May weather forecastUmatilla, OR
May
Weather in May
May, the last month of the spring in Umatilla, is a pleasant month, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 49.8°F (9.9°C).Temperature
Umatilla's transition into May is marked by a temperature shift, moving from a refreshing 62.4°F (16.9°C) in April to a pleasant 72.1°F (22.3°C). Umatilla, after hot May days, encounters a marked drop to an average nighttime temperature of 49.8°F (9.9°C).Humidity
In Umatilla, the average relative humidity in May is 50%.Rainfall
In Umatilla, Oregon, in May, during 9.2 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, there are 106.1 rainfall days, and 7.76" (197mm) of precipitation is accumulated.Snowfall
In Umatilla, snow does not fall in April through August and October.Daylight
In Umatilla, the average length of the day in May is 14h and 58min.On the first day of the month, sunrise is at 5:42 am and sunset at 8:05 pm. On the last day of May, sunrise is at 5:10 am and sunset at 8:40 pm PDT.
Sunshine
The average sunshine in May in Umatilla is 11h.UV index
In Umatilla, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 5 suggests these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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
Umatilla, OR
- 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).
