Full Climatology For Portland
Long Term Averages
| JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANNUAL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Max (°C) | 21.4 | 21.3 | 20.4 | 18.3 | 16.2 | 14.3 | 13.8 | 14.6 | 15.9 | 17.3 | 18.7 | 19.9 | 17.7 |
| Mean Min (°C) | 14.8 | 15.1 | 14.1 | 12.4 | 10.8 | 9.0 | 8.5 | 8.7 | 9.5 | 10.5 | 12.0 | 13.2 | 11.5 |
| Mean Rain (mm) | 30.6 | 24.7 | 34.1 | 45.8 | 72.1 | 91.7 | 102.3 | 96.1 | 73.2 | 53.1 | 43.3 | 41.3 | 707.3 |
| Rain Days | 7.0 | 7.0 | 11.0 | 15.0 | 19.0 | 20.0 | 21.0 | 22.0 | 18.0 | 16.0 | 12.0 | 10.0 | 182.0 |
Daily Records
| JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANNUAL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Max (°C) | 42.4 | 39.8 | 40.6 | 35.2 | 28.3 | 21.0 | 20.0 | 25.2 | 29.3 | 35.0 | 37.1 | 45.1 | 45.1 |
| Low Max (°C) | 14.0 | 15.0 | 14.0 | 12.1 | 11.0 | 9.7 | 9.0 | 9.8 | 10.1 | 10.5 | 11.4 | 13.0 | 9.0 |
| High Min (°C) | 28.5 | 24.8 | 24.9 | 22.4 | 17.7 | 14.4 | 13.1 | 14.5 | 17.7 | 20.2 | 22.2 | 23.0 | 28.5 |
| Low Min (°C) | 6.6 | 8.1 | 7.5 | 5.8 | 3.0 | 2.9 | 1.4 | 2.3 | 3.0 | 3.5 | 4.8 | 5.7 | 1.4 |
| High Rain (mm) | 73.8 | 47.0 | 41.4 | 38.4 | 54.2 | 53.0 | 39.2 | 49.0 | 39.0 | 46.2 | 55.6 | 57.0 | 73.8 |
Monthly Records
| JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANNUAL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High Mean Max (°C) | 23.9 | 24.5 | 23.2 | 20.9 | 17.6 | 15.2 | 14.7 | 16.7 | 17.8 | 19.7 | 21.7 | 22.5 | 18.4 |
| Low Mean Max (°C) | 18.4 | 18.7 | 18.6 | 16.1 | 14.7 | 13.0 | 13.0 | 13.1 | 13.9 | 15.1 | 16.5 | 16.8 | 16.5 |
| High Mean Min (°C) | 16.1 | 16.7 | 15.9 | 13.7 | 12.4 | 10.4 | 9.7 | 10.2 | 10.9 | 11.5 | 14.2 | 14.3 | 12.0 |
| Low Mean Min (°C) | 13.2 | 13.7 | 13.0 | 11.0 | 9.6 | 7.9 | 7.2 | 7.8 | 8.7 | 9.5 | 10.8 | 11.7 | 11.0 |
| High Rain (mm) | 145.2 | 64.4 | 62.4 | 96.8 | 173.0 | 157.4 | 196.6 | 243.0 | 134.8 | 112.4 | 87.4 | 107.8 | 997.6 |
| Low Rain (mm) | 0.0 | 0.0 | 7.6 | 9.0 | 19.8 | 44.2 | 37.2 | 37.0 | 24.4 | 6.2 | 10.8 | 9.0 | 487.2 |
Average Number of Days with Temperatures
| JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANNUAL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≥ 40.0°C | 0.3 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.4 |
| ≥ 35.0°C | 1.2 | 0.7 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.7 | 3.6 |
| ≥ 30.0°C | 2.4 | 1.9 | 1.6 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 1.5 | 2.0 | 10.8 |
| ≤ 2.0°C | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| ≤ 0.0°C | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |