May weather forecastSunnyside, WA
May
Weather in May
The last month of the spring, May, is a pleasant month in Sunnyside, Washington, with an average temperature ranging between max 70.3°F (21.3°C) and min 48.7°F (9.3°C).Temperature
With the onset of May, Sunnyside's weather sees a temperature rise, transitioning from a mild 60.4°F (15.8°C) in April to a pleasant 70.3°F (21.3°C). In May, the recorded average low-temperature in Sunnyside, of 48.7°F (9.3°C), exhibits a significant fall from the daytime highs.Humidity
The average relative humidity in May is 50%.Rainfall
The month with the most rainfall is May, when the rain falls for 10.3 days and typically aggregates up to 1.1" (28mm) of precipitation.Snowfall
In Sunnyside, snow does not fall in April through August and October.Daylight
The average length of the day in May is 15h and 1min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:09 pm. On the last day of May, sunrise is at 5:11 am and sunset at 8:44 pm PDT.
Sunshine
In Sunnyside, the average sunshine in May is 10.7h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 5 during May translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Sunnyside, WA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is December (25.3°F).
Average pressure in May
Sunnyside, WA
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in May
Sunnyside, WA
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5mph).
Average humidity in May
Sunnyside, WA
- Average humidity in May: 50%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in May
Sunnyside, WA
- Average rainfall in May: 1.1"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Sunnyside, WA
- Average rainfall days in May: 10.3 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in May
Sunnyside, WA
- Average snowfall in May: 0"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in May
Sunnyside, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Sunnyside, WA
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in May
Sunnyside, WA
- Average sunshine days in May: 18.7 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in May
Sunnyside, WA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Sunnyside, WA
- Average cloud cover in May: 28
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in May
Sunnyside, WA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
