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
The shift from April to May is marked by a slight increase in the average high-temperature, moving from a moderate 58.6°F (14.8°C) to a comfortable 66.7°F (19.3°C). Happy Valley anticipates a considerable daily temperature fluctuation in May, with low temperatures averaging a frosty 44.1°F (6.7°C).Humidity
In May, the average relative humidity is 72%.Rainfall
In Happy Valley, in May, during 13.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 172.2 rainfall days, and 31.3" (795mm) of precipitation is accumulated.Snowfall
In Happy Valley, snow does not fall in April through October.Daylight
In Happy Valley, Oregon, the average length of the day in May is 14h and 55min.On the first day of the month, sunrise is at 5:56 am and sunset at 8:17 pm. On the last day of May, sunrise is at 5:24 am and sunset at 8:50 pm PDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in May translates into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Happy Valley in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
What is the average length of the day in May in Happy Valley?
What time are sunrise and sunset in May?
How many hours of sunshine does Happy Valley have in May?
What is the UV index intensity in May?
Average temperature in May
Happy Valley, OR
- Average high temperature in May: 66.7°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in May: 44.1°F
The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in May
Happy Valley, OR
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in May
Happy Valley, OR
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in May
Happy Valley, OR
- Average humidity in May: 72%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in May
Happy Valley, OR
- Average rainfall in May: 1.77"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in May
Happy Valley, OR
- Average rainfall days in May: 13.9 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in May
Happy Valley, OR
- Average snowfall in May: 0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Happy Valley, OR
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.3 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
Happy Valley, OR
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in May
Happy Valley, OR
- Average sunshine days in May: 14.7 days
The month with the most sunshine days is July (23.9 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in May
Happy Valley, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Happy Valley, OR
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in May
Happy Valley, OR
- Average visibility in May: 5mi
The months with the highest visibility are July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, June, November and December (5mi).
Happy Valley, Oregon, USA
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