May weather forecastWaterville, WA
May
Weather in May
The last month of the spring, May, is a comfortable month in Waterville, Washington, with an average temperature ranging between max 65.3°F (18.5°C) and min 43.2°F (6.2°C).Temperature
With the onset of May, Waterville experiences a temperature shift, with the average high-temperature moving from a cool 54.3°F (12.4°C) in April to a refreshing 65.3°F (18.5°C). Waterville's temperature exhibits a stark contrast from daytime to nighttime, averaging lows of 43.2°F (6.2°C) in May.Humidity
The average relative humidity in May is 57%.Rainfall
In Waterville, Washington, during May, the rain falls for 9.5 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 99.9 rainfall days, and 10.47" (266mm) of precipitation is accumulated.Snowfall
May through August are months without snowfall.Daylight
In May, the average length of the day is 15h and 10min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:13 pm. On the last day of May, sunrise is at 5:06 am and sunset at 8:49 pm PDT.
Sunshine
The average sunshine in May is 10.9h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In May, the maximum UV index of 4 suggests this advice:
Heed the precautions - It is counselled to guard against solar damage. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Waterville, WA
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is December (30.2°F).
- Average low temperature in May: 43.2°F
The month with the highest average low temperature is August (55.8°F).
The coldest months (with the lowest average low temperature) are January and December (19°F).
Average pressure in May
Waterville, WA
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in May
Waterville, WA
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is June (6.1mph).
The calmest months (with the lowest average wind speed) are January and December (3.5mph).
Average humidity in May
Waterville, WA
- Average humidity in May: 57%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (43%).
Average rainfall in May
Waterville, WA
- Average rainfall in May: 1.1"
The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in May
Waterville, WA
- Average rainfall days in May: 9.5 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in May
Waterville, WA
- Average snowfall in May: 0"
The month with the highest snowfall is December (9.06").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in May
Waterville, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Waterville, WA
- Average daylight in May: 15h and 12min
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 30min).
- Average sunshine in May: 10h and 54min
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 6min).
Average sunshine days in May
Waterville, WA
- Average sunshine days in May: 18.2 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (13.2 days).
Average UV index in May
Waterville, 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, March, October, November and December (UV index 2).
Average cloud cover in May
Waterville, WA
- Average cloud cover in May: 27
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in May
Waterville, WA
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
