April weather forecastStartup, WA
April
Weather in April
April is a fresh spring month in Startup, Washington, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 51.1°F (10.6°C).Temperature
Observing a slight rise in April, the average high-temperature shifts from March's chilly 45.1°F (7.3°C) to a fresh 51.1°F (10.6°C). The average low-temperature during April nights is an icy 34.7°F (1.5°C).Humidity
In April, the average relative humidity is 84%.Rainfall
In Startup, in April, during 21.2 rainfall days, 4.25" (108mm) of precipitation is typically accumulated. Throughout the year, there are 200.6 rainfall days, and 51.65" (1312mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.8 snowfall days, in April, Startup aggregates 0.35" (9mm) of snow. Throughout the year, there are 15.9 snowfall days, and 14.41" (366mm) of snow is accumulated.Daylight
In Startup, the average length of the day in April is 13h and 41min.On the first day of April, sunrise is at 6:43 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:19 pm PDT.
Sunshine
In April, the average sunshine in Startup is 7h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Startup. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 2 in April translates into this advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Startup, WA
- Average high temperature in April: 51.1°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in April: 34.7°F
The month with the highest average low temperature is August (48°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in April
Startup, WA
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in April
Startup, WA
- Average wind speed in April: 3.7mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in April
Startup, WA
- Average humidity in April: 84%
The months with the highest relative humidity are January, February and March (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in April
Startup, WA
- Average rainfall in April: 4.25"
The wettest month (with the highest rainfall) is January (7.8").
The driest month (with the least rainfall) is August (0.79").
Average rainfall days in April
Startup, WA
- Average rainfall days in April: 21.2 days
The month with the highest number of rainy days is March (22.3 days).
The month with the least rainy days is August (7.9 days).
Average snowfall in April
Startup, WA
- Average snowfall in April: 0.35"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Startup, WA
- Average snowfall days in April: 0.8 days
The month with the highest number of snowfall days is February (5.2 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
Startup, WA
- Average daylight in April: 13h and 42min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in April: 7h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in April
Startup, WA
- Average sunshine days in April: 7.3 days
The month with the most sunshine days is August (19.9 days).
The month with the least sunshine days is March (7 days).
Average UV index in April
Startup, WA
- Average UV index in April: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in April
Startup, WA
- Average cloud cover in April: 58
The months with the most cloud cover are March and December (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in April
Startup, WA
- Average visibility in April: 4mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
