Weather on September 5
Allentown, PA
55 Years of Data
Avg High
79°F
Avg Low
58°F
Warmest
2018
82°F avg
Coldest
2000
57°F avg
About This Date
September 5th in Allentown, PA typically brings pleasant fall weather, with average highs around 79°F and lows near 58°F. Over 55 years of records, the warmest September 5th was in 2018 (82°F average), while the coldest was 2000 (57°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 5th dates historically, with the wettest September 5th recording 5.92" of rain. The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
Planning for September 5th in Allentown, PA? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 62° | 72° | 0.3" | — |
| 2024 | 79° | 47° | 63° | — | — |
| 2023 | 91° | 69° | 80° | — | — |
| 2022 | 85° | 68° | 76° | 0.99" | — |
| 2021 | 71° | 57° | 64° | 0.08" | — |
| 2020 | 78° | 53° | 66° | — | — |
| 2019 | 76° | 59° | 67° | — | — |
| 2018warmest | 94° | 70° | 82° | — | — |
| 2017 | 86° | 60° | 73° | 4.27" | — |
| 2016 | 88° | 53° | 70° | — | — |
| 2015 | 86° | 67° | 76° | — | — |
| 2014 | 85° | 66° | 75° | — | — |
| 2013 | 76° | 55° | 65° | — | — |
| 2012 | 82° | 62° | 72° | 0.28" | — |
| 2011 | 75° | 62° | 69° | 5.92" | — |
| 2010 | 75° | 48° | 62° | — | — |
| 2009 | 82° | 55° | 69° | — | — |
| 2008 | 90° | 64° | 77° | 0.03" | — |
| 2007 | 83° | 57° | 70° | — | — |
| 2006 | 69° | 58° | 63° | 0.51" | — |
| 2005 | 81° | 54° | 67° | — | — |
| 2004 | 70° | 56° | 63° | — | — |
| 2003 | 75° | 57° | 66° | — | — |
| 2002 | 80° | 58° | 69° | — | — |
| 2001 | 75° | 52° | 63° | — | — |
| 2000coldest | 68° | 47° | 57° | — | — |
| 1999 | 77° | 69° | 73° | 0.38" | — |
| 1998 | 78° | 54° | 66° | — | — |
| 1997 | 73° | 44° | 59° | — | — |
| 1996 | 86° | 66° | 76° | — | — |
| 1995 | 88° | 58° | 73° | — | — |
| 1994 | 72° | 48° | 60° | — | — |
| 1993 | 81° | 62° | 71° | — | — |
| 1992 | 73° | 63° | 68° | — | — |
| 1991 | 83° | 61° | 72° | — | — |
| 1990 | 77° | 59° | 68° | — | — |
| 1989 | 73° | 50° | 62° | — | — |
| 1988 | 74° | 52° | 63° | — | — |
| 1987 | 73° | 51° | 62° | — | — |
| 1986 | 72° | 65° | 68° | 3.53" | — |
| 1985 | 90° | 71° | 80° | — | — |
| 1984 | 70° | 50° | 60° | — | — |
| 1983 | 92° | 61° | 76° | — | — |
| 1982 | 75° | 48° | 62° | — | — |
| 1981 | 74° | 61° | 67° | 0.05" | — |
| 1980 | 84° | 69° | 77° | 0.64" | — |
| 1979 | 80° | 70° | 75° | 2.24" | — |
| 1978 | 83° | 54° | 68° | — | — |
| 1977 | 83° | 68° | 75° | — | — |
| 1976 | 81° | 54° | 67° | — | — |
| 1975 | 75° | 52° | 63° | — | — |
| 1974 | 69° | 47° | 58° | — | — |
| 1973 | 89° | 68° | 79° | — | — |
| 1972 | 73° | 48° | 61° | — | — |
| 1971 | 88° | 63° | 75° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP