April weather forecastUnion, WA
April
Weather in April
April in Union, Washington, is a fresh spring month, with an average temperature varying between 54.9°F (12.7°C) and 37°F (2.8°C).Temperature
April signals a minor shift in the average high-temperature, moving from March's frosty 49.1°F (9.5°C) to a fresh 54.9°F (12.7°C). April nights experience a consistent temperature drop to a wintry 37°F (2.8°C).Humidity
In April, the average relative humidity is 83%.Rainfall
In Union, during April, the rain falls for 19.3 days and regularly aggregates up to 2.87" (73mm) of precipitation. In Union, during the entire year, the rain falls for 185.4 days and collects up to 42.87" (1089mm) of precipitation.Snowfall
In Union, snow does not fall in April through October.Daylight
The average length of the day in April in Union is 13h and 40min.On the first day of April, sunrise is at 6:49 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 8:23 pm PDT.
Sunshine
The average sunshine in April is 7.5h.UV index
In Union, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 3 in April translates into these instructions:
Heed the precautions - It is counselled to guard against solar damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Union, WA
- Average high temperature in April: 54.9°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in April: 37°F
The month with the highest average low temperature is August (50.4°F).
The coldest month (with the lowest average low temperature) is February (32.7°F).
Average pressure in April
Union, WA
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in April
Union, WA
- Average wind speed in April: 4.2mph
The windiest month (with the highest average wind speed) is March (4.3mph).
The calmest month (with the lowest average wind speed) is September (3.4mph).
Average humidity in April
Union, WA
- Average humidity in April: 83%
The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is July (72%).
Average rainfall in April
Union, WA
- Average rainfall in April: 2.87"
The wettest month (with the highest rainfall) is January (7.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in April
Union, WA
- Average rainfall days in April: 19.3 days
The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in April
Union, WA
- Average snowfall in April: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Union, WA
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Union, WA
- Average daylight in April: 13h and 42min
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 April: 7h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in April
Union, WA
- Average sunshine days in April: 9.2 days
The month with the most sunshine days is July (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in April
Union, WA
- Average UV index in April: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Union, WA
- Average cloud cover in April: 55
The months with the most cloud cover are January and December (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in April
Union, WA
- Average visibility in April: 4mi
The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, October, November and December (4mi).
