Weather on May 21
Pittsburgh, PA
55 Years of Data
Avg High
73°F
Avg Low
53°F
Warmest
1975
78°F avg
Coldest
2002
43°F avg
About This Date
May 21st in Pittsburgh, PA typically brings pleasant spring weather, with average highs around 73°F and lows near 53°F. Over 43 years of records, the warmest May 21st was in 1975 (78°F average), while the coldest was 2002 (43°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 28% of May 21st dates historically, with the wettest May 21st recording 4.57" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Pittsburgh, PA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 55° | 63° | 4.57" | — |
| 2024 | 86° | 63° | 74° | — | — |
| 2023 | 74° | 47° | 60° | — | — |
| 2022 | 88° | 67° | 77° | — | — |
| 2021 | 86° | 61° | 73° | — | — |
| 2020 | 72° | 50° | 61° | — | — |
| 2019 | 60° | 46° | 53° | — | — |
| 2018 | 80° | 57° | 69° | — | — |
| 2017 | 76° | 58° | 67° | 3.2" | — |
| 2016 | 57° | 51° | 54° | 3.12" | — |
| 2015 | 54° | 45° | 49° | 0.33" | — |
| 2014 | 75° | 60° | 68° | — | — |
| 2013 | 86° | 67° | 76° | 0.2" | — |
| 2012 | 80° | 59° | 70° | — | — |
| 2011 | 79° | 55° | 67° | 0.03" | — |
| 2010 | 77° | 55° | 66° | — | — |
| 2009 | 83° | 54° | 68° | — | — |
| 2008 | 58° | 45° | 51° | 0.05" | — |
| 2007 | 69° | 48° | 59° | — | — |
| 2006 | 61° | 44° | 52° | 0.1" | — |
| 2005 | 69° | 42° | 56° | 0.05" | — |
| 2004 | 77° | 60° | 69° | 3.4" | — |
| 2003 | 59° | 45° | 52° | — | — |
| 2002coldest | 53° | 33° | 43° | — | — |
| 2001 | 72° | 57° | 64° | 3.68" | — |
| 2000 | 66° | 52° | 59° | — | — |
| 1999 | 77° | 48° | 63° | — | — |
| 1998 | 76° | 62° | 69° | — | — |
| 1997 | 60° | 49° | 54° | — | — |
| 1996 | 80° | 73° | 77° | — | — |
| 1995 | 79° | 56° | 67° | — | — |
| 1994 | 76° | 44° | 60° | — | — |
| 1993 | 63° | 39° | 51° | — | — |
| 1992 | 78° | 43° | 60° | — | — |
| 1979 | 75° | 51° | 63° | 0.28" | — |
| 1978 | 66° | 54° | 60° | — | — |
| 1977 | 89° | 63° | 76° | — | — |
| 1976 | 73° | 51° | 62° | — | — |
| 1975warmest | 88° | 68° | 78° | — | — |
| 1974 | 86° | 56° | 71° | — | — |
| 1973 | 69° | 45° | 57° | — | — |
| 1972 | 83° | 61° | 72° | — | — |
| 1971 | 70° | 51° | 60° | — | — |
43 years of data from PITTSBURGH WSO CITY