Climate averages 1991–2020
Portland weather
in April.
A cool, wet month: the 7th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Portland: daytime highs average 14.9°C and nights cool to about 5.4°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 115 mm of rain on roughly 16 days, which makes April a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 29 min on an average April day.
The nearest other city in this atlas is Beaverton (11 km away). In April its highs average 14.4°C, about as warm as Portland, with 115 mm of rain.
Among the 498 cities listed in the United States, Portland ranks joint 365th of 498 for the warmest April highs and joint 441st of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Portland is 4.5°C cooler than that mean.
From April to May, average highs rise by 4.0°C to 18.8°C, and monthly rainfall falls from 115 mm to 70 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Portland climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.4°C1.7°C | 1.7°C | 167 | 17.3 | 9.19 h |
| February | 10.1°C2.0°C | 2.0°C | 130 | 15.0 | 10.310 h |
| March | 12.4°C3.4°C | 3.4°C | 145 | 17.5 | 11.912 h |
| April, selected | 14.9°C5.4°C | 5.4°C | 115 | 16.1 | 13.513 h |
| May | 18.8°C8.8°C | 8.8°C | 70 | 11.1 | 14.915 h |
| June | 21.8°C11.3°C | 11.3°C | 43 | 7.6 | 15.616 h |
| July | 27.1°C14.1°C | 14.1°C | 12 | 2.3 | 15.315 h |
| August | 27.6°C14.6°C | 14.6°C | 14 | 2.6 | 14.114 h |
| September | 24.1°C12.3°C | 12.3°C | 42 | 6.2 | 12.613 h |
| October | 17.0°C8.1°C | 8.1°C | 106 | 11.8 | 11.011 h |
| November | 11.1°C4.2°C | 4.2°C | 174 | 17.3 | 9.610 h |
| December | 7.7°C1.7°C | 1.7°C | 193 | 18.0 | 8.89 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Beaverton in AprilUnited States · 11 kmHigh 14.4°C · Low 5.1°C · 115 mm rain
- Vancouver, United States in AprilUnited States · 13 kmHigh 14.5°C · Low 5.2°C · 142 mm rain
- Gresham in AprilUnited States · 19 kmHigh 14.0°C · Low 4.5°C · 142 mm rain
- Hillsboro in AprilUnited States · 24 kmHigh 14.6°C · Low 5.2°C · 115 mm rain
- Salem, United States in AprilUnited States · 70 kmHigh 14.6°C · Low 5.1°C · 92 mm rain
- Eugene in AprilUnited States · 167 kmHigh 14.4°C · Low 4.6°C · 130 mm rain
- Tacoma in AprilUnited States · 193 kmHigh 13.4°C · Low 4.9°C · 99 mm rain
- Bend in AprilUnited States · 195 kmHigh 11.7°C · Low 0.2°C · 46 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Portland) is explained once on the Portland year overview and on the Sources, method and limits page.
Beaverton lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.