May weather forecastLummi Island, WA
May
Weather in May
May, the last month of the spring in Lummi Island, is a comfortable month, with an average temperature ranging between max 61.5°F (16.4°C) and min 45.7°F (7.6°C).Temperature
With the onset of May, Lummi Island's average high-temperature sees a modest rise, moving from April's cool 54.1°F (12.3°C) to a comfortable 61.5°F (16.4°C). During the nights in May, Lummi Island observes an average low-temperature of 45.7°F (7.6°C).Humidity
The average relative humidity in May is 77%.Rainfall
In Lummi Island, in May, it is raining for 12.6 days, with typically 1.97" (50mm) of accumulated precipitation. In Lummi Island, during the entire year, the rain falls for 178.6 days and collects up to 37.32" (948mm) of precipitation.Snowfall
In Lummi Island, snow does not fall in May through October.Daylight
The average length of the day in May is 15h and 17min.On the first day of May in Lummi Island, sunrise is at 5:48 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 9:04 pm PDT.
Sunshine
In Lummi Island, the average sunshine in May is 9.4h.UV index
In Lummi Island, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In May, the maximum UV index of 4 suggests this advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. To guard against the harmful effects of the Sun, minimize exposure during midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Lummi Island, WA
- Average high temperature in May: 61.5°F
The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in May: 45.7°F
The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is February (35.2°F).
Average pressure in May
Lummi Island, WA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in May
Lummi Island, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is November (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in May
Lummi Island, WA
- Average humidity in May: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (74%).
Average rainfall in May
Lummi Island, WA
- Average rainfall in May: 1.97"
The wettest month (with the highest rainfall) is November (5.71").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in May
Lummi Island, WA
- Average rainfall days in May: 12.6 days
The month with the highest number of rainy days is November (20.1 days).
The month with the least rainy days is August (7.3 days).
Average snowfall in May
Lummi Island, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Lummi Island, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.8 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
Lummi Island, WA
- Average daylight in May: 15h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 9h and 24min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).
Average sunshine days in May
Lummi Island, WA
- Average sunshine days in May: 16.7 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is November (8.5 days).
Average UV index in May
Lummi Island, 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
Lummi Island, WA
- Average cloud cover in May: 39
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
Lummi Island, 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).
