May weather forecastRichmond Highlands, WA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Richmond Highlands, Washington, with an average temperature ranging between min 45.5°F (7.5°C) and max 62.8°F (17.1°C).Temperature
As May sets, the average high-temperature shows a slight increase, moving up from a cool 55.2°F (12.9°C) in April to a refreshing 62.8°F (17.1°C). Throughout May, Richmond Highlands records an average temperature of 45.5°F (7.5°C) at night.Humidity
The average relative humidity in May is 76%.Rainfall
In Richmond Highlands, Washington, during May, the rain falls for 13.3 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Richmond Highlands, during the entire year, the rain falls for 173 days and collects up to 25" (635mm) of precipitation.Snowfall
In Richmond Highlands, snow does not fall in May through October.Daylight
In Richmond Highlands, the average length of the day in May is 15h and 11min.On the first day of May in Richmond Highlands, sunrise is at 5:50 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:15 am and sunset at 8:59 pm PDT.
Sunshine
In May, the average sunshine in Richmond Highlands is 9.5h.UV index
In Richmond Highlands, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Richmond Highlands, WA
- Average high temperature in May: 62.8°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in May: 45.5°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.8°F).
Average pressure in May
Richmond Highlands, WA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in May
Richmond Highlands, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in May
Richmond Highlands, WA
- Average humidity in May: 76%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is July (72%).
Average rainfall in May
Richmond Highlands, WA
- Average rainfall in May: 1.57"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in May
Richmond Highlands, WA
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in May
Richmond Highlands, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Richmond Highlands, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (4.7 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
Richmond Highlands, WA
- Average daylight in May: 15h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 9h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Richmond Highlands, WA
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in May
Richmond Highlands, WA
- Average UV index in May: 4
The months with the highest UV index are June and 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
Richmond Highlands, WA
- Average cloud cover in May: 40
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Richmond Highlands, WA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
