May weather forecastValley, WA
May
Weather in May
May, the last month of the spring in Valley, is an enjoyable month, with an average temperature ranging between max 65.1°F (18.4°C) and min 39.6°F (4.2°C).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
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 12min
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 30min
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).
