May weather forecastPlymouth, WA
May
Weather in May
The last month of the spring, May, is an agreeable month in Plymouth, Washington, with an average temperature varying between 49.8°F (9.9°C) and 72.1°F (22.3°C).Temperature
In Plymouth, stepping into May brings a temperature increase, moving up from April's comfortable 62.4°F (16.9°C) to an agreeable 72.1°F (22.3°C). Throughout May, Plymouth notes a dramatic plunge from the daily high to an average low-temperature of 49.8°F (9.9°C).Humidity
In May, the average relative humidity is 50%.Rainfall
In May, the rain falls for 9.2 days. Throughout May, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 106.1 rainfall days, and 7.76" (197mm) of precipitation is accumulated.Snowfall
In Plymouth, snow does not fall in April through August and October.Daylight
In May, the average length of the day is 14h and 58min.On the first day of May, sunrise is at 5:42 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:40 pm PDT.
Sunshine
In May, the average sunshine is 11h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 5 during May translates into the following guidance:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Plymouth, WA
- Average high temperature in May: 72.1°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in May
Plymouth, WA
- Average pressure in May: 29.95"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
Plymouth, WA
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (6.2mph).
Average humidity in May
Plymouth, WA
- Average humidity in May: 50%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in May
Plymouth, WA
- Average rainfall in May: 0.75"
The wettest month (with the highest rainfall) is March (1.02").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in May
Plymouth, WA
- Average rainfall days in May: 9.2 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in May
Plymouth, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in May
Plymouth, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (3.2 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Plymouth, WA
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 11h and 0min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in May
Plymouth, WA
- Average sunshine days in May: 19.4 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14 days).
Average UV index in May
Plymouth, WA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Plymouth, WA
- Average cloud cover in May: 26
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in May
Plymouth, WA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
