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
May signals a shift in the average high-temperature, moving from April's cool 50.4°F (10.2°C) to an enjoyable 61.3°F (16.3°C). A marked difference from the daytime temperatures, Mount Vernon's nighttime temperature falls to an average low of 36.1°F (2.3°C) in May.Humidity
In Mount Vernon, the average relative humidity in May is 63%.Rainfall
In Mount Vernon, Oregon, in May, during 14.8 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, there are 127.7 rainfall days, and 17.09" (434mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Mount Vernon, Oregon. May is the last month it regularly snows. During 1.3 snowfall days, in May, Mount Vernon aggregates 0.28" (7mm) of snow. Throughout the year, in Mount Vernon, there are 62.5 snowfall days, and 39.17" (995mm) of snow is accumulated.Daylight
In Mount Vernon, the average length of the day in May is 14h and 49min.On the first day of the month, sunrise is at 5:45 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:15 am and sunset at 8:33 pm PDT.
Sunshine
The average sunshine in May is 10.8h.UV index
In Mount Vernon, Oregon, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 during May translates into the following directions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the temperature in May in Mount Vernon?
What is the average humidity in May in Mount Vernon?
How many days does it rain in May in Mount Vernon?
What is the last month it snows in Mount Vernon?
How many hours of daylight does Mount Vernon have in May?
When are sunrise and sunset in May in Mount Vernon?
How many hours of sunshine does Mount Vernon have in May?
How high is the UV index in May in Mount Vernon?
Average temperature in May
Mount Vernon, OR
- Average high temperature in May: 61.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (33.4°F).
- Average low temperature in May: 36.1°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 (19.6°F).
Average pressure in May
Mount Vernon, OR
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in May
Mount Vernon, OR
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in May
Mount Vernon, OR
- Average humidity in May: 63%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (42%).
Average rainfall in May
Mount Vernon, OR
- Average rainfall in May: 1.65"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in May
Mount Vernon, OR
- Average rainfall days in May: 14.8 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in May
Mount Vernon, OR
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (10.31").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Mount Vernon, OR
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Mount Vernon, OR
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 10h and 5min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in May
Mount Vernon, OR
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is February (9 days).
Average UV index in May
Mount Vernon, OR
- 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, March, October, November and December (UV index 2).
Average cloud cover in May
Mount Vernon, OR
- Average cloud cover in May: 31
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in May
Mount Vernon, OR
- 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 and December (4mi).
Mount Vernon, Oregon, USA
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