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
In Castle Rock, the average high-temperature in April slightly rises, from a fresh 50°F (10°C) in March, to a refreshing 55.9°F (13.3°C). Castle Rock's nighttime temperature in April falls to an average of 36.5°F (2.5°C).Humidity
In Castle Rock, the average relative humidity in April is 83%.Rainfall
In Castle Rock, in April, during 16.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Castle Rock, during the entire year, the rain falls for 157.3 days and collects up to 16.54" (420mm) of precipitation.Snowfall
In Castle Rock, snow does not fall in April through October.Daylight
The average length of the day in April in Castle Rock is 13h and 36min.On the first day of April in Castle Rock, sunrise is at 6:49 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 5:57 am and sunset at 8:19 pm PDT.
Sunshine
In Castle Rock, the average sunshine in April is 6.6h.UV index
In Castle Rock, Washington, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: During April, 3 as the daily maximum UV index converts into the following advice:
Prioritize safety - Suggestions to prevent sun damage are offered. To avoid the Sun's strongest rays, limit exposure around the mid-day period. During bright days, sunglasses that offer UVA and UVB defense are recommended. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Castle Rock in April?
What is the average humidity in April in Castle Rock?
How many days does it rain in April in Castle Rock?
When it does not snow in Castle Rock?
Does it snow in Castle Rock in April?
How many hours of daylight does Castle Rock have in April?
When is the sunrise / sunset in April in Castle Rock?
How many hours of sunshine does Castle Rock have in April?
How high is the UV index in April in Castle Rock?
Average temperature in April
Castle Rock, WA
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (42.4°F).
- Average low temperature in April: 36.5°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (32.5°F).
Average pressure in April
Castle Rock, WA
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in April
Castle Rock, WA
- Average wind speed in April: 4.3mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity in April
Castle Rock, WA
- Average humidity in April: 83%
The months with the highest relative humidity are February and November (89%).
The months with the lowest relative humidity are July and August (73%).
Average rainfall in April
Castle Rock, WA
- Average rainfall in April: 1.57"
The wettest month (with the highest rainfall) is January (2.28").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in April
Castle Rock, WA
- Average rainfall days in April: 16.9 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is July (6.1 days).
Average snowfall in April
Castle Rock, WA
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Castle Rock, WA
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is February (2.4 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
Castle Rock, 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: 6h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in April
Castle Rock, WA
- Average sunshine days in April: 10.5 days
The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is April (10.5 days).
Average UV index in April
Castle Rock, 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
Castle Rock, WA
- Average cloud cover in April: 60
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in April
Castle Rock, WA
- Average visibility in April: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Castle Rock, Washington, USA
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