May weather forecastCascade Valley, WA
May
Weather in May
The last month of the spring, May, is a pleasant month in Cascade Valley, Washington, with an average temperature fluctuating between 49.1°F (9.5°C) and 70.9°F (21.6°C).Temperature
The start of May brings a shift in the average high-temperature, increasing from April's refreshing 60.6°F (15.9°C) to an agreeable 70.9°F (21.6°C). A sharp divergence from daytime highs is noted during the month of May, with the average nighttime temperature settling at a frosty 49.1°F (9.5°C).Humidity
The average relative humidity in May is 49%.Rainfall
In Cascade Valley, in May, it is raining for 9.8 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 103.1 rainfall days, and 7.8" (198mm) of precipitation is accumulated.Snowfall
In Cascade Valley, snow does not fall in May through August and October.Daylight
In May, the average length of the day is 15h and 7min.On the first day of May, sunrise is at 5:39 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:05 am and sunset at 8:44 pm PDT.
Sunshine
The average sunshine in May is 10.8h.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 exposure to the Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Cascade Valley, WA
- Average high temperature in May: 70.9°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in May: 49.1°F
The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in May
Cascade Valley, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Cascade Valley, WA
- Average wind speed in May: 7mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are January and December (5.5mph).
Average humidity in May
Cascade Valley, WA
- Average humidity in May: 49%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in May
Cascade Valley, WA
- Average rainfall in May: 0.87"
The wettest month (with the highest rainfall) is January (1.02").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in May
Cascade Valley, WA
- Average rainfall days in May: 9.8 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in May
Cascade Valley, WA
- Average snowfall in May: 0"
The month with the highest snowfall is December (2.6").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in May
Cascade Valley, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (6.8 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Cascade Valley, 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 36min).
- Average sunshine in May: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in May
Cascade Valley, WA
- Average sunshine days in May: 19.1 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is March (14.2 days).
Average UV index in May
Cascade Valley, 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
Cascade Valley, WA
- Average cloud cover in May: 26
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in May
Cascade Valley, WA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
