May weather forecastTumtum, WA
May
Weather in May
May, the last month of the spring in Tumtum, is a comfortable month, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 65.8°F (18.8°C).Temperature
As April transitions into May, Tumtum sees a rise in the average high-temperature, moving from a fresh 54.7°F (12.6°C) to an enjoyable 65.8°F (18.8°C). May nights bring a significant cooling from the heat of the day, with averages of 41.4°F (5.2°C).Humidity
The average relative humidity in May is 64%.Rainfall
In May, the rain falls for 12.8 days. Throughout May, 1.69" (43mm) of precipitation is accumulated. In Tumtum, during the entire year, the rain falls for 124.9 days and collects up to 17.44" (443mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Tumtum aggregates 0.04" (1mm) of snow. Throughout the year, there are 69.2 snowfall days, and 42.99" (1092mm) of snow is accumulated.Daylight
The average length of the day in May is 15h and 11min.On the first day of the month, sunrise is at 5:31 am and sunset at 8:04 pm. On the last day of May, sunrise is at 4:55 am and sunset at 8:41 pm PDT.
Sunshine
The average sunshine in May is 10.2h.UV index
In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 4 in May translates into this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Tumtum, WA
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (31.3°F).
- Average low temperature in May: 41.4°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in May
Tumtum, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in May
Tumtum, WA
- Average wind speed in May: 5.2mph
The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is December (4mph).
Average humidity in May
Tumtum, WA
- Average humidity in May: 64%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Tumtum, WA
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in May
Tumtum, WA
- Average rainfall days in May: 12.8 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in May
Tumtum, WA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (13.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Tumtum, WA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Tumtum, WA
- Average daylight in May: 15h and 12min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 10h and 12min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in May
Tumtum, WA
- Average sunshine days in May: 16.4 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in May
Tumtum, 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 February, November and December (UV index 1).
Average cloud cover in May
Tumtum, WA
- Average cloud cover in May: 34
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Tumtum, WA
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
