Weather on August 21
Pittsburgh, PA
55 Years of Data
Avg High
82°F
Avg Low
62°F
Warmest
2010
78°F avg
Coldest
2024
62°F avg
About This Date
August 21st in Pittsburgh, PA typically brings warm summer weather, with average highs around 82°F and lows near 62°F. Over 37 years of records, the warmest August 21st was in 2010 (78°F average), while the coldest was 2024 (62°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 46% of August 21st dates historically, with the wettest August 21st recording 2.03" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for August 21st in Pittsburgh, PA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 68° | 74° | — | — |
| 2024coldest | 73° | 52° | 62° | — | — |
| 2023 | 89° | 66° | 78° | — | — |
| 2022 | 81° | 63° | 72° | 1.68" | — |
| 2021 | 85° | 64° | 74° | — | — |
| 2020 | 88° | 62° | 75° | — | — |
| 2019 | 83° | 68° | 75° | 0.15" | — |
| 2018 | 79° | 69° | 74° | 1.07" | — |
| 2017 | 85° | 65° | 75° | 0.2" | — |
| 2016 | 77° | 65° | 71° | 0.2" | — |
| 2015 | 78° | 59° | 69° | — | — |
| 2014 | 78° | 64° | 71° | — | — |
| 2013 | 83° | 61° | 72° | — | — |
| 2012 | 78° | 55° | 67° | 0.23" | — |
| 2011 | 83° | 63° | 73° | 0.76" | — |
| 2010warmest | 90° | 67° | 78° | 1.96" | — |
| 2009 | 82° | 66° | 74° | 0.18" | — |
| 2008 | 88° | 59° | 73° | — | — |
| 2007 | 78° | 67° | 72° | 2.03" | — |
| 2006 | 79° | 58° | 68° | 0.03" | — |
| 2005 | 84° | 70° | 77° | — | — |
| 2004 | 72° | 56° | 64° | 0.71" | — |
| 2003 | 88° | 66° | 77° | — | — |
| 2002 | 87° | 59° | 73° | — | — |
| 2001 | 79° | 60° | 69° | — | — |
| 2000 | 77° | 50° | 64° | — | — |
| 1993 | 85° | 67° | 76° | — | — |
| 1992 | 84° | 54° | 69° | — | — |
| 1979 | 72° | 64° | 68° | 0.61" | — |
| 1978 | 80° | 56° | 68° | — | — |
| 1977 | 80° | 57° | 69° | 0.05" | — |
| 1976 | 90° | 55° | 72° | — | — |
| 1975 | 86° | 62° | 74° | 0.56" | — |
| 1974 | 83° | 65° | 74° | — | — |
| 1973 | 67° | 62° | 64° | 0.2" | — |
| 1972 | 85° | 59° | 72° | — | — |
| 1971 | 86° | 67° | 76° | 0.2" | — |
37 years of data from PITTSBURGH WSO CITY