Climate averages 1991–2020
Portland weather
in July.
A warm, very dry month: the 2nd warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Portland: daytime highs average 27.1°C and nights cool to about 14.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 12 mm of rain on roughly 2 days, which makes July a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 18 min on an average July day.
The nearest other city in this atlas is Beaverton (11 km away). In July its highs average 26.6°C, about as warm as Portland, with 12 mm of rain.
Among the 498 cities listed in the United States, Portland ranks joint 420th of 498 for the warmest July highs and joint 124th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Portland is 3.2°C cooler than that mean.
From July to August, average highs rise by 0.5°C to 27.6°C, and monthly rainfall rises from 12 mm to 14 mm.
The annual picture
July 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 | 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, selected | 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
July in nearby cities
- Beaverton in JulyUnited States · 11 kmHigh 26.6°C · Low 13.7°C · 12 mm rain
- Vancouver, United States in JulyUnited States · 13 kmHigh 26.4°C · Low 13.6°C · 16 mm rain
- Gresham in JulyUnited States · 19 kmHigh 25.5°C · Low 13.6°C · 14 mm rain
- Hillsboro in JulyUnited States · 24 kmHigh 26.6°C · Low 13.8°C · 11 mm rain
- Salem, United States in JulyUnited States · 70 kmHigh 27.6°C · Low 13.7°C · 7.9 mm rain
- Eugene in JulyUnited States · 167 kmHigh 27.0°C · Low 12.9°C · 8.6 mm rain
- Tacoma in JulyUnited States · 193 kmHigh 24.0°C · Low 13.8°C · 16 mm rain
- Bend in JulyUnited States · 195 kmHigh 27.7°C · Low 11.3°C · 14 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.