April weather forecastUmtanum, WA
April
Weather in April
April in Umtanum, Washington, is a fresh spring month, with an average temperature varying between 36.1°F (2.3°C) and 54.5°F (12.5°C).Temperature
Umtanum's April weather brings a rise in high-temperatures, moving from a frosty 45.1°F (7.3°C) in March to a cool 54.5°F (12.5°C). Throughout the month of April, Umtanum observes an average nighttime temperature of 36.1°F (2.3°C).Humidity
The average relative humidity in April is 64%.Rainfall
In Umtanum, Washington, during April, the rain falls for 10.9 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Umtanum, during the entire year, the rain falls for 99.9 days and collects up to 8.66" (220mm) of precipitation.Snowfall
January through April, September through December are months with snowfall. April is the last month it regularly snows. During 1.2 snowfall days, in April, Umtanum aggregates 0.2" (5mm) of snow. In Umtanum, during the entire year, snow falls for 35.4 days and aggregates up to 15.59" (396mm) of snow.Daylight
In Umtanum, the average length of the day in April is 13h and 38min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:31 pm. On the last day of April, in Umtanum, sunrise is at 5:46 am and sunset at 8:11 pm PDT.
Sunshine
The average sunshine in April in Umtanum is 10.4h.UV index
The average daily maximum UV index in April in Umtanum is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in April interprets into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Umtanum, WA
- Average high temperature in April: 54.5°F
The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in April: 36.1°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in April
Umtanum, WA
- Average pressure in April: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in April
Umtanum, WA
- Average wind speed in April: 7.4mph
The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in April
Umtanum, WA
- Average humidity in April: 64%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in April
Umtanum, WA
- Average rainfall in April: 0.55"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in April
Umtanum, WA
- Average rainfall days in April: 10.9 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in April
Umtanum, WA
- Average snowfall in April: 0.2"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in April
Umtanum, WA
- Average snowfall days in April: 1.2 days
The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Umtanum, WA
- Average daylight in April: 13h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in April: 10h and 24min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
Average sunshine days in April
Umtanum, WA
- Average sunshine days in April: 15.8 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in April
Umtanum, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Umtanum, WA
- Average cloud cover in April: 32
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in April
Umtanum, WA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
