sunshine in Stonington is 8.1h.

UV index

In May, the average daily maximum UV index in Stonington, Maine, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in May in Stonington?

In May, the average relative humidity in Stonington, Maine, is 82%.

How much does it rain in Stonington in May?

In Stonington, during May, the rain falls for 12 days and regularly aggregates up to 1.34" (34mm) of precipitation.

When it does not snow in Stonington?

In Stonington, Maine, snow does not fall in May through September.

Does it snow in Stonington in May?

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

What is the ocean temperature in May in Stonington?

In May, the average ocean temperature in Stonington is 44.4°F (6.9°C). Swimming in 44.4°F (6.9°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 Stonington have in May?

In Stonington, the average length of the day in May is 14.8h.

How many hours of sunshine does Stonington have in May?

The average sunshine in May in Stonington, Maine, is 8.1h.

How high is the UV index in May in Stonington?

In May, the average daily maximum UV index in Stonington, Maine, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in May
Stonington, ME

Average temperature in May - Stonington, ME
  • Average high temperature in May: 55°F

The warmest month (with the highest average high temperature) is August (68.9°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in May: 45.5°F

The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in May
Stonington, ME

Average pressure in May - Stonington, ME
  • Average pressure in May: 29.99"

The month with the highest atmospheric pressure is September (30.04").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in May
Stonington, ME

Average wind speed in May - Stonington, ME
  • Average wind speed in May: 9.6mph

The windiest month (with the highest average wind speed) is January (14.4mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in May
Stonington, ME

Average humidity in May - Stonington, ME
  • Average humidity in May: 82%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (76%).

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Average rainfall in May
Stonington, ME

Average rainfall in May - Stonington, ME
  • Average rainfall in May: 1.34"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is September (0.91").

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Average rainfall days in May
Stonington, ME

Average rainfall days in May - Stonington, ME
  • Average rainfall days in May: 12 days

The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (5.3 days).

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Average snowfall in May
Stonington, ME

Average snowfall in May - Stonington, ME
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.32").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Stonington, ME

Average snowfall days in May - Stonington, ME
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (7.7 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in May
Stonington, ME

Average sea temperature in May - Stonington, ME
  • Average sea temperature in May: 44.5°F

The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).

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Average daylight in May /
Average sunshine in May
Stonington, ME

Average daylight in May / Average sunshine in May - Stonington, ME
  • Average daylight in May: 14.8h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in May: 8.1h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is December (Average sunshine: 4.5h).

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Average sunshine days in May
Stonington, ME

Average sunshine days in May - Stonington, ME
  • Average sunshine days in May: 16.3 days

The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is July (15.4 days).

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Average UV index in May
Stonington, ME

Average UV index in May - Stonington, ME
  • Average UV index in May: 4

Months with the highest UV index are June, July and August (UV index 5).
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
Stonington, ME

Average cloud cover in May - Stonington, ME
  • Average cloud cover in May: 47

Months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in May
Stonington, ME

Average visibility in May - Stonington, ME
  • Average visibility in May: 6mi

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

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