|
Typical Portland September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 70.8 °F | |
| Average daily low | 51.4 °F | |
| Average monthly precipitation | 3.8 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 31.1% | |
| Daily chance of snow | 0% | |
|
Portland September Weather Records 1871–2024 |
||
|---|---|---|
| Highest temperature | 96 °F | September 16, 1939 |
| Lowest temperature | 23 °F | September 30, 1941 |
| Highest daily low | 72 °F | September 2, 1980 |
| Lowest daily high | 45 °F | September 21, 1977 |
| Hottest average high temperature | 76.1 °F | 2015 |
| Coldest average high temperature | 63.1 °F | 1888 |
| Most daily precipitation | 7.5 inches | September 11, 1954 |
| Most monthly precipitation | 10.8 inches | 2008 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 75.5 | 55.6 | 93 | 39 |
| September 2 | 75.2 | 55.3 | 94 | 41 |
| September 3 | 74.9 | 55.0 | 96 | 39 |
| September 4 | 74.7 | 54.8 | 93 | 39 |
| September 5 | 74.4 | 54.5 | 90 | 40 |
| September 6 | 74.1 | 54.1 | 92 | 40 |
| September 7 | 73.9 | 53.8 | 95 | 33 |
| September 8 | 73.6 | 53.6 | 93 | 34 |
| September 9 | 73.4 | 53.4 | 93 | 37 |
| September 10 | 73.0 | 53.0 | 94 | 37 |
| September 11 | 72.5 | 52.6 | 95 | 35 |
| September 12 | 72.1 | 52.3 | 91 | 36 |
| September 13 | 71.9 | 52.1 | 86 | 34 |
| September 14 | 71.5 | 51.9 | 92 | 28 |
| September 15 | 71.1 | 51.6 | 90 | 29 |
| September 16 | 70.7 | 51.2 | 96 | 28 |
| September 17 | 70.3 | 50.9 | 89 | 30 |
| September 18 | 70.0 | 50.5 | 90 | 32 |
| September 19 | 69.6 | 50.1 | 87 | 31 |
| September 20 | 69.2 | 49.8 | 87 | 27 |
| September 21 | 68.9 | 49.5 | 93 | 30 |
| September 22 | 68.4 | 49.0 | 92 | 27 |
| September 23 | 68.0 | 48.5 | 89 | 31 |
| September 24 | 67.6 | 48.0 | 88 | 28 |
| September 25 | 67.3 | 47.7 | 89 | 29 |
| September 26 | 67.0 | 47.4 | 90 | 27 |
| September 27 | 66.7 | 47.2 | 84 | 29 |
| September 28 | 66.2 | 46.8 | 83 | 26 |
| September 29 | 65.8 | 46.3 | 85 | 27 |
| September 30 | 65.4 | 46.0 | 85 | 23 |