Weather on December 15
Allentown, PA
55 Years of Data
Avg High
42°F
Avg Low
27°F
Warmest
2015
59°F avg
Coldest
2017
18°F avg
About This Date
December 15th in Allentown, PA typically brings chilly winter weather, with average highs around 42°F and lows near 27°F. Over 55 years of records, the warmest December 15th was in 2015 (59°F average), while the coldest was 2017 (18°F) — a 41°F range across recorded history. Precipitation has occurred on 36% of recorded December 15th dates, with snow falling 18% of the time (heaviest snowfall: 2.5"). The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Allentown, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 25° | 14° | 19° | — | — |
| 2024 | 34° | 16° | 25° | 0.2" | 0.3" |
| 2023 | 57° | 25° | 41° | — | — |
| 2022 | 36° | 28° | 32° | 1.83" | 1.3" |
| 2021 | 53° | 23° | 38° | — | — |
| 2020 | 36° | 23° | 30° | — | — |
| 2019 | 48° | 34° | 41° | — | — |
| 2018 | 52° | 44° | 48° | 0.41" | — |
| 2017coldest | 26° | 10° | 18° | 0.18" | 1.1" |
| 2016 | 29° | 16° | 23° | — | — |
| 2015warmest | 66° | 51° | 59° | 0.2" | — |
| 2014 | 47° | 30° | 39° | — | — |
| 2013 | 38° | 25° | 32° | 0.48" | 0.2" |
| 2012 | 47° | 24° | 35° | — | — |
| 2011 | 56° | 43° | 49° | — | — |
| 2010 | 27° | 19° | 23° | 0.05" | 0.8" |
| 2009 | 49° | 37° | 43° | — | — |
| 2008 | 61° | 39° | 50° | 0.2" | — |
| 2007 | 34° | 22° | 28° | 0.03" | — |
| 2006 | 50° | 34° | 42° | 0.05" | — |
| 2005 | 36° | 6° | 21° | 0.61" | 0.6" |
| 2004 | 34° | 18° | 26° | — | — |
| 2003 | 37° | 26° | 32° | — | — |
| 2002 | 42° | 36° | 39° | — | — |
| 2001 | 56° | 29° | 42° | — | — |
| 2000 | 37° | 24° | 31° | — | — |
| 1999 | 46° | 39° | 43° | — | — |
| 1998 | 48° | 19° | 34° | — | — |
| 1997 | 42° | 22° | 32° | — | — |
| 1996 | 45° | 32° | 38° | — | — |
| 1995 | 34° | 28° | 31° | — | — |
| 1994 | 42° | 22° | 32° | — | — |
| 1993 | 50° | 38° | 44° | 0.03" | — |
| 1992 | 39° | 20° | 29° | — | — |
| 1991 | 37° | 28° | 33° | — | — |
| 1990 | 34° | 19° | 26° | 1.22" | — |
| 1989 | 28° | 15° | 22° | 0.36" | 2.5" |
| 1988 | 46° | 22° | 34° | — | — |
| 1987 | 43° | 33° | 38° | 2.03" | — |
| 1986 | 43° | 16° | 29° | — | — |
| 1985 | 35° | 14° | 25° | — | — |
| 1984 | 50° | 35° | 43° | 0.1" | — |
| 1983 | 52° | 40° | 46° | — | — |
| 1982 | 45° | 19° | 32° | — | — |
| 1981 | 36° | 32° | 34° | 1.4" | 2" |
| 1980 | 26° | 16° | 21° | 0.33" | 1.5" |
| 1979 | 38° | 24° | 31° | — | — |
| 1978 | 47° | 22° | 34° | — | — |
| 1977 | 45° | 39° | 42° | — | — |
| 1976 | 43° | 18° | 30° | — | — |
| 1975 | 52° | 39° | 45° | 0.03" | — |
| 1974 | 36° | 29° | 32° | — | — |
| 1973 | 34° | 28° | 31° | — | — |
| 1972 | 35° | 30° | 33° | 2.06" | 0.4" |
| 1971 | 46° | 33° | 40° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP