|
Typical Allentown September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 76.5 °F | |
| Average daily low | 54.6 °F | |
| Average monthly precipitation | 4.8 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 31.9% | |
| Daily chance of snow | 0% | |
|
Allentown September Weather Records 1894–2024 |
||
|---|---|---|
| Highest temperature | 101 °F | September 1, 1932 |
| Lowest temperature | 31 °F | September 24, 1963 |
| Highest daily low | 79 °F | September 25, 1926 |
| Lowest daily high | 50 °F | September 28, 1984 |
| Hottest average high temperature | 84.5 °F | 1941 |
| Coldest average high temperature | 70.0 °F | 1975 |
| Most daily precipitation | 6.4 inches | September 16, 1999 |
| Most monthly precipitation | 13.0 inches | 2011 |
| Most daily snow | none | - |
| Most monthly snow | none | - |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 80.7 | 59.0 | 101 | 42 |
| September 2 | 80.5 | 58.7 | 99 | 44 |
| September 3 | 80.2 | 58.4 | 99 | 41 |
| September 4 | 80.0 | 58.2 | 95 | 46 |
| September 5 | 79.8 | 57.8 | 94 | 44 |
| September 6 | 79.5 | 57.6 | 96 | 42 |
| September 7 | 79.4 | 57.3 | 92 | 43 |
| September 8 | 79.1 | 57.1 | 98 | 42 |
| September 9 | 78.8 | 56.8 | 98 | 42 |
| September 10 | 78.5 | 56.4 | 98 | 39 |
| September 11 | 78.1 | 56.1 | 97 | 31 |
| September 12 | 77.8 | 55.7 | 95 | 37 |
| September 13 | 77.5 | 55.5 | 94 | 33 |
| September 14 | 77.2 | 55.2 | 92 | 35 |
| September 15 | 76.8 | 54.9 | 93 | 38 |
| September 16 | 76.3 | 54.5 | 95 | 40 |
| September 17 | 76.0 | 54.0 | 93 | 39 |
| September 18 | 75.6 | 53.6 | 92 | 36 |
| September 19 | 75.2 | 53.2 | 93 | 38 |
| September 20 | 74.8 | 52.9 | 95 | 36 |
| September 21 | 74.4 | 52.6 | 96 | 33 |
| September 22 | 74.0 | 52.2 | 96 | 36 |
| September 23 | 73.6 | 51.8 | 96 | 36 |
| September 24 | 73.2 | 51.3 | 92 | 31 |
| September 25 | 73.0 | 51.0 | 92 | 33 |
| September 26 | 72.6 | 50.7 | 90 | 35 |
| September 27 | 72.3 | 50.4 | 91 | 33 |
| September 28 | 71.8 | 50.0 | 87 | 34 |
| September 29 | 71.4 | 49.5 | 87 | 32 |
| September 30 | 71.0 | 49.1 | 87 | 33 |