May weather forecastMountlake Terrace, WA
May
Weather in May
The last month of the spring, May, is a comfortable month in Mountlake Terrace, Washington, with an average temperature ranging between min 45.5°F (7.5°C) and max 62.8°F (17.1°C).Temperature
May brings a slight rise in Mountlake Terrace's average high-temperature, moving from a cool 55.2°F (12.9°C) in April to a comfortable 62.8°F (17.1°C). Throughout the month of May, the average temperature dips to a frosty 45.5°F (7.5°C) at night.Humidity
In May, the average relative humidity is 76%.Rainfall
In Mountlake Terrace, in May, during 13.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 173 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in May in Mountlake Terrace, Washington, is 15h and 11min.On the first day of the month, sunrise is at 5:49 am and sunset at 8:22 pm. On the last day of May, in Mountlake Terrace, sunrise is at 5:14 am and sunset at 8:59 pm PDT.
Sunshine
In May, the average sunshine is 9.5h.UV index
In Mountlake Terrace, Washington, 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 the average person.Note: In May, the maximum UV index of 4 suggests 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mountlake Terrace, WA
- Average high temperature in May: 62.8°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in May: 45.5°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.8°F).
Average pressure in May
Mountlake Terrace, WA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in May
Mountlake Terrace, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is November (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in May
Mountlake Terrace, WA
- Average humidity in May: 76%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is July (72%).
Average rainfall in May
Mountlake Terrace, WA
- Average rainfall in May: 1.57"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in May
Mountlake Terrace, WA
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in May
Mountlake Terrace, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Mountlake Terrace, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Mountlake Terrace, WA
- Average daylight in May: 15h and 12min
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: 9h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Mountlake Terrace, WA
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is August (22.5 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in May
Mountlake Terrace, WA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Mountlake Terrace, WA
- Average cloud cover in May: 40
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Mountlake Terrace, 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).
