Weather on September 29
Allentown, PA
55 Years of Data
Avg High
70°F
Avg Low
50°F
Warmest
2015
74°F avg
Coldest
2000
46°F avg
About This Date
September 29th in Allentown, PA typically brings pleasant fall weather, with average highs around 70°F and lows near 50°F. Over 55 years of records, the warmest September 29th was in 2015 (74°F average), while the coldest was 2000 (46°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 29th dates historically, with the wettest September 29th recording 2.97" of rain. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for September 29th in Allentown, PA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 57° | 66° | — | — |
| 2024 | 64° | 60° | 62° | 0.08" | — |
| 2023 | 66° | 56° | 61° | 0.18" | — |
| 2022 | 66° | 44° | 55° | — | — |
| 2021 | 68° | 47° | 57° | — | — |
| 2020 | 80° | 59° | 70° | 2.97" | — |
| 2019 | 83° | 63° | 73° | — | — |
| 2018 | 74° | 51° | 62° | — | — |
| 2017 | 70° | 44° | 57° | — | — |
| 2016 | 62° | 57° | 60° | 0.99" | — |
| 2015warmest | 81° | 68° | 74° | 2.41" | — |
| 2014 | 78° | 58° | 68° | — | — |
| 2013 | 73° | 46° | 60° | — | — |
| 2012 | 66° | 53° | 60° | — | — |
| 2011 | 75° | 55° | 65° | 0.56" | — |
| 2010 | 74° | 52° | 63° | — | — |
| 2009 | 64° | 45° | 54° | — | — |
| 2008 | 70° | 51° | 60° | — | — |
| 2007 | 75° | 50° | 63° | — | — |
| 2006 | 62° | 43° | 52° | — | — |
| 2005 | 71° | 47° | 59° | 0.25" | — |
| 2004 | 69° | 59° | 64° | — | — |
| 2003 | 65° | 46° | 55° | 0.03" | — |
| 2002 | 72° | 44° | 58° | — | — |
| 2001 | 64° | 44° | 54° | — | — |
| 2000coldest | 60° | 32° | 46° | — | — |
| 1999 | 76° | 65° | 70° | 0.05" | — |
| 1998 | 71° | 43° | 57° | — | — |
| 1997 | 73° | 58° | 65° | 0.33" | — |
| 1996 | 66° | 47° | 56° | 0.08" | — |
| 1995 | 69° | 43° | 56° | — | — |
| 1994 | 66° | 49° | 57° | — | — |
| 1993 | 62° | 44° | 53° | — | — |
| 1992 | 60° | 43° | 51° | — | — |
| 1991 | 70° | 38° | 54° | — | — |
| 1990 | 79° | 50° | 64° | — | — |
| 1989 | 73° | 40° | 56° | — | — |
| 1988 | 61° | 42° | 51° | — | — |
| 1987 | 79° | 50° | 64° | — | — |
| 1986 | 79° | 62° | 70° | — | — |
| 1985 | 74° | 45° | 59° | — | — |
| 1984 | 62° | 45° | 53° | — | — |
| 1983 | 70° | 46° | 58° | — | — |
| 1982 | 70° | 52° | 61° | — | — |
| 1981 | 62° | 39° | 51° | — | — |
| 1980 | 66° | 53° | 60° | — | — |
| 1979 | 76° | 66° | 71° | 0.3" | — |
| 1978 | 65° | 38° | 51° | — | — |
| 1977 | 69° | 49° | 59° | — | — |
| 1976 | 67° | 39° | 53° | — | — |
| 1975 | 74° | 42° | 58° | — | — |
| 1974 | 77° | 55° | 66° | 0.61" | — |
| 1973 | 71° | 56° | 63° | 0.84" | — |
| 1972 | 64° | 57° | 61° | 0.13" | — |
| 1971 | 75° | 60° | 68° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP