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 indicates a change in the average high-temperature, moving up from a fresh 54.1°F (12.3°C) in April to an enjoyable 65.1°F (18.4°C). Trentwood's nighttime average of 41.2°F (5.1°C) during May reflects a substantial decrease from the daytime temperature.Humidity
In Trentwood, the average relative humidity in May is 65%.Rainfall
In Trentwood, during May, the rain falls for 12.7 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Trentwood, during the entire year, the rain falls for 125.4 days and collects up to 17.28" (439mm) 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, Trentwood aggregates 0.04" (1mm) of snow. In Trentwood, during the entire year, snow falls for 56.4 days and aggregates up to 37.4" (950mm) of snow.Daylight
In Trentwood, the average length of the day in May is 15h and 10min.On the first day of the month, sunrise is at 5:29 am and sunset at 8:01 pm. On the last day of May, sunrise is at 4:54 am and sunset at 8:38 pm PDT.
Sunshine
The average sunshine in May is 10.3h.UV index
In Trentwood, 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 exposure to the Sun's UV rays for the average person.Note: In May, a regular UV index of 4 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May in Trentwood?
When is the sunrise / sunset in May?
How many hours of sunshine does Trentwood have in May?
What is the UV index reading in May?
Average temperature in May
Trentwood, WA
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in May: 41.2°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure in May
Trentwood, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Trentwood, WA
- Average wind speed in May: 5.5mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).
Average humidity in May
Trentwood, WA
- Average humidity in May: 65%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Trentwood, WA
- Average rainfall in May: 1.61"
The wettest month (with the highest rainfall) is January (2.28").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in May
Trentwood, WA
- Average rainfall days in May: 12.7 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.1 days).
Average snowfall in May
Trentwood, WA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (10.51").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Trentwood, WA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Trentwood, 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 30min).
- Average sunshine in May: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 48min).
Average sunshine days in May
Trentwood, WA
- Average sunshine days in May: 16.4 days
The month with the most sunshine days is July (24.3 days).
The month with the least sunshine days is March (10.3 days).
Average UV index in May
Trentwood, WA
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Trentwood, WA
- Average cloud cover in May: 34
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 13).
Average visibility in May
Trentwood, WA
- 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).
Trentwood, Washington, USA
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