Weather on December 18
Pittsburgh, PA
55 Years of Data
Avg High
39°F
Avg Low
28°F
Warmest
1977
46°F avg
Coldest
2000
17°F avg
About This Date
December 18th in Pittsburgh, PA typically brings cold winter weather, with average highs around 39°F and lows near 28°F. Over 43 years of records, the warmest December 18th was in 1977 (46°F average), while the coldest was 2000 (17°F) — a 29°F range across recorded history. Precipitation has occurred on 40% of recorded December 18th dates, with snow falling 5% of the time. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Pittsburgh, PA? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 30° | 44° | 0.1" | — |
| 2024 | 41° | 32° | 37° | 0.58" | — |
| 2023 | 46° | 28° | 37° | 0.25" | — |
| 2022 | 31° | 26° | 29° | — | — |
| 2021 | 56° | 37° | 46° | 0.84" | — |
| 2020 | 32° | 29° | 31° | — | — |
| 2019 | 28° | 16° | 22° | 0.03" | — |
| 2018 | 37° | 28° | 33° | — | — |
| 2017 | 42° | 35° | 39° | 0.03" | — |
| 2016 | 60° | 20° | 40° | 3.23" | — |
| 2015 | 35° | 28° | 32° | 0.03" | — |
| 2014 | 29° | 27° | 28° | — | — |
| 2013 | 38° | 32° | 35° | — | — |
| 2012 | 47° | 35° | 41° | 0.25" | — |
| 2011 | 36° | 28° | 32° | 0.2" | — |
| 2010 | 28° | 20° | 24° | — | — |
| 2009 | 38° | 24° | 31° | — | — |
| 2008 | 38° | 30° | 34° | — | — |
| 2007 | 37° | 19° | 28° | — | — |
| 2006 | 60° | 32° | 46° | 0.03" | — |
| 2005 | 34° | 22° | 28° | — | — |
| 2004 | 42° | 22° | 32° | — | — |
| 2003 | 28° | 23° | 26° | — | — |
| 2002 | 45° | 32° | 38° | — | — |
| 2001 | 46° | 34° | 40° | 0.58" | — |
| 2000coldest | 21° | 13° | 17° | — | — |
| 1999 | 36° | 28° | 32° | — | — |
| 1998 | 39° | 28° | 34° | 0.13" | — |
| 1997 | 48° | 27° | 37° | — | — |
| 1996 | 41° | 35° | 38° | — | — |
| 1995 | 41° | 33° | 37° | — | — |
| 1994 | 41° | 35° | 38° | — | — |
| 1993 | 44° | 36° | 40° | 0.18" | — |
| 1992 | 39° | 33° | 36° | — | — |
| 1991 | 29° | 45° | 37° | — | — |
| 1978 | 38° | 29° | 33° | — | — |
| 1977warmest | 52° | 41° | 46° | 0.33" | — |
| 1976 | 41° | 30° | 36° | — | — |
| 1975 | 26° | 12° | 19° | — | — |
| 1974 | 31° | 25° | 28° | 0.05" | 0.2" |
| 1973 | 26° | 16° | 21° | — | — |
| 1972 | 39° | 17° | 28° | — | — |
| 1971 | 27° | 18° | 22° | 0.05" | 0.2" |
43 years of data from PITTSBURGH WSO CITY