Average annual temperature is 13.8 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -8.1 °C
Number of sunny days: 172 days
Number of rainy days: 188 days
Number of snow days: 5 days
Look at detailed online map of Portland
* Weather data for Portland United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 18.7 | 23.5 | 24.0 | 29.0 | 29.9 | 33.3 | 34.2 | 32.2 | 33.6 | 28.5 | 23.5 | 18.8 |
| Average daytime temperature (°C) | 9.8 | 13.5 | 13.3 | 20.1 | 23.3 | 27.5 | 29.9 | 28.5 | 26.0 | 20.2 | 13.7 | 10.8 |
| Average temperature (°C) | 4.9 | 6.7 | 6.9 | 13.2 | 16.9 | 21.1 | 24.2 | 23.0 | 20.2 | 14.7 | 7.6 | 5.8 |
| Average night temperature (°C) | 1.5 | 1.8 | 2.1 | 7.3 | 11.4 | 15.6 | 19.7 | 18.4 | 15.5 | 10.5 | 3.2 | 2.4 |
| Absolute minimum temperature (°C) | -5.7 | -8.1 | -7.2 | 0.8 | 3.6 | 10.7 | 16.0 | 13.3 | 10.7 | 3.2 | -6.2 | -4.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.3 | 7.2 | 7.7 | 9.0 | 9.9 | 11.2 | 11.6 | 10.8 | 9.3 | 7.7 | 7.3 | 5.1 |
| Precipitation (mm) | 112 | 78 | 86 | 57 | 84 | 64 | 118 | 70 | 60 | 83 | 46 | 97 |
| Sunny days | 9 | 16 | 15 | 15 | 17 | 14 | 7 | 13 | 14 | 16 | 20 | 16 |
| Rainy days | 20 | 11 | 15 | 15 | 14 | 16 | 24 | 18 | 16 | 15 | 9 | 15 |
| Snow days | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
The best time to visit Portland during the most sunny months:
The largest precipitation sum in Portland is at