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
Dayton sees an increase in the average high-temperature with the arrival of May, moving from April's mild 55.8°F (13.2°C) to an enjoyable 65.3°F (18.5°C). During May, an average low-temperature of 44.2°F (6.8°C) is observed.Humidity
In Dayton, the average relative humidity in May is 63%.Rainfall
In May, the rain falls for 13.6 days. Throughout May, 1.77" (45mm) of precipitation is accumulated. In Dayton, Washington, during the entire year, the rain falls for 144.3 days and collects up to 15.75" (400mm) of precipitation.Snowfall
Months with snowfall in Dayton, Washington, are January through May, September, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Dayton aggregates 0.04" (1mm) of snow. In Dayton, during the entire year, snow falls for 28.4 days and aggregates up to 13.58" (345mm) of snow.Daylight
In Dayton, Washington, the average length of the day in May 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, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 during May translates into the following guidance:
Ensure safety - Recommendations to avert sunburn are presented. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May in Dayton?
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 4min
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).
Dayton, Washington, USA
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