Weather on December 20
Pittsburgh, PA
55 Years of Data
Avg High
40°F
Avg Low
26°F
Warmest
2013
51°F avg
Coldest
2004
8°F avg
About This Date
December 20th in Pittsburgh, PA typically brings chilly winter weather, with average highs around 40°F and lows near 26°F. Over 43 years of records, the warmest December 20th was in 2013 (51°F average), while the coldest was 2004 (8°F) — a 43°F range across recorded history. Precipitation has occurred on 49% of recorded December 20th dates, with snow falling 9% of the time (heaviest snowfall: 1.7"). The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Pittsburgh, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 14° | 31° | — | — |
| 2024 | 34° | 31° | 33° | 0.18" | — |
| 2023 | 39° | 22° | 31° | — | — |
| 2022 | 36° | 26° | 31° | — | — |
| 2021 | 40° | 28° | 34° | — | — |
| 2020 | 36° | 32° | 34° | 0.56" | — |
| 2019 | 36° | 20° | 28° | — | — |
| 2018 | 52° | 30° | 41° | 2.54" | — |
| 2017 | 42° | 27° | 35° | — | — |
| 2016 | 36° | 14° | 25° | — | — |
| 2015 | 41° | 23° | 32° | — | — |
| 2014 | 33° | 25° | 29° | — | — |
| 2013warmest | 57° | 45° | 51° | 0.05" | — |
| 2012 | 46° | 35° | 41° | 2.03" | — |
| 2011 | 45° | 38° | 41° | 0.74" | — |
| 2010 | 27° | 21° | 24° | — | — |
| 2009 | 29° | 20° | 25° | 0.2" | — |
| 2008 | 33° | 24° | 29° | — | — |
| 2007 | 38° | 29° | 34° | — | — |
| 2006 | 48° | 23° | 36° | — | — |
| 2005 | 23° | 8° | 16° | — | — |
| 2004coldest | 14° | 1° | 8° | — | — |
| 2003 | 27° | 18° | 22° | — | — |
| 2002 | 54° | 37° | 45° | 0.2" | — |
| 2001 | 38° | 30° | 34° | 0.03" | — |
| 2000 | 21° | 10° | 16° | — | 0.2" |
| 1999 | 49° | 31° | 40° | 0.66" | — |
| 1998 | 47° | 43° | 45° | 0.3" | — |
| 1997 | 46° | 37° | 42° | — | — |
| 1996 | 20° | 12° | 16° | 0.25" | — |
| 1995 | 30° | 20° | 25° | — | 1.7" |
| 1994 | 47° | 37° | 42° | — | — |
| 1993 | 39° | 35° | 37° | 0.15" | — |
| 1992 | 50° | 28° | 39° | 0.43" | — |
| 1991 | 29° | 10° | 19° | — | — |
| 1978 | 59° | 29° | 44° | 1.65" | — |
| 1977 | 45° | 37° | 41° | 0.71" | — |
| 1976 | 54° | 21° | 37° | 0.36" | — |
| 1975 | 35° | 23° | 29° | 0.03" | 0.1" |
| 1974 | 38° | 24° | 31° | — | — |
| 1973 | 48° | 32° | 40° | 0.79" | 0.1" |
| 1972 | 47° | 40° | 43° | 0.61" | — |
| 1971 | 48° | 37° | 43° | 0.08" | — |
43 years of data from PITTSBURGH WSO CITY