May weather forecastDayton, WA
May
Weather in May
May, the last month of the spring in Dayton, is a refreshing month, with temperature in the range of an average high of 65.3°F (18.5°C) and an average low of 44.2°F (6.8°C).Temperature
Dayton in May sees a temperature change, with average high-temperatures moving from 55.8°F (13.2°C) in April to a still refreshing 65.3°F (18.5°C). Dayton's average low-temperature for the month of May records at a chilly 44.2°F (6.8°C).Humidity
In May, the average relative humidity is 63%.Rainfall
In Dayton, in May, it is raining for 13.6 days, with typically 1.77" (45mm) of accumulated precipitation. In Dayton, during the entire year, the rain falls for 144.3 days and collects up to 15.75" (400mm) of precipitation.Snowfall
January through May, September, November and December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Dayton aggregates 0.04" (1mm) of snow. Throughout the year, there are 28.4 snowfall days, and 13.58" (345mm) of snow is accumulated.Daylight
In May, the average length of the day is 15h and 1min.On the first day of May, sunrise is at 5:36 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:03 am and sunset at 8:36 pm PDT.
Sunshine
In Dayton, the average sunshine in May is 10.6h.UV index
In Dayton, Washington, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: During May, 4 as the daily maximum UV index converts into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Dayton, WA
- Average high temperature in May: 65.3°F
The warmest month (with the highest average high temperature) is August (83.7°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in May: 44.2°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in May
Dayton, WA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in May
Dayton, WA
- Average wind speed in May: 7.1mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).
Average humidity in May
Dayton, WA
- Average humidity in May: 63%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (39%).
Average rainfall in May
Dayton, WA
- Average rainfall in May: 1.77"
The wettest month (with the highest rainfall) is December (2.05").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in May
Dayton, WA
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is July (5.3 days).
Average snowfall in May
Dayton, WA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in May
Dayton, WA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Dayton, WA
- 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: 10h and 36min
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: 5h and 6min).
Average sunshine days in May
Dayton, WA
- Average sunshine days in May: 14 days
The month with the most sunshine days is July (24 days).
The month with the least sunshine days is February (10 days).
Average UV index in May
Dayton, WA
- Average UV index in May: 4
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
Dayton, WA
- Average cloud cover in May: 30
The months with the most cloud cover are January and February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in May
Dayton, WA
- 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).
