May weather forecastRoche Harbor, WA
May
Weather in May
May, the last month of the spring in Roche Harbor, is a moderate month, with an average temperature fluctuating between 50.9°F (10.5°C) and 57.7°F (14.3°C).Temperature
Roche Harbor's weather in May presents a minor rise in the average high-temperature, moving from a cool 52.2°F (11.2°C) in April to a moderate 57.7°F (14.3°C). During the nights of May, Roche Harbor records an average temperature of 50.9°F (10.5°C), a minor drop from daytime peaks.Humidity
The average relative humidity in May is 77%.Rainfall
In Roche Harbor, Washington, in May, during 12.3 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, there are 167.7 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
In Roche Harbor, snow does not fall in April through October.Daylight
In Roche Harbor, the average length of the day in May is 15h and 17min.On the first day of May, sunrise is at 5:51 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 9:06 pm PDT.
Sunshine
The average sunshine in May is 9.6h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during May translates into the following guidance:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Roche 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
Roche 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
Roche 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
Roche 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
Roche 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
Roche 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
Roche 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
Roche 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 daylight in May /
Average sunshine in May
Roche 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
Roche 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
Roche 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
Roche 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
Roche 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).
