Weather on May 31
Allentown, PA
55 Years of Data
Avg High
79°F
Avg Low
57°F
Warmest
2011
81°F avg
Coldest
2001
53°F avg
About This Date
May 31st in Allentown, PA typically brings pleasant spring weather, with average highs around 79°F and lows near 57°F. Over 55 years of records, the warmest May 31st was in 2011 (81°F average), while the coldest was 2001 (53°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 31st dates historically, with the wettest May 31st recording 8.2" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for May 31st in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 48° | 58° | 3.18" | — |
| 2024 | 74° | 47° | 60° | — | — |
| 2023 | 82° | 42° | 62° | — | — |
| 2022 | 92° | 64° | 78° | — | — |
| 2021 | 73° | 47° | 60° | — | — |
| 2020 | 69° | 49° | 59° | — | — |
| 2019 | 80° | 62° | 71° | — | — |
| 2018 | 75° | 61° | 68° | 0.13" | — |
| 2017 | 80° | 59° | 70° | — | — |
| 2016 | 88° | 64° | 76° | — | — |
| 2015 | 88° | 61° | 74° | 1.52" | — |
| 2014 | 77° | 50° | 64° | — | — |
| 2013 | 94° | 64° | 79° | — | — |
| 2012 | 78° | 58° | 68° | — | — |
| 2011warmest | 93° | 69° | 81° | — | — |
| 2010 | 89° | 59° | 74° | — | — |
| 2009 | 78° | 47° | 62° | 0.03" | — |
| 2008 | 76° | 63° | 69° | 0.46" | — |
| 2007 | 90° | 58° | 74° | 0.56" | — |
| 2006 | 87° | 65° | 76° | — | — |
| 2005 | 79° | 43° | 61° | — | — |
| 2004 | 62° | 54° | 58° | 1.83" | — |
| 2003 | 67° | 55° | 61° | 1.19" | — |
| 2002 | 86° | 58° | 72° | — | — |
| 2001coldest | 68° | 38° | 53° | — | — |
| 2000 | 72° | 46° | 59° | — | — |
| 1999 | 89° | 53° | 71° | — | — |
| 1998 | 91° | 65° | 78° | 0.41" | — |
| 1997 | 78° | 52° | 65° | — | — |
| 1996 | 75° | 37° | 56° | — | — |
| 1995 | 83° | 51° | 67° | — | — |
| 1994 | 84° | 58° | 71° | — | — |
| 1993 | 68° | 48° | 58° | 1.96" | — |
| 1992 | 69° | 58° | 63° | 2.44" | — |
| 1991 | 89° | 71° | 80° | 0.36" | — |
| 1990 | 74° | 45° | 59° | — | — |
| 1989 | 82° | 65° | 73° | 3.51" | — |
| 1988 | 89° | 63° | 76° | — | — |
| 1987 | 86° | 68° | 77° | — | — |
| 1986 | 90° | 67° | 78° | — | — |
| 1985 | 71° | 62° | 67° | 1.75" | — |
| 1984 | 65° | 49° | 57° | 0.18" | — |
| 1983 | 66° | 51° | 59° | 0.05" | — |
| 1982 | 76° | 63° | 69° | 0.05" | — |
| 1981 | 77° | 57° | 67° | — | — |
| 1980 | 80° | 62° | 71° | 0.91" | — |
| 1979 | 77° | 57° | 67° | — | — |
| 1978 | 86° | 64° | 75° | — | — |
| 1977 | 72° | 52° | 62° | — | — |
| 1976 | 75° | 61° | 68° | — | — |
| 1975 | 81° | 71° | 76° | 0.41" | — |
| 1974 | 68° | 55° | 62° | 0.08" | — |
| 1973 | 71° | 55° | 63° | — | — |
| 1972 | 73° | 63° | 68° | 8.2" | — |
| 1971 | 76° | 54° | 65° | 2.31" | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP