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
With the arrival of May, the average high-temperature transitions from a chilly 47.8°F (8.8°C) in April to a refreshing 59.9°F (15.5°C). From the heights of the May heat, Plain records a mean nighttime low of 37.9°F (3.3°C).Humidity
In May, the average relative humidity in Plain is 70%.Rainfall
In Plain, in May, during 15.3 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, in Plain, there are 159.9 rainfall days, and 25.63" (651mm) of precipitation is accumulated.Snowfall
Months with snowfall in Plain, Washington, are January through May, September through December. May is the last month it regularly snows in Plain. During 0.3 snowfall days, in May, Plain aggregates 0.04" (1mm) of snow. Throughout the year, there are 73.4 snowfall days, and 57.99" (1473mm) of snow is accumulated.Daylight
The average length of the day in May in Plain is 15h and 11min.On the first day of the month, sunrise is at 5:43 am and sunset at 8:15 pm. On the last day of May, in Plain, sunrise is at 5:08 am and sunset at 8:52 pm PDT.
Sunshine
In May, the average sunshine in Plain is 10.7h.UV index
In Plain, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 4 in May leads to these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Plain?
What is the average humidity in May in Plain?
How many days does it rain in May in Plain?
What is the last month it snows in Plain?
How many hours of daylight does Plain have in May?
What time are sunrise and sunset in May in Plain?
How many hours of sunshine does Plain have in May?
What is the UV index intensity in May in Plain?
Average temperature in May
Plain, WA
- Average high temperature in May: 59.9°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (30.6°F).
- Average low temperature in May: 37.9°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).
Average pressure in May
Plain, WA
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).
Average wind speed in May
Plain, WA
- Average wind speed in May: 5mph
The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in May
Plain, WA
- Average humidity in May: 70%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are July and August (56%).
Average rainfall in May
Plain, WA
- Average rainfall in May: 1.65"
The wettest month (with the highest rainfall) is January (4.33").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in May
Plain, WA
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is March (18.2 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in May
Plain, WA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Plain, WA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is December (17 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Plain, WA
- Average daylight in May: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Plain, WA
- Average sunshine days in May: 12.5 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in May
Plain, 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 and February (UV index 1).
Average cloud cover in May
Plain, WA
- Average cloud cover in May: 33
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in May
Plain, 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, February, March, November and December (4mi).
Plain, Washington, USA
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