April weather forecastWilsonville, OR
April
Weather in April
April's weather in Wilsonville, Oregon, is renowned for bringing a boost of warmer temperatures and longer hours of sunshine. The receding rain, more hours of daylight, and a noticeable increase in the sunshine duration mark the transition further into the season of spring. Compared to March, the rainfall dips to 2.83" (72mm), which is the start of the dry season. A downward trend regarding relative humidity is also witnessed in April. Nevertheless, wind speeds remain consistent, suggesting a calm weather pattern.Temperature
Wilsonville perceives a slight temperature ascent during April, with average high-temperatures adjusting from a cool 51.8°F (11°C) in March to a moderate 58.1°F (14.5°C). Wilsonville, in the month of April, anticipates a consistent average low-temperature of 39°F (3.9°C).Humidity
In April, the average relative humidity is 80%.Rainfall
In Wilsonville, during April, the rain falls for 18.7 days and regularly aggregates up to 2.83" (72mm) of precipitation. Throughout the year, there are 173.8 rainfall days, and 29.96" (761mm) of precipitation is accumulated.Snowfall
In Wilsonville, snow does not fall in April through October.Daylight
The average length of the day in April is 13h and 33min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:39 pm. On the last day of April, sunrise is at 5:59 am and sunset at 8:16 pm PDT.
Sunshine
The average sunshine in April is 7.6h.UV index
In Wilsonville, the average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 3 in April suggests the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Wilsonville, OR
- Average high temperature in April: 58.1°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in April: 39°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in April
Wilsonville, OR
- Average pressure in April: 30.07"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in April
Wilsonville, OR
- Average wind speed in April: 4.9mph
The windiest months (with the highest average wind speed) are January and February (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in April
Wilsonville, OR
- Average humidity in April: 80%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is August (65%).
Average rainfall in April
Wilsonville, OR
- Average rainfall in April: 2.83"
The wettest month (with the highest rainfall) is December (4.49").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in April
Wilsonville, OR
- Average rainfall days in April: 18.7 days
The month with the highest number of rainy days is March (20.9 days).
The months with the least rainy days are July and August (4.4 days).
Average snowfall in April
Wilsonville, OR
- Average snowfall in April: 0"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Wilsonville, OR
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Wilsonville, OR
- Average daylight in April: 13h and 36min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in April: 7h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in April
Wilsonville, OR
- Average sunshine days in April: 9.3 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in April
Wilsonville, OR
- 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
Wilsonville, OR
- Average cloud cover in April: 54
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in April
Wilsonville, OR
- Average visibility in April: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
