Weather on October 20
Allentown, PA
55 Years of Data
Avg High
62°F
Avg Low
41°F
Warmest
2016
66°F avg
Coldest
1974
34°F avg
About This Date
October 20th in Allentown, PA typically brings mild fall weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest October 20th was in 2016 (66°F average), while the coldest was 1974 (34°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 35% of October 20th dates historically, with the wettest October 20th recording 4.19" of rain. The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 44° | 55° | 0.28" | — |
| 2024 | 75° | 32° | 54° | — | — |
| 2023 | 69° | 52° | 60° | 0.48" | — |
| 2022 | 57° | 31° | 44° | — | — |
| 2021 | 75° | 48° | 62° | — | — |
| 2020 | 73° | 54° | 63° | — | — |
| 2019 | 55° | 40° | 47° | 0.89" | — |
| 2018 | 64° | 47° | 55° | 0.25" | — |
| 2017 | 75° | 46° | 61° | — | — |
| 2016warmest | 76° | 56° | 66° | — | — |
| 2015 | 69° | 41° | 55° | — | — |
| 2014 | 61° | 32° | 46° | 0.05" | — |
| 2013 | 61° | 39° | 50° | — | — |
| 2012 | 62° | 41° | 52° | — | — |
| 2011 | 69° | 52° | 60° | 0.03" | — |
| 2010 | 59° | 34° | 46° | — | — |
| 2009 | 66° | 33° | 50° | — | — |
| 2008 | 63° | 27° | 45° | — | — |
| 2007 | 69° | 48° | 59° | — | — |
| 2006 | 64° | 41° | 53° | 0.97" | — |
| 2005 | 58° | 44° | 51° | 0.05" | — |
| 2004 | 51° | 46° | 49° | — | — |
| 2003 | 60° | 35° | 48° | — | — |
| 2002 | 59° | 37° | 48° | — | — |
| 2001 | 70° | 40° | 55° | — | — |
| 2000 | 67° | 33° | 50° | — | — |
| 1999 | 54° | 41° | 47° | 1.02" | — |
| 1998 | 64° | 42° | 53° | — | — |
| 1997 | 66° | 34° | 50° | — | — |
| 1996 | 53° | 43° | 48° | 0.53" | — |
| 1995 | 72° | 47° | 59° | 0.91" | — |
| 1994 | 66° | 55° | 61° | 0.25" | — |
| 1993 | 55° | 51° | 53° | 0.94" | — |
| 1992 | 47° | 26° | 36° | — | — |
| 1991 | 52° | 32° | 42° | — | — |
| 1990 | 62° | 37° | 50° | — | — |
| 1989 | 55° | 36° | 45° | 2.67" | — |
| 1988 | 57° | 34° | 45° | — | — |
| 1987 | 63° | 48° | 55° | 0.25" | — |
| 1986 | 64° | 35° | 50° | — | — |
| 1985 | 61° | 48° | 54° | — | — |
| 1984 | 74° | 55° | 64° | — | — |
| 1983 | 54° | 39° | 46° | — | — |
| 1982 | 73° | 42° | 58° | 0.05" | — |
| 1981 | 60° | 31° | 45° | — | — |
| 1980 | 61° | 44° | 52° | — | — |
| 1979 | 74° | 55° | 64° | — | — |
| 1978 | 58° | 39° | 48° | 0.05" | — |
| 1977 | 60° | 44° | 52° | — | — |
| 1976 | 61° | 45° | 53° | 4.19" | — |
| 1975 | 57° | 47° | 52° | 0.28" | — |
| 1974coldest | 42° | 27° | 34° | — | — |
| 1973 | 66° | 44° | 55° | — | — |
| 1972 | 46° | 24° | 35° | — | — |
| 1971 | 59° | 53° | 56° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP