Weather on December 31
Allentown, PA
55 Years of Data
Avg High
39°F
Avg Low
24°F
Warmest
1992
51°F avg
Coldest
2017
12°F avg
About This Date
December 31st in Allentown, PA typically brings cold winter weather, with average highs around 39°F and lows near 24°F. Over 55 years of records, the warmest December 31st was in 1992 (51°F average), while the coldest was 2017 (12°F) — a 39°F range across recorded history. Precipitation has occurred on 44% of recorded December 31st dates, with snow falling 9% of the time (heaviest snowfall: 3"). The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
Planning for December 31st in Allentown, PA? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 32° | 24° | 28° | — | — |
| 2024 | 54° | 25° | 40° | 1.57" | — |
| 2023 | 41° | 34° | 37° | — | — |
| 2022 | 47° | 31° | 39° | 0.89" | — |
| 2021 | 49° | 46° | 47° | — | — |
| 2020 | 41° | 27° | 34° | 0.48" | — |
| 2019 | 46° | 36° | 41° | 0.03" | — |
| 2018 | 43° | 25° | 34° | 2.64" | — |
| 2017coldest | 18° | 6° | 12° | — | — |
| 2016 | 44° | 23° | 34° | — | — |
| 2015 | 49° | 39° | 44° | — | — |
| 2014 | 32° | 16° | 24° | — | — |
| 2013 | 32° | 17° | 25° | 0.03" | 0.2" |
| 2012 | 37° | 25° | 31° | — | — |
| 2011 | 54° | 34° | 44° | — | — |
| 2010 | 46° | 23° | 35° | — | — |
| 2009 | 32° | 26° | 29° | 1.02" | 3" |
| 2008 | 32° | 19° | 26° | 0.05" | — |
| 2007 | 41° | 25° | 33° | 0.43" | 0.7" |
| 2006 | 44° | 23° | 34° | 0.05" | — |
| 2005 | 35° | 27° | 31° | 0.41" | 2" |
| 2004 | 54° | 39° | 46° | — | — |
| 2003 | 46° | 26° | 36° | — | — |
| 2002 | 42° | 34° | 38° | 0.03" | — |
| 2001 | 30° | 12° | 21° | — | — |
| 2000 | 30° | 20° | 25° | — | — |
| 1999 | 41° | 22° | 31° | 0.03" | — |
| 1998 | 27° | 14° | 20° | — | — |
| 1997 | 28° | 14° | 21° | — | — |
| 1996 | 33° | 19° | 26° | 0.08" | — |
| 1995 | 41° | 17° | 29° | — | — |
| 1994 | 36° | 14° | 25° | 0.71" | — |
| 1993 | 30° | 10° | 20° | — | — |
| 1992warmest | 59° | 42° | 51° | — | — |
| 1991 | 37° | 18° | 27° | — | — |
| 1990 | 48° | 24° | 36° | 0.25" | — |
| 1989 | 36° | 25° | 30° | 2.18" | — |
| 1988 | 42° | 24° | 33° | — | — |
| 1987 | 30° | 5° | 18° | — | — |
| 1986 | 41° | 22° | 31° | — | — |
| 1985 | 40° | 15° | 27° | — | — |
| 1984 | 37° | 23° | 30° | 0.08" | — |
| 1983 | 29° | 8° | 18° | — | — |
| 1982 | 35° | 26° | 31° | — | — |
| 1981 | 36° | 16° | 26° | 0.25" | — |
| 1980 | 27° | 13° | 20° | — | — |
| 1979 | 47° | 28° | 37° | — | — |
| 1978 | 45° | 32° | 38° | 0.79" | — |
| 1977 | 43° | 26° | 34° | — | — |
| 1976 | 20° | 14° | 17° | — | — |
| 1975 | 44° | 34° | 39° | 0.51" | — |
| 1974 | 35° | 24° | 30° | 1.12" | 2.8" |
| 1973 | 35° | 31° | 33° | 0.25" | — |
| 1972 | 61° | 35° | 48° | 1.52" | — |
| 1971 | 46° | 23° | 35° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP