Weather on December 9
Allentown, PA
55 Years of Data
Avg High
41°F
Avg Low
25°F
Warmest
1980
53°F avg
Coldest
2002
16°F avg
About This Date
December 9th in Allentown, PA typically brings chilly winter weather, with average highs around 41°F and lows near 25°F. Over 55 years of records, the warmest December 9th was in 1980 (53°F average), while the coldest was 2002 (16°F) — a 37°F range across recorded history. Precipitation has occurred on 44% of recorded December 9th dates, with snow falling 16% of the time (heaviest snowfall: 9.1"). The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Allentown, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 31° | 8° | 19° | — | — |
| 2024 | 44° | 27° | 36° | 0.79" | — |
| 2023 | 53° | 33° | 43° | — | — |
| 2022 | 47° | 25° | 36° | — | — |
| 2021 | 37° | 23° | 30° | — | — |
| 2020 | 37° | 29° | 33° | 0.15" | 0.7" |
| 2019 | 52° | 35° | 43° | 1.93" | — |
| 2018 | 33° | 20° | 27° | — | — |
| 2017 | 33° | 24° | 29° | 0.79" | 4.9" |
| 2016 | 38° | 19° | 29° | — | — |
| 2015 | 53° | 26° | 40° | — | — |
| 2014 | 44° | 30° | 37° | 2.69" | — |
| 2013 | 34° | 28° | 31° | 0.58" | — |
| 2012 | 46° | 38° | 42° | 0.89" | — |
| 2011 | 48° | 27° | 37° | — | — |
| 2010 | 31° | 13° | 22° | — | — |
| 2009 | 40° | 32° | 36° | 3.33" | 2.3" |
| 2008 | 41° | 26° | 34° | — | — |
| 2007 | 36° | 26° | 31° | 1.09" | — |
| 2006 | 38° | 20° | 29° | — | — |
| 2005 | 34° | 23° | 28° | 1.65" | 9.1" |
| 2004 | 46° | 29° | 37° | 1.52" | — |
| 2003 | 33° | 21° | 27° | — | — |
| 2002coldest | 25° | 7° | 16° | — | — |
| 2001 | 45° | 26° | 35° | 0.64" | — |
| 2000 | 35° | 20° | 27° | — | — |
| 1999 | 54° | 27° | 40° | — | — |
| 1998 | 48° | 29° | 38° | — | — |
| 1997 | 39° | 19° | 29° | — | — |
| 1996 | 39° | 28° | 34° | 0.03" | 0.1" |
| 1995 | 32° | 25° | 28° | 0.76" | 4" |
| 1994 | 38° | 22° | 30° | — | — |
| 1993 | 46° | 24° | 35° | — | — |
| 1992 | 36° | 17° | 26° | — | — |
| 1991 | 56° | 41° | 48° | 0.94" | — |
| 1990 | 48° | 33° | 41° | — | — |
| 1989 | 27° | 7° | 17° | — | — |
| 1988 | 36° | 22° | 29° | — | — |
| 1987 | 50° | 27° | 38° | 0.05" | — |
| 1986 | 37° | 31° | 34° | 1.42" | 0.3" |
| 1985 | 48° | 28° | 38° | — | — |
| 1984 | 45° | 22° | 33° | — | — |
| 1983 | 40° | 24° | 32° | 0.03" | — |
| 1982 | 39° | 14° | 27° | — | — |
| 1981 | 35° | 28° | 32° | — | — |
| 1980warmest | 66° | 39° | 53° | 0.38" | — |
| 1979 | 36° | 27° | 31° | — | — |
| 1978 | 54° | 30° | 42° | 3.07" | 0.5" |
| 1977 | 38° | 14° | 26° | 0.38" | 2.8" |
| 1976 | 32° | 15° | 24° | — | — |
| 1975 | 44° | 31° | 37° | 0.36" | — |
| 1974 | 42° | 28° | 35° | — | — |
| 1973 | 45° | 35° | 40° | 3.84" | — |
| 1972 | 44° | 34° | 39° | 0.2" | — |
| 1971 | 45° | 37° | 41° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP