Weather on September 13
Allentown, PA
55 Years of Data
Avg High
78°F
Avg Low
56°F
Warmest
1974
75°F avg
Coldest
1985
53°F avg
About This Date
September 13th in Allentown, PA typically brings pleasant fall weather, with average highs around 78°F and lows near 56°F. Over 55 years of records, the warmest September 13th was in 1974 (75°F average), while the coldest was 1985 (53°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 33% of September 13th dates historically, with the wettest September 13th recording 4.32" of rain. The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.7°F warmer on this date compared to 20-30 years ago.
Planning for September 13th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 56° | 69° | — | — |
| 2024 | 83° | 51° | 67° | — | — |
| 2023 | 79° | 59° | 69° | 0.89" | — |
| 2022 | 79° | 58° | 68° | 0.23" | — |
| 2021 | 84° | 63° | 73° | 0.05" | — |
| 2020 | 79° | 54° | 66° | — | — |
| 2019 | 69° | 62° | 66° | — | — |
| 2018 | 79° | 72° | 75° | — | — |
| 2017 | 74° | 55° | 64° | 0.41" | — |
| 2016 | 86° | 54° | 70° | — | — |
| 2015 | 69° | 50° | 60° | — | — |
| 2014 | 62° | 52° | 57° | 1.14" | — |
| 2013 | 74° | 55° | 64° | — | — |
| 2012 | 81° | 50° | 65° | — | — |
| 2011 | 83° | 58° | 70° | — | — |
| 2010 | 79° | 54° | 66° | — | — |
| 2009 | 78° | 61° | 69° | — | — |
| 2008 | 83° | 63° | 73° | 0.03" | — |
| 2007 | 77° | 47° | 62° | — | — |
| 2006 | 65° | 52° | 58° | 0.13" | — |
| 2005 | 92° | 57° | 74° | — | — |
| 2004 | 85° | 56° | 70° | — | — |
| 2003 | 72° | 62° | 67° | 1.73" | — |
| 2002 | 83° | 43° | 63° | — | — |
| 2001 | 85° | 49° | 67° | 1.63" | — |
| 2000 | 76° | 54° | 65° | 1.55" | — |
| 1999 | 78° | 54° | 66° | — | — |
| 1998 | 82° | 61° | 71° | — | — |
| 1997 | 75° | 54° | 64° | — | — |
| 1996 | 72° | 54° | 63° | 0.28" | — |
| 1995 | 77° | 62° | 70° | 0.46" | — |
| 1994 | 87° | 56° | 71° | — | — |
| 1993 | 82° | 59° | 71° | — | — |
| 1992 | 72° | 44° | 58° | — | — |
| 1991 | 83° | 51° | 67° | — | — |
| 1990 | 83° | 63° | 73° | 0.25" | — |
| 1989 | 82° | 61° | 71° | — | — |
| 1988 | 82° | 60° | 71° | 2.26" | — |
| 1987 | 77° | 67° | 72° | 1.85" | — |
| 1986 | 75° | 52° | 63° | — | — |
| 1985coldest | 64° | 43° | 53° | — | — |
| 1984 | 80° | 52° | 66° | — | — |
| 1983 | 67° | 58° | 62° | — | — |
| 1982 | 83° | 58° | 70° | — | — |
| 1981 | 86° | 54° | 70° | — | — |
| 1980 | 87° | 63° | 75° | — | — |
| 1979 | 78° | 53° | 66° | — | — |
| 1978 | 70° | 56° | 63° | — | — |
| 1977 | 76° | 59° | 67° | — | — |
| 1976 | 89° | 53° | 71° | — | — |
| 1975 | 64° | 45° | 54° | — | — |
| 1974warmest | 84° | 66° | 75° | 3.91" | — |
| 1973 | 75° | 47° | 61° | — | — |
| 1972 | 78° | 61° | 69° | 0.51" | — |
| 1971 | 73° | 61° | 67° | 4.32" | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP