Weather on April 21
Pittsburgh, PA
55 Years of Data
Avg High
66°F
Avg Low
46°F
Warmest
1977
74°F avg
Coldest
2021
36°F avg
About This Date
April 21st in Pittsburgh, PA typically brings mild spring weather, with average highs around 66°F and lows near 46°F. Over 43 years of records, the warmest April 21st was in 1977 (74°F average), while the coldest was 2021 (36°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 49% of April 21st dates historically, with the wettest April 21st recording 1.63" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Pittsburgh, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 59° | 69° | 0.51" | — |
| 2024 | 50° | 38° | 44° | — | — |
| 2023 | 82° | 57° | 70° | 0.03" | — |
| 2022 | 59° | 48° | 54° | 0.53" | — |
| 2021coldest | 40° | 32° | 36° | 0.23" | — |
| 2020 | 52° | 35° | 43° | 0.25" | — |
| 2019 | 53° | 45° | 49° | — | — |
| 2018 | 57° | 34° | 45° | — | — |
| 2017 | 70° | 50° | 60° | 0.25" | — |
| 2016 | 74° | 56° | 65° | — | — |
| 2015 | 58° | 45° | 51° | — | — |
| 2014 | 80° | 46° | 63° | — | — |
| 2013 | 53° | 31° | 42° | — | — |
| 2012 | 65° | 40° | 52° | 0.58" | — |
| 2011 | 55° | 41° | 48° | — | — |
| 2010 | 67° | 44° | 55° | — | — |
| 2009 | 54° | 41° | 47° | 0.23" | — |
| 2008 | 67° | 52° | 59° | — | — |
| 2007 | 73° | 46° | 60° | — | — |
| 2006 | 74° | 56° | 65° | 1.3" | — |
| 2005 | 58° | 47° | 52° | 0.03" | — |
| 2004 | 79° | 56° | 67° | — | — |
| 2003 | 72° | 54° | 63° | 0.74" | — |
| 2002 | 51° | 42° | 47° | 0.58" | — |
| 2001 | 71° | 53° | 62° | 0.18" | — |
| 2000 | 59° | 43° | 51° | 0.46" | — |
| 1999 | 57° | 40° | 48° | 0.46" | — |
| 1998 | 71° | 42° | 57° | — | — |
| 1997 | 60° | 40° | 50° | — | — |
| 1996 | 70° | 54° | 62° | — | — |
| 1995 | 76° | 54° | 65° | — | — |
| 1994 | 74° | 50° | 62° | — | — |
| 1993 | 61° | 40° | 50° | 0.3" | — |
| 1992 | 80° | 62° | 71° | 1.14" | — |
| 1979 | 79° | 43° | 61° | — | — |
| 1978 | 42° | 36° | 39° | 0.03" | — |
| 1977warmest | 85° | 63° | 74° | — | — |
| 1976 | 85° | 60° | 72° | 1.63" | — |
| 1975 | 52° | 36° | 44° | — | — |
| 1974 | 80° | 44° | 62° | — | — |
| 1973 | 82° | 64° | 73° | — | — |
| 1972 | 60° | 36° | 48° | 0.18" | — |
| 1971 | 58° | 39° | 48° | 0.03" | — |
43 years of data from PITTSBURGH WSO CITY