Weather on December 9
Pittsburgh, PA
55 Years of Data
Avg High
43°F
Avg Low
29°F
Warmest
1991
57°F avg
Coldest
1977
21°F avg
About This Date
December 9th in Pittsburgh, PA typically brings chilly winter weather, with average highs around 43°F and lows near 29°F. Over 43 years of records, the warmest December 9th was in 1991 (57°F average), while the coldest was 1977 (21°F) — a 36°F range across recorded history. Precipitation has occurred on 47% of recorded December 9th dates, with snow falling 9% of the time (heaviest snowfall: 1.5"). The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for December 9th in Pittsburgh, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 35° | 12° | 24° | — | — |
| 2024 | 54° | 44° | 49° | 1.35" | — |
| 2023 | 61° | 50° | 55° | 0.08" | — |
| 2022 | 47° | 34° | 40° | — | — |
| 2021 | 42° | 25° | 34° | — | — |
| 2020 | 40° | 29° | 35° | — | — |
| 2019 | 57° | 44° | 51° | 2.49" | — |
| 2018 | 31° | 19° | 25° | — | — |
| 2017 | 35° | 22° | 29° | — | — |
| 2016 | 26° | 21° | 24° | — | — |
| 2015 | 58° | 33° | 45° | 0.03" | — |
| 2014 | 44° | 33° | 39° | — | — |
| 2013 | 39° | 30° | 35° | 0.1" | — |
| 2012 | 56° | 39° | 47° | 0.3" | — |
| 2011 | 43° | 28° | 36° | — | — |
| 2010 | 27° | 17° | 22° | — | — |
| 2009 | 59° | 31° | 45° | 3.05" | — |
| 2008 | 57° | 34° | 45° | 0.03" | — |
| 2007 | 39° | 32° | 36° | 0.79" | — |
| 2006 | 36° | 16° | 26° | 0.03" | — |
| 2005 | 34° | 19° | 26° | — | — |
| 2004 | 48° | 36° | 42° | 0.97" | — |
| 2003 | 43° | 29° | 36° | 0.05" | — |
| 2002 | 29° | 14° | 21° | — | — |
| 2001 | 43° | 36° | 39° | — | — |
| 2000 | 29° | 19° | 24° | — | — |
| 1999 | 55° | 31° | 43° | — | — |
| 1998 | 49° | 36° | 42° | — | — |
| 1997 | 40° | 32° | 36° | — | — |
| 1996 | 40° | 30° | 35° | 0.13" | — |
| 1995 | 35° | 13° | 24° | 0.05" | — |
| 1994 | 51° | 38° | 44° | — | — |
| 1993 | 50° | 31° | 40° | — | — |
| 1992 | 39° | 27° | 33° | — | — |
| 1991warmest | 61° | 54° | 57° | 0.15" | — |
| 1978 | 36° | 22° | 29° | 1.12" | 0.4" |
| 1977coldest | 37° | 5° | 21° | 0.61" | 1.5" |
| 1976 | 31° | 18° | 24° | — | — |
| 1975 | 42° | 34° | 38° | 1.24" | — |
| 1974 | 32° | 21° | 27° | 0.03" | 0.1" |
| 1973 | 37° | 33° | 35° | 1.32" | 1.5" |
| 1972 | 49° | 38° | 43° | — | — |
| 1971 | 54° | 46° | 50° | — | — |
43 years of data from PITTSBURGH WSO CITY