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
May's onset is marked by a temperature increase, moving from a cool 53.4°F (11.9°C) in April to a refreshing 65.1°F (18.4°C). Despite the drastic temperature difference, Valley records an average nighttime low of 39.6°F (4.2°C) throughout May.Humidity
In Valley, the average relative humidity in May is 65%.Rainfall
In Valley, during May, the rain falls for 14.8 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 141.6 rainfall days, and 17.56" (446mm) of precipitation is accumulated.Snowfall
May through August are months without snowfall.Daylight
In Valley, the average length of the day in May is 15h and 13min.On the first day of the month, sunrise is at 5:30 am and sunset at 8:05 pm. On the last day of May, sunrise is at 4:54 am and sunset at 8:42 pm PDT.
Sunshine
In May, the average sunshine in Valley, Washington, is 10.5h.UV index
The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 during May translates into the following guidance:
Prioritize safety - Suggestions to prevent sun damage are offered. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Valley in May?
What is the average humidity in May in Valley?
How many days does it rain in May in Valley?
When it does not snow in Valley?
Does it snow in Valley in May?
How many hours of daylight does Valley have in May?
When is the sunrise / sunset in May in Valley?
How long on average sun shines in May in Valley?
What is the UV index reading in May in Valley?
Average temperature in May
Valley, WA
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is August (83.1°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in May: 39.6°F
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).
Average pressure in May
Valley, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in May
Valley, WA
- Average wind speed in May: 4.4mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).
Average humidity in May
Valley, WA
- Average humidity in May: 65%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in May
Valley, WA
- Average rainfall in May: 1.93"
The wettest month (with the highest rainfall) is January (2.2").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in May
Valley, WA
- Average rainfall days in May: 14.8 days
The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in May
Valley, WA
- Average snowfall in May: 0"
The month with the highest snowfall is January (10.47").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in May
Valley, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (15.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Valley, 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: 10h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Valley, WA
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is March (9.3 days).
Average UV index in May
Valley, WA
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Valley, WA
- Average cloud cover in May: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Valley, WA
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
Valley, Washington, USA
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