April weather forecastSunnyside, WA
April
Weather in April
April in Sunnyside, Washington, is a moderate spring month, with an average temperature varying between 60.4°F (15.8°C) and 41.4°F (5.2°C).Temperature
The arrival of April brings an increase in high-temperatures, moving from a cool 50.9°F (10.5°C) in March to a moderate 60.4°F (15.8°C). Sunnyside observes an average low-temperature of 41.4°F (5.2°C) during April.Humidity
The average relative humidity in April is 55%.Rainfall
In April, the rain falls for 10.4 days. Throughout April, 0.51" (13mm) of precipitation is accumulated. In Sunnyside, Washington, during the entire year, the rain falls for 104.5 days and collects up to 8.23" (209mm) of precipitation.Snowfall
April through August and October are months without snowfall.Daylight
The average length of the day in April is 13h and 36min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:29 pm. On the last day of April, sunrise is at 5:46 am and sunset at 8:08 pm PDT.
Sunshine
In Sunnyside, the average sunshine in April is 9.9h.UV index
In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 4 in April transforms into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sunnyside, WA
- Average high temperature in April: 60.4°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is December (25.3°F).
Average pressure in April
Sunnyside, WA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in April
Sunnyside, WA
- Average wind speed in April: 8.3mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5mph).
Average humidity in April
Sunnyside, WA
- Average humidity in April: 55%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in April
Sunnyside, WA
- Average rainfall in April: 0.51"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in April
Sunnyside, WA
- Average rainfall days in April: 10.4 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in April
Sunnyside, WA
- Average snowfall in April: 0"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in April
Sunnyside, WA
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is December (5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in April /
Average sunshine in April
Sunnyside, WA
- Average daylight in April: 13h and 36min
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 April: 9h 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 54min).
Average sunshine days in April
Sunnyside, WA
- Average sunshine days in April: 17.2 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in April
Sunnyside, WA
- Average UV index in April: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in April
Sunnyside, WA
- Average cloud cover in April: 34
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in April
Sunnyside, WA
- Average visibility in April: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
