Portland Weather in April

Portland, Oregon enjoys mild temperatures during April. Plus the cloudy, rainy weather begins to taper off.

This page gives detailed information on the typical April temperature, precipitation, sun, humidity, wind and storms for Portland. The numbers here are historical averages based on climate data gathered near the Portland International Airport, located a few miles from downtown Portland.

Temperature Weather iconTemperature

62 °F April average high 17 °C
43 °F April average low 6 °C
17 days 60 °F max. or more (16 °C)
9 days 40 °F min. or less (4 °C)

Nearly every day in April warms to over 50 degrees Fahrenheit (10 degrees Celsius) in Portland. The city averages one day this month when the thermometer reaches into the 80s °F (over 26 °C). Temperatures above 90 °F (32 °C) are not expected here this time of year.

At night, the thermometer can dip to 32 °F (0 °C) during April but it doesn't freeze every year.

Rainy Weather iconRain

3.6 in total precipitation 92 mm
17 days of rain

Half the time, Portland receives 2.5 to 5.0 inches (63 to 127 mm) of rainfall in April. One in four years has drier weather, while another one in four is wetter. None of the precipitation falls as snow this month.

Sunny Weather iconSun

52 % sunshine
3 days clear skies

The sun's rays reach the ground in Portland during 52 percent of daylight hours on average in April, for a total of 212 hours in the month. Typically on 3 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in April at Portland lasts for 13 hours and 33 minutes a day on average. The shortest day of the month is the 1st with 12 hours and 49 minutes of daylight. By the end of the month, the days have lengthened to 14:17 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

72 % April average humidity

The relative humidity in Portland during April usually peaks at 85 percent in the morning then drops to 55 percent by mid afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 81 85 85 70 59 55 63 74

Windy Weather iconWind

7.4 mph April wind speed average 11.9 kph

April is a little less windy than most other months in Portland.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
1 day with thunderstorms in April

A storm that soaks Portland in an inch (25 mm) or more of rain in one day during April happens about once a decade.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

Portland Weather
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