| Wind Rose Data
for Portland Jetport
- based on NWS Observations 1951-1980 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| Percentage of Wind Direction
and
Speed by Month |
|||||||||||||
| DIRECTION | |||||||||||||
| N | 13.3 | 11.9 | 11.4 | 8.7 | 6.2 | 5.1 | 4.7 | 6.4 | 7.6 | 10.0 | 11.3 | 14.4 | 9.2 |
| NNE | 6.7 | 7.2 | 6.5 | 5.0 | 3.6 | 3.0 | 2.0 | 2.8 | 3.9 | 4.8 | 5.7 | 6.0 | 4.8 |
| NE | 3.1 | 3.7 | 4.5 | 3.8 | 3.8 | 3.4 | 2.2 | 2.6 | 3.0 | 3.3 | 3.1 | 3.0 | 3.3 |
| ENE | 1.1 | 2.2 | 3.5 | 3.5 | 4.3 | 3.6 | 2.5 | 2.6 | 2.8 | 2.6 | 2.0 | 0.9 | 2.6 |
| E | 0.9 | 1.9 | 4.2 | 4.8 | 6.5 | 5.8 | 4.4 | 3.8 | 3.4 | 3.6 | 2.2 | 1.0 | 3.5 |
| ESE | 0.8 | 1.6 | 2.7 | 4.0 | 4.9 | 4.3 | 3.5 | 3.1 | 2.6 | 2.5 | 2.0 | 0.9 | 2.8 |
| SE | 1.0 | 1.4 | 2.4 | 3.0 | 3.0 | 3.3 | 2.7 | 2.5 | 2.4 | 2.3 | 1.5 | 0.9 | 2.2 |
| SSE | 1.3 | 2.1 | 2.6 | 4.7 | 5.8 | 5.7 | 6.4 | 5.2 | 4.7 | 3.2 | 2.3 | 1.2 | 3.8 |
| S | 2.4 | 3.8 | 5.1 | 10.1 | 12.2 | 13.8 | 14.5 | 13.2 | 12.2 | 7.8 | 5.8 | 2.9 | 8.7 |
| SSW | 4.1 | 4.3 | 4.0 | 5.3 | 7.3 | 8.6 | 9.3 | 8.8 | 8.4 | 6.5 | 5.1 | 5.3 | 6.4 |
| SW | 8.7 | 6.1 | 4.7 | 5.4 | 5.7 | 6.8 | 7.7 | 7.7 | 7.8 | 8.1 | 8.9 | 10.0 | 7.3 |
| WSW | 9.8 | 8.6 | 7.0 | 6.3 | 6.0 | 6.4 | 7.9 | 6.8 | 7.5 | 8.0 | 9.0 | 10.1 | 7.8 |
| W | 10.4 | 10.1 | 9.9 | 7.7 | 7.1 | 7.0 | 8.1 | 8.0 | 7.8 | 8.4 | 10.8 | 9.8 | 8.7 |
| WNW | 9.8 | 10.1 | 9.5 | 9.1 | 6.7 | 6.4 | 6.8 | 7.0 | 6.2 | 7.0 | 8.5 | 9.4 | 8.0 |
| NW | 11.7 | 11.6 | 10.8 | 8.4 | 7.8 | 6.8 | 6.5 | 7.3 | 7.5 | 8.1 | 8.6 | 9.8 | 8.7 |
| NNW | 10.3 | 8.5 | 7.8 | 6.1 | 5.1 | 4.0 | 3.9 | 4.7 | 5.6 | 7.1 | 7.6 | 8.6 | 6.6 |
| CALM | 4.4 | 4.8 | 4.0 | 4.0 | 4.1 | 6.0 | 6.9 | 7.6 | 6.7 | 6.4 | 5.6 | 5.8 | 5.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | |
| SPEED (MPH) | |||||||||||||
| 1 - 3 | 6.4 | 6.6 | 5.6 | 5.6 | 6.5 | 8.0 | 9.5 | 9.8 | 9.1 | 8.7 | 7.4 | 7.6 | 7.6 |
| 4 - 8 | 28.3 | 27.8 | 23.8 | 24.4 | 27.3 | 32.0 | 33.9 | 35.3 | 33.7 | 30.4 | 29.9 | 29.6 | 29.7 |
| 9 - 12 | 31.3 | 30.6 | 31.7 | 32.9 | 33.6 | 32.8 | 33.4 | 32.0 | 32.1 | 31.9 | 31.7 | 30.9 | 32.1 |
| 13 - 18 | 22.8 | 22.7 | 26.1 | 26.5 | 24.3 | 19.0 | 15.1 | 14.1 | 16.2 | 18.4 | 19.8 | 20.2 | 20.4 |
| 19 - 24 | 5.0 | 5.4 | 6.6 | 5.0 | 3.5 | 1.9 | 1.0 | 1.1 | 1.9 | 3.1 | 4.2 | 4.3 | 3.6 |
| 25 - 31 | 1.4 | 1.8 | 1.8 | 1.4 | 0.7 | 0.2 | 0.1 | 0.1 | 0.3 | 0.8 | 1.1 | 1.3 | 0.9 |
| 32 - 38 | 0.3 | 0.3 | 0.3 | 0.2 | 0.1 | 0.1 | 0.2 | 0.3 | 0.1 | ||||
| 39 - 46 | 0.1 | ||||||||||||
| 47 + | |||||||||||||
created 2/01
by ES