May weather forecastFriday Harbor, WA
May
Weather in May
May, the last month of the spring in Friday Harbor, is a refreshing month, with an average temperature fluctuating between 50.9°F (10.5°C) and 57.7°F (14.3°C).Temperature
Friday Harbor's weather in May presents a minor rise in the average high-temperature, moving from a fresh 52.2°F (11.2°C) in April to a refreshing 57.7°F (14.3°C). Friday Harbor's nocturnal average in May closely mirrors its daytime temperatures, settling at a fresh 50.9°F (10.5°C).Humidity
In Friday Harbor, the average relative humidity in May is 77%.Rainfall
In Friday Harbor, in May, it is raining for 12.3 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, there are 167.7 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
In Friday Harbor, snow does not fall in April through October.Ocean temperature
In Friday Harbor, in May, the average water temperature is 46.2°F (7.9°C).Note: While a brief time in 46.2°F (7.9°C) at 55.4°F (13°C) is already bracing, plunging below 50°F (10°C) can severely affect breathing and introduce a cold shock, relying on your physical state.
Daylight
In Friday Harbor, the average length of the day in May is 15h and 16min.On the first day of May, sunrise is at 5:50 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 9:05 pm PDT.
Sunshine
In Friday Harbor, the average sunshine in May is 9.6h.UV index
In Friday Harbor, 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 average person.Note: The daily high UV index of 4 during May translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Friday Harbor, WA
- Average high temperature in May: 57.7°F
The warmest month (with the highest average high temperature) is July (64.9°F).
The months with the lowest average high temperature are January, February and December (45.3°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is August (57.7°F).
The coldest month (with the lowest average low temperature) is February (40.5°F).
Average pressure in May
Friday Harbor, WA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in May
Friday Harbor, WA
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
Friday Harbor, WA
- Average humidity in May: 77%
The months with the highest relative humidity are January, August and September (79%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Friday Harbor, WA
- Average rainfall in May: 1.34"
The wettest month (with the highest rainfall) is November (3.43").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in May
Friday Harbor, WA
- Average rainfall days in May: 12.3 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (5.3 days).
Average snowfall in May
Friday Harbor, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Friday Harbor, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
Friday Harbor, WA
- Average sea temperature in May: 46.2°F
The best months for swimming (with the highest average sea temperature) are August and September (52.3°F).
The coldest month (with the lowest average sea temperature) is February (44.9°F).
Average daylight in May /
Average sunshine in May
Friday Harbor, WA
- Average daylight in May: 15h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 9h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in May
Friday Harbor, WA
- Average sunshine days in May: 17.1 days
The month with the most sunshine days is August (24.7 days).
The month with the least sunshine days is November (8.7 days).
Average UV index in May
Friday Harbor, 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).
Average cloud cover in May
Friday Harbor, WA
- Average cloud cover in May: 37
The months with the most cloud cover are February and December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility in May
Friday Harbor, 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).
