May weather forecastMount Rainier, MD
May
Weather in May
The weather in Mount Rainier in May manifests as pleasant conditions and the typical signs of late spring. Characterized by a complete absence of snowfall and increasing warm temperatures, May's weather is distinctly different from April’s. The humidity levels in May are notably high, making it the month with the highest humidity of the year. Deviating from May’s weather patterns, June features slightly cooler temperatures and a lesser amount of rain. May’s weather delineates the seasonal transition from spring to summer in Mount Rainier.Temperature
Mount Rainier's May weather brings a rise in high-temperatures, moving from a refreshing 64.8°F (18.2°C) in April to a moderately hot 73.9°F (23.3°C). May in Mount Rainier generally records an average low-temperature of 57°F (13.9°C).Humidity
The months with the highest humidity are May, October and December, with an average relative humidity of 76%.Rainfall
In Mount Rainier, during May, the rain falls for 17.9 days and regularly aggregates up to 2.99" (76mm) of precipitation. Throughout the year, there are 157.9 rainfall days, and 31.14" (791mm) of precipitation is accumulated.Snowfall
In Mount Rainier, snow does not fall in May through November.Daylight
In May, the average length of the day is 14h and 19min.On the first day of May, sunrise is at 6:08 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:27 pm EDT.
Sunshine
The average sunshine in May is 8.9h.UV index
The months with the highest UV index in Mount Rainier are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 6 in May suggests the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mount Rainier, MD
- Average high temperature in May: 73.9°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in May: 57°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in May
Mount Rainier, MD
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Mount Rainier, MD
- Average wind speed in May: 6.8mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Mount Rainier, MD
- Average humidity in May: 76%
The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in May
Mount Rainier, MD
- Average rainfall in May: 2.99"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in May
Mount Rainier, MD
- Average rainfall days in May: 17.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in May
Mount Rainier, MD
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in May
Mount Rainier, MD
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (4.1 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
Mount Rainier, MD
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in May
Mount Rainier, MD
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in May
Mount Rainier, MD
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in May
Mount Rainier, MD
- Average cloud cover in May: 43
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in May
Mount Rainier, MD
- 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).
