Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
Washington's May weather indicates a minor increase in high-temperatures, edging from April's cool 55.2°F (12.9°C) to a comfortable 63.1°F (17.3°C). In Washington, the nighttime temperature registers a significant drop from daytime peaks to an average of 40.6°F (4.8°C) in May.Humidity
In Washington, the average relative humidity in May is 64%.Rainfall
In Washington, in May, during 10.1 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 72.9 rainfall days, and 36.06" (916mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Washington, in May, during 2.2 snowfall days, 6.65" (169mm) of snow is typically accumulated. Throughout the year, in Washington, there are 53.3 snowfall days, and 151.57" (3850mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 22min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:57 pm. On the last day of May, in Washington, sunrise is at 5:38 am and sunset at 8:23 pm PDT.
Sunshine
In May, the average sunshine in Washington is 10.6h.UV index
In Washington, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during May translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Minimize direct exposure to the Sun during midday when its radiation is at its peak. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Washington?
What is the average humidity in May in Washington?
How many days does it rain in May in Washington?
How much does it snow in Washington in May?
What is the average length of the day in May in Washington?
When are sunrise and sunset in May in Washington?
How many hours of sunshine does Washington have in May?
How high is the UV index in May in Washington?
Average temperature in May
Washington, CA
- Average high temperature in May: 63.1°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in May: 40.6°F
The month with the highest average low temperature is July (52.9°F).
The coldest month (with the lowest average low temperature) is December (29.1°F).
Average pressure in May
Washington, CA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Washington, CA
- Average wind speed in May: 5.5mph
The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Washington, CA
- Average humidity in May: 64%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is July (39%).
Average rainfall in May
Washington, CA
- Average rainfall in May: 2.48"
The wettest month (with the highest rainfall) is March (7.09").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in May
Washington, CA
- Average rainfall days in May: 10.1 days
The month with the highest number of rainy days is April (11 days).
The month with the least rainy days is July (1.8 days).
Average snowfall in May
Washington, CA
- Average snowfall in May: 6.65"
The month with the highest snowfall is March (37.6").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Washington, CA
- Average snowfall days in May: 2.2 days
The month with the highest number of snowfall days is March (11.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Washington, CA
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in May
Washington, CA
- Average sunshine days in May: 18.3 days
The month with the most sunshine days is July (28 days).
The month with the least sunshine days is March (12.6 days).
Average UV index in May
Washington, CA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Washington, CA
- Average cloud cover in May: 26
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in May
Washington, CA
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March and April (5mi).
Washington, California, USA
Weather forecast for your location
2. Allow the app to use your location