|
Typical Portland September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 76.2 °F | |
| Average daily low | 54.1 °F | |
| Average monthly precipitation | 1.5 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 21.9% | |
| Daily chance of snow | 0% | |
|
Portland September Weather Records 1871–2024 |
||
|---|---|---|
| Highest temperature | 105 °F | September 2, 1988 |
| Lowest temperature | 34 °F | September 17, 1965 |
| Highest daily low | 67 °F | September 14, 1912 |
| Lowest daily high | 50 °F | September 23, 1934 |
| Hottest average high temperature | 81.9 °F | 1974 |
| Coldest average high temperature | 65.2 °F | 1893 |
| Most daily precipitation | 2.2 inches | September 17, 1969 |
| Most monthly precipitation | 5.6 inches | 2013 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 79.4 | 56.8 | 98 | 44 |
| September 2 | 79.2 | 56.6 | 105 | 42 |
| September 3 | 78.8 | 56.4 | 95 | 42 |
| September 4 | 78.5 | 56.3 | 98 | 43 |
| September 5 | 78.3 | 56.1 | 101 | 44 |
| September 6 | 78.1 | 55.9 | 97 | 45 |
| September 7 | 77.9 | 55.8 | 99 | 42 |
| September 8 | 77.7 | 55.6 | 93 | 42 |
| September 9 | 77.5 | 55.4 | 94 | 41 |
| September 10 | 77.3 | 55.2 | 98 | 41 |
| September 11 | 77.0 | 55.0 | 95 | 38 |
| September 12 | 76.7 | 54.8 | 92 | 38 |
| September 13 | 76.6 | 54.6 | 93 | 37 |
| September 14 | 76.5 | 54.4 | 97 | 41 |
| September 15 | 76.3 | 54.2 | 96 | 40 |
| September 16 | 76.0 | 54.0 | 92 | 41 |
| September 17 | 75.7 | 53.8 | 95 | 34 |
| September 18 | 75.2 | 53.6 | 93 | 36 |
| September 19 | 74.8 | 53.4 | 93 | 39 |
| September 20 | 74.5 | 53.2 | 96 | 39 |
| September 21 | 74.2 | 52.9 | 94 | 36 |
| September 22 | 73.8 | 52.7 | 93 | 34 |
| September 23 | 73.5 | 52.4 | 94 | 37 |
| September 24 | 73.0 | 52.2 | 96 | 35 |
| September 25 | 72.6 | 51.9 | 94 | 35 |
| September 26 | 72.1 | 51.6 | 92 | 38 |
| September 27 | 71.6 | 51.3 | 95 | 37 |
| September 28 | 71.2 | 51.1 | 89 | 37 |
| September 29 | 70.8 | 50.8 | 89 | 37 |
| September 30 | 70.5 | 50.5 | 88 | 35 |