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
In May, the meteorological conditions change with the average high-temperature moving from an enjoyable 61.3°F (16.3°C) in April to an agreeable 71.1°F (21.7°C). From significant daily highs, Grandview's nights in May cool down to an average low-temperature of 49.5°F (9.7°C).Humidity
In Grandview, the average relative humidity in May is 49%.Rainfall
May is the month with the most rainfall. Rain falls for 9.2 days and accumulates 0.71" (18mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in May is 15h and 1min.On the first day of May, sunrise is at 5:44 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:43 pm PDT.
Sunshine
In May, the average sunshine is 10.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 during May leads to these advisories:
Be vigilant - A duty to shield skin and eyes from injury exists. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Grandview have in May?
What is the UV index reading in May in Grandview?
Average temperature in May
Grandview, WA
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in May: 49.5°F
The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).
Average pressure in May
Grandview, 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
Grandview, WA
- Average wind speed in May: 7.6mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is December (5.2mph).
Average humidity in May
Grandview, WA
- Average humidity in May: 49%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is July (37%).
Average rainfall in May
Grandview, WA
- Average rainfall in May: 0.71"
The wettest month (with the highest rainfall) is May (0.71").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in May
Grandview, WA
- Average rainfall days in May: 9.2 days
The month with the highest number of rainy days is May (9.2 days).
The month with the least rainy days is July (4 days).
Average snowfall in May
Grandview, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Grandview, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (3.9 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
Grandview, 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 5min
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
Grandview, WA
- Average sunshine days in May: 19.9 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (18.7 days).
Average UV index in May
Grandview, 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
Grandview, WA
- Average cloud cover in May: 27
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in May
Grandview, WA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Grandview, Washington, USA
Weather forecast for your location
2. Allow the app to use your location