Weather on September 27
Allentown, PA
55 Years of Data
Avg High
73°F
Avg Low
53°F
Warmest
2017
77°F avg
Coldest
1984
48°F avg
About This Date
September 27th in Allentown, PA typically brings pleasant fall weather, with average highs around 73°F and lows near 53°F. Over 55 years of records, the warmest September 27th was in 2017 (77°F average), while the coldest was 1984 (48°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 45% of September 27th dates historically, with the wettest September 27th recording 14.86" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 57° | 68° | — | — |
| 2024 | 71° | 64° | 68° | 0.08" | — |
| 2023 | 68° | 46° | 57° | — | — |
| 2022 | 66° | 45° | 55° | — | — |
| 2021 | 80° | 51° | 66° | — | — |
| 2020 | 77° | 66° | 72° | 0.61" | — |
| 2019 | 78° | 48° | 63° | — | — |
| 2018 | 71° | 58° | 64° | 0.56" | — |
| 2017warmest | 91° | 63° | 77° | — | — |
| 2016 | 75° | 50° | 63° | 0.86" | — |
| 2015 | 72° | 50° | 61° | — | — |
| 2014 | 84° | 48° | 66° | — | — |
| 2013 | 72° | 51° | 61° | — | — |
| 2012 | 74° | 61° | 67° | 0.79" | — |
| 2011 | 80° | 65° | 72° | — | — |
| 2010 | 73° | 60° | 67° | 0.84" | — |
| 2009 | 70° | 56° | 63° | 0.91" | — |
| 2008 | 71° | 61° | 66° | 1.02" | — |
| 2007 | 86° | 64° | 75° | 0.1" | — |
| 2006 | 71° | 46° | 59° | — | — |
| 2005 | 75° | 50° | 63° | — | — |
| 2004 | 75° | 53° | 64° | — | — |
| 2003 | 79° | 62° | 70° | 1.57" | — |
| 2002 | 77° | 54° | 65° | 0.48" | — |
| 2001 | 62° | 44° | 53° | — | — |
| 2000 | 68° | 38° | 53° | — | — |
| 1999 | 71° | 54° | 62° | — | — |
| 1998 | 88° | 59° | 73° | 0.05" | — |
| 1997 | 67° | 39° | 53° | — | — |
| 1996 | 68° | 57° | 63° | 0.18" | — |
| 1995 | 75° | 51° | 63° | — | — |
| 1994 | 80° | 61° | 70° | 1.12" | — |
| 1993 | 67° | 54° | 60° | 4.42" | — |
| 1992 | 70° | 60° | 65° | 0.25" | — |
| 1991 | 61° | 42° | 51° | — | — |
| 1990 | 76° | 48° | 62° | — | — |
| 1989 | 60° | 40° | 50° | — | — |
| 1988 | 74° | 46° | 60° | — | — |
| 1987 | 75° | 48° | 62° | — | — |
| 1986 | 68° | 58° | 63° | 1.5" | — |
| 1985 | 72° | 56° | 64° | 14.86" | — |
| 1984coldest | 55° | 41° | 48° | 0.38" | — |
| 1983 | 81° | 46° | 63° | — | — |
| 1982 | 73° | 52° | 62° | 1.85" | — |
| 1981 | 83° | 52° | 67° | 0.08" | — |
| 1980 | 66° | 47° | 56° | — | — |
| 1979 | 74° | 50° | 62° | — | — |
| 1978 | 71° | 41° | 56° | — | — |
| 1977 | 72° | 55° | 63° | 0.25" | — |
| 1976 | 72° | 65° | 68° | 1.55" | — |
| 1975 | 72° | 56° | 64° | — | — |
| 1974 | 76° | 44° | 60° | — | — |
| 1973 | 78° | 56° | 67° | — | — |
| 1972 | 80° | 64° | 72° | 0.1" | — |
| 1971 | 62° | 55° | 59° | 0.05" | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP