May weather forecastWalnut Grove, WA
May
Weather in May
The last month of the spring, May, is a comfortable month in Walnut Grove, Washington, with an average temperature varying between 43.7°F (6.5°C) and 66.6°F (19.2°C).Temperature
The onset of May brings a minor temperature shift, with the average high-temperature moving from a refreshing 58.1°F (14.5°C) in April to a comfortable 66.6°F (19.2°C). May presents a sharp fall from Walnut Grove's daytime highs to an average low-temperature of 43.7°F (6.5°C).Humidity
In Walnut Grove, the average relative humidity in May is 73%.Rainfall
In May, in Walnut Grove, Washington, the rain falls for 13.8 days. Throughout May, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 177.1 rainfall days, and 34.29" (871mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in May is 14h and 57min.On the first day of May, sunrise is at 5:56 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:52 pm PDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during May translates into the following guidance:
Take necessary precautions - Protection from skin and eye injury is mandatory. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Walnut Grove, WA
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in May: 43.7°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in May
Walnut Grove, WA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in May
Walnut Grove, WA
- Average wind speed in May: 4.1mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in May
Walnut Grove, WA
- Average humidity in May: 73%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in May
Walnut Grove, WA
- Average rainfall in May: 1.85"
The wettest month (with the highest rainfall) is December (5.08").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in May
Walnut Grove, WA
- Average rainfall days in May: 13.8 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.9 days).
Average snowfall in May
Walnut Grove, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Walnut Grove, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Walnut Grove, WA
- Average daylight in May: 14h and 54min
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 48min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and February (Average sunshine: 4h and 6min).
Average sunshine days in May
Walnut Grove, WA
- Average sunshine days in May: 15.6 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in May
Walnut Grove, WA
- 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
Walnut Grove, WA
- Average cloud cover in May: 46
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in May
Walnut Grove, WA
- Average visibility in May: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
