May weather forecastWallula, WA
May
Weather in May
The last month of the spring, May, is a pleasant month in Wallula, Washington, with an average temperature ranging between min 50.5°F (10.3°C) and max 73°F (22.8°C).Temperature
May's arrival signals an increase in average high-temperatures, moving from April's enjoyable 63.1°F (17.3°C) to an agreeable 73°F (22.8°C). May nights in Wallula present a stark temperature decrease to a fresh 50.5°F (10.3°C).Humidity
The average relative humidity in May in Wallula is 50%.Rainfall
In Wallula, in May, during 8.9 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 102.8 rainfall days, and 7.32" (186mm) of precipitation is accumulated.Snowfall
In Wallula, Washington, snow does not fall in April through October.Daylight
The average length of the day in May in Wallula is 14h and 59min.On the first day of the month, sunrise is at 5:40 am and sunset at 8:04 pm. On the last day of May, in Wallula, sunrise is at 5:08 am and sunset at 8:38 pm PDT.
Sunshine
In May, the average sunshine is 11.1h.UV index
In Wallula, Washington, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 during May translates into the following directions:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Wallula, WA
- Average high temperature in May: 73°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in May: 50.5°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.9°F).
Average pressure in May
Wallula, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Wallula, WA
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).
Average humidity in May
Wallula, WA
- Average humidity in May: 50%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).
Average rainfall in May
Wallula, WA
- Average rainfall in May: 0.67"
The wettest months (with the highest rainfall) are March and December (0.94").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in May
Wallula, WA
- Average rainfall days in May: 8.9 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in May
Wallula, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Wallula, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Wallula, 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: 11h and 6min
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 24min).
Average sunshine days in May
Wallula, WA
- Average sunshine days in May: 19.8 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in May
Wallula, WA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Wallula, WA
- Average cloud cover in May: 26
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
Wallula, WA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
