May weather forecastDes Moines, WA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Des Moines, Washington, with an average temperature ranging between min 44.4°F (6.9°C) and max 65.3°F (18.5°C).Temperature
The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a refreshing 56.7°F (13.7°C) in April to an enjoyable 65.3°F (18.5°C). In Des Moines, the May nights cool down to an average low of 44.4°F (6.9°C).Humidity
The average relative humidity in May is 74%.Rainfall
In Des Moines, Washington, during May, the rain falls for 12.3 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Des Moines, Washington, during the entire year, the rain falls for 138.2 days and collects up to 14.09" (358mm) of precipitation.Snowfall
In Des Moines, snow does not fall in April through October.Ocean temperature
In May, the average ocean temperature is 46.8°F (8.2°C).Note: Without suitable protection, venturing into 46.8°F (8.2°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.
Daylight
In May, the average length of the day is 15h and 8min.On the first day of May in Des Moines, sunrise is at 5:51 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 8:57 pm PDT.
Sunshine
The average sunshine in May is 9h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 4 in May suggests the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. It's recommended to limit sun exposure when its radiation is at its peak during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Des Moines, WA
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in May: 44.4°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in May
Des Moines, WA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in May
Des Moines, WA
- Average wind speed in May: 4.1mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).
Average humidity in May
Des Moines, WA
- Average humidity in May: 74%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).
Average rainfall in May
Des Moines, WA
- Average rainfall in May: 1.06"
The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in May
Des Moines, WA
- Average rainfall days in May: 12.3 days
The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in May
Des Moines, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Des Moines, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in May
Des Moines, WA
- Average sea temperature in May: 46.8°F
The best month for swimming (with the highest average sea temperature) is August (53.7°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).
Average daylight in May /
Average sunshine in May
Des Moines, WA
- Average daylight in May: 15h and 6min
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 0min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in May
Des Moines, WA
- Average sunshine days in May: 15.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in May
Des Moines, WA
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Des Moines, WA
- Average cloud cover in May: 44
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in May
Des Moines, WA
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
