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
The start of May brings a subtle rise in the average high-temperature, moving from a mild 57.2°F (14°C) in April to an enjoyable 65.8°F (18.8°C). The average low-temperature of 43.5°F (6.4°C) in May represents a significant drop from the daily high.Humidity
In May, the average relative humidity is 74%.Rainfall
In Steilacoom, in May, during 13.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Steilacoom, during the entire year, the rain falls for 172.9 days and collects up to 30.08" (764mm) of precipitation.Snowfall
In Steilacoom, snow does not fall in April through October.Daylight
In May, the average length of the day is 15h and 7min.On the first day of May, sunrise is at 5:52 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:58 pm PDT.
Sunshine
In Steilacoom, the average sunshine in May is 8.8h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 4 suggests this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How many days does it rain in May in Steilacoom?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Steilacoom have in May?
What is the UV index intensity in May?
Average temperature in May
Steilacoom, WA
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in May: 43.5°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in May
Steilacoom, WA
- Average pressure in May: 30.03"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
Steilacoom, WA
- Average wind speed in May: 4.3mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in May
Steilacoom, WA
- Average humidity in May: 74%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).
Average rainfall in May
Steilacoom, WA
- Average rainfall in May: 1.57"
The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in May
Steilacoom, WA
- Average rainfall days in May: 13.3 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).
Average snowfall in May
Steilacoom, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Steilacoom, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.2 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
Steilacoom, 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 36min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in May
Steilacoom, WA
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in May
Steilacoom, 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, February, November and December (UV index 2).
Average cloud cover in May
Steilacoom, WA
- Average cloud cover in May: 45
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Steilacoom, WA
- Average visibility in May: 5mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
Steilacoom, Washington, USA
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