May weather forecast
Coupeville, WA

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Weather in May

May, the last month of the spring in Coupeville, is a refreshing month, with an average temperature fluctuating between 48°F (8.9°C) and 59°F (15°C).

Temperature

May's onset brings a minor rise in the average high-temperature, moving from a fresh 52.3°F (11.3°C) in April to a moderate 59°F (15°C). During the nights in May, Coupeville experiences a consistent average temperature of 48°F (8.9°C).

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Coupeville, in May, during 13.6 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Coupeville, during the entire year, the rain falls for 183.8 days and collects up to 24.45" (621mm) of precipitation.

Snowfall

In Coupeville, Washington, snow does not fall in May through October.

Ocean temperature

In Coupeville, in May, the average water temperature is 46.4°F (8°C).
Note: In 46.4°F (8°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health.

Daylight

In Coupeville, Washington, the average length of the day in May is 15h and 14min.
On the first day of May, sunrise is at 5:50 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 9:02 pm PDT.

Sunshine

The average sunshine in May is 9.8h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 4 during May translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What is the usual temperature for Coupeville in May?

The average high-temperature and low-temperature in Coupeville during May are 59°F (15°C) and 48°F (8.9°C) respectively.

What is the average humidity in May in Coupeville?

The average relative humidity in May in Coupeville is 78%.

How many days does it rain in May in Coupeville?

In May, in Coupeville, Washington, the rain falls for 13.6 days. Throughout May, 1.69" (43mm) of precipitation is accumulated.

When it does not snow in Coupeville?

May through October are months without snowfall.

Does it snow in Coupeville in May?

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

What is the ocean temperature in May in Coupeville?

In Coupeville, Washington, the average seawater temperature in May is 46.4°F (8°C). Swimming in 46.4°F (8°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 Coupeville have in May?

In Coupeville, the average day length in May is 15h and 14min.

When are sunrise and sunset in May in Coupeville?

In May, on the first day of the month, sunrise is at 5:50 am and sunset at 8:25 pm. On the last day of the month, in Coupeville, sunrise is at 5:14 am and sunset at 9:02 pm PDT.

How many hours of sunshine does Coupeville have in May?

The average sunshine duration in May is 9.8h.

What is the UV index reading in May in Coupeville?

In Coupeville, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health risk 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
Coupeville, WA

Average temperature in May - Coupeville, WA
  • Average high temperature in May: 59°F

The warmest month (with the highest average high temperature) is July (66.2°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in May: 48°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is February (37.9°F).

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Average pressure in May
Coupeville, WA

Average pressure in May - Coupeville, WA
  • Average pressure in May: 30.03"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed in May
Coupeville, WA

Average wind speed in May - Coupeville, WA
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is November (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in May
Coupeville, WA

Average humidity in May - Coupeville, WA
  • Average humidity in May: 78%

The months with the highest relative humidity are January, February and March (81%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in May
Coupeville, WA

Average rainfall in May - Coupeville, WA
  • Average rainfall in May: 1.69"

The wettest month (with the highest rainfall) is November (3.46").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days in May
Coupeville, WA

Average rainfall days in May - Coupeville, WA
  • Average rainfall days in May: 13.6 days

The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is August (7.5 days).

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Average snowfall in May
Coupeville, WA

Average snowfall in May - Coupeville, WA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Coupeville, WA

Average snowfall days in May - Coupeville, WA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (3.3 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
Coupeville, WA

Average sea temperature in May - Coupeville, WA
  • Average sea temperature in May: 46.3°F

The best month for swimming (with the highest average sea temperature) is August (53°F).
The coldest month (with the lowest average sea temperature) is February (45°F).

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Average daylight in May /
Average sunshine in May
Coupeville, WA

Average daylight in May / Average sunshine in May - Coupeville, WA
  • Average daylight in May: 15h and 1min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in May: 9h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days in May
Coupeville, WA

Average sunshine days in May - Coupeville, WA
  • Average sunshine days in May: 15.6 days

The month with the most sunshine days is August (21.7 days).
The month with the least sunshine days is March (7.5 days).

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Average UV index in May
Coupeville, WA

Average UV index in May - Coupeville, WA
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Coupeville, WA

Average cloud cover in May - Coupeville, WA
  • Average cloud cover in May: 37

The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in May
Coupeville, WA

Average visibility in May - Coupeville, WA
  • 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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Coupeville, Washington, USA

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