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
Entering April, Roy notices a subtle temperature elevation, with the average high-temperature advancing from March's fresh 51.4°F (10.8°C) to a mild 57°F (13.9°C). Nighttime temperature in Roy, Washington, experiences an average drop to a cold 39°F (3.9°C) in April.Humidity
In Roy, the average relative humidity in April is 80%.Rainfall
In April, in Roy, the rain falls for 17.8 days. Throughout April, 2.36" (60mm) of precipitation is accumulated. In Roy, Washington, during the entire year, the rain falls for 174.2 days and collects up to 31.06" (789mm) of precipitation.Snowfall
Months with snowfall in Roy are January through April, November and December. April is the last month it regularly snows. During 0.2 snowfall days, in April, Roy aggregates 0.04" (1mm) of snow. Throughout the year, there are 7.9 snowfall days, and 4.45" (113mm) of snow is accumulated.Daylight
In Roy, the average length of the day in April is 13h and 38min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:40 pm. On the last day of April, sunrise is at 5:54 am and sunset at 8:20 pm PDT.
Sunshine
In Roy, Washington, the average sunshine in April is 7.7h.UV index
In April, the average daily maximum UV index in Roy is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In April, the maximum UV index of 3 translates into these guidelines:
Prioritize safety - Suggestions to prevent sun damage are offered. It's recommended to limit sun exposure when its radiation is at its peak during midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Roy in April?
What is the average humidity in April in Roy?
How much does it rain in Roy in April?
What is the last month it snows in Roy?
What is the average length of the day in April in Roy?
When is the sunrise / sunset in April in Roy?
How long on average sun shines in April in Roy?
How high is the UV index in April in Roy?
Average temperature in April
Roy, WA
- Average high temperature in April: 57°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in April: 39°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is February (34°F).
Average pressure in April
Roy, WA
- Average pressure in April: 30.05"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in April
Roy, WA
- Average wind speed in April: 4.7mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in April
Roy, WA
- Average humidity in April: 80%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is July (69%).
Average rainfall in April
Roy, WA
- Average rainfall in April: 2.36"
The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in April
Roy, WA
- Average rainfall days in April: 17.8 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in April
Roy, WA
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Roy, WA
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (2.8 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
Roy, WA
- Average daylight in April: 13h and 4min
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: 7h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in April
Roy, WA
- Average sunshine days in April: 10.9 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is November (9.1 days).
Average UV index in April
Roy, 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, November and December (UV index 2).
Average cloud cover in April
Roy, WA
- Average cloud cover in April: 53
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in April
Roy, WA
- Average visibility in April: 5mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
Roy, Washington, USA
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