Average annual temperature is 20.7 °C
Absolute maximum temperature: 39.4 °C
Absolute minimum temperature: 0.3 °C
Number of sunny days: 142 days
Number of rainy days: 223 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) | 24.0 | 25.1 | 26.5 | 27.5 | 32.1 | 34.8 | 34.1 | 39.4 | 32.7 | 30.5 | 25.6 | 23.3 |
| Average daytime temperature (°C) | 18.8 | 21.0 | 22.1 | 24.6 | 27.6 | 30.1 | 31.8 | 34.3 | 30.2 | 25.9 | 20.3 | 16.9 |
| Average temperature (°C) | 14.2 | 16.5 | 17.7 | 20.0 | 22.7 | 25.8 | 27.7 | 29.2 | 25.3 | 20.6 | 15.4 | 12.5 |
| Average night temperature (°C) | 10.3 | 13.2 | 14.0 | 16.0 | 18.3 | 21.9 | 24.2 | 25.3 | 21.4 | 16.1 | 11.3 | 8.8 |
| Absolute minimum temperature (°C) | 0.9 | 1.9 | 1.3 | 10.0 | 11.1 | 19.3 | 22.3 | 22.1 | 18.2 | 9.6 | 2.7 | 0.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 7.8 | 8.4 | 8.9 | 9.6 | 11.0 | 11.2 | 11.5 | 11.5 | 10.4 | 9.4 | 7.1 | 6.5 |
| Precipitation (mm) | 198 | 154 | 105 | 129 | 89 | 118 | 162 | 105 | 134 | 68 | 140 | 162 |
| Sunny days | 15 | 11 | 10 | 9 | 10 | 6 | 4 | 4 | 9 | 23 | 18 | 23 |
| Rainy days | 16 | 17 | 21 | 21 | 21 | 24 | 27 | 27 | 21 | 8 | 12 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Portland is at