Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Walla's transition into April is noticed by a slight rise in the average high-temperature, advancing from a chilly 49.5°F (9.7°C) in March to a refreshing 56.8°F (13.8°C). An average temperature of 39°F (3.9°C) marks the nights in April.Humidity
The average relative humidity in April is 66%.Rainfall
In Walla, in April, during 15.3 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 141.7 rainfall days, and 15.12" (384mm) of precipitation is accumulated.Snowfall
Months with snowfall in Walla are January through April, September, November and December. April is the last month it regularly snows. During 0.5 snowfall days, in April, Walla aggregates 0.12" (3mm) of snow. In Walla, Washington, during the entire year, snow falls for 21.1 days and aggregates up to 9.09" (231mm) of snow.Daylight
The average length of the day in April in Walla is 13h and 35min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:22 pm. On the last day of April, sunrise is at 5:40 am and sunset at 8:00 pm PDT.
Sunshine
The average sunshine in April is 10.1h.UV index
The average daily maximum UV index in April in Walla is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 3 in April interprets into the following advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Walla?
What is the average humidity in April in Walla?
How many days does it rain in April in Walla?
What is the last month it snows in Walla?
How many hours of daylight does Walla have in April?
What time are sunrise and sunset in April in Walla?
How long on average sun shines in April in Walla?
What is the UV index intensity in April in Walla?
Average temperature in April
Walla Walla, WA
- Average high temperature in April: 56.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (37.4°F).
- Average low temperature in April: 39°F
The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (27°F).
Average pressure in April
Walla Walla, WA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in April
Walla Walla, WA
- Average wind speed in April: 7.9mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).
Average humidity in April
Walla Walla, WA
- Average humidity in April: 66%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (39%).
Average rainfall in April
Walla Walla, WA
- Average rainfall in April: 1.26"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in April
Walla Walla, WA
- Average rainfall days in April: 15.3 days
The month with the highest number of rainy days is March (17.4 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in April
Walla Walla, WA
- Average snowfall in April: 0.12"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in April
Walla Walla, WA
- Average snowfall days in April: 0.5 days
The months with the highest number of snowfall days are February and December (6.1 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in April /
Average sunshine in April
Walla Walla, WA
- Average daylight in April: 13h and 4min
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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in April
Walla Walla, WA
- Average sunshine days in April: 12 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is February (10 days).
Average UV index in April
Walla Walla, WA
- Average UV index in April: 3
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 April
Walla Walla, WA
- Average cloud cover in April: 34
The months with the most cloud cover are January, February and December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in April
Walla Walla, WA
- Average visibility in April: 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).
Walla Walla, Washington, USA
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