April weather forecastPortland, OR
April
Weather in April
April in Portland is synonymous with the full bloom of Spring. There is a noticeable increase in sunshine hours, making days longer and warmer. A reduced rainfall amount of about 3.11" (79mm) marks the transition from the wet spring toward the dryer summer. The rise in temperature and dwindling rainfall make this time of year perfect for outdoor exploration. The city basks in the gentleness of springtide, providing a captivating view of verdant landscapes.Temperature
With the onset of April, Portland's weather sees a minor temperature rise, transitioning from a fresh 52.5°F (11.4°C) in March to a mild 58.6°F (14.8°C). During April, the temperature is averaged to a low of 39.7°F (4.3°C) at night.Humidity
The average relative humidity in April is 77%.Rainfall
In April, the rain falls for 18.8 days. Throughout April, 3.11" (79mm) of precipitation is accumulated. In Portland, during the entire year, the rain falls for 173.1 days and collects up to 31.18" (792mm) of precipitation.Snowfall
In Portland, snow does not fall in April through October.Daylight
In Portland, the average length of the day in April is 13h and 34min.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 5:58 am and sunset at 8:16 pm PDT.
Sunshine
In Portland, the average sunshine in April is 7.7h.UV index
The average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The average daily UV index of 3 in April transforms into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Portland, OR
- Average high temperature in April: 58.6°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in April: 39.7°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in April
Portland, OR
- Average pressure in April: 30.06"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in April
Portland, OR
- Average wind speed in April: 4.8mph
The windiest month (with the highest average wind speed) is January (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in April
Portland, OR
- Average humidity in April: 77%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is August (63%).
Average rainfall in April
Portland, OR
- Average rainfall in April: 3.11"
The wettest month (with the highest rainfall) is December (4.53").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in April
Portland, OR
- Average rainfall days in April: 18.8 days
The month with the highest number of rainy days is March (20.4 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in April
Portland, OR
- Average snowfall in April: 0"
The month with the highest snowfall is March (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
Portland, OR
- Average snowfall days in April: 0.1 days
The month with the highest number of snowfall days is February (2.3 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
Portland, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in April
Portland, OR
- Average sunshine days in April: 8.8 days
The months with the most sunshine days are July and August (23.8 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in April
Portland, 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
Portland, OR
- Average cloud cover in April: 53
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in April
Portland, 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).
