Weather on May 15
Allentown, PA
55 Years of Data
Avg High
73°F
Avg Low
50°F
Warmest
2018
75°F avg
Coldest
1984
48°F avg
About This Date
May 15th in Allentown, PA typically brings pleasant spring weather, with average highs around 73°F and lows near 50°F. Over 55 years of records, the warmest May 15th was in 2018 (75°F average), while the coldest was 1984 (48°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 15th dates historically, with the wettest May 15th recording 3" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for May 15th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 59° | 66° | 0.05" | — |
| 2024 | 67° | 57° | 62° | 0.56" | — |
| 2023 | 73° | 39° | 56° | — | — |
| 2022 | 77° | 63° | 70° | — | — |
| 2021 | 77° | 42° | 60° | — | — |
| 2020 | 85° | 56° | 70° | 0.41" | — |
| 2019 | 72° | 40° | 56° | — | — |
| 2018warmest | 90° | 61° | 75° | 0.56" | — |
| 2017 | 71° | 49° | 60° | — | — |
| 2016 | 55° | 41° | 48° | 0.05" | — |
| 2015 | 76° | 45° | 60° | 0.03" | — |
| 2014 | 84° | 60° | 72° | — | — |
| 2013 | 73° | 46° | 60° | — | — |
| 2012 | 74° | 62° | 68° | 1.85" | — |
| 2011 | 74° | 58° | 66° | 2.13" | — |
| 2010 | 72° | 53° | 62° | — | — |
| 2009 | 79° | 55° | 67° | — | — |
| 2008 | 75° | 53° | 64° | — | — |
| 2007 | 87° | 47° | 67° | — | — |
| 2006 | 64° | 49° | 56° | 1.32" | — |
| 2005 | 77° | 59° | 68° | — | — |
| 2004 | 86° | 60° | 73° | 0.66" | — |
| 2003 | 64° | 38° | 51° | 0.03" | — |
| 2002 | 67° | 44° | 55° | — | — |
| 2001 | 72° | 42° | 57° | — | — |
| 2000 | 63° | 43° | 53° | — | — |
| 1999 | 72° | 38° | 55° | — | — |
| 1998 | 88° | 50° | 69° | — | — |
| 1997 | 69° | 51° | 60° | 0.03" | — |
| 1996 | 65° | 38° | 51° | — | — |
| 1995 | 73° | 51° | 62° | — | — |
| 1994 | 78° | 43° | 60° | 0.51" | — |
| 1993 | 81° | 50° | 65° | — | — |
| 1992 | 66° | 53° | 60° | 0.71" | — |
| 1991 | 86° | 62° | 74° | — | — |
| 1990 | 74° | 49° | 61° | — | — |
| 1989 | 71° | 50° | 61° | — | — |
| 1988 | 74° | 48° | 61° | — | — |
| 1987 | 75° | 49° | 62° | 0.66" | — |
| 1986 | 62° | 53° | 58° | — | — |
| 1985 | 70° | 49° | 59° | — | — |
| 1984coldest | 58° | 39° | 48° | — | — |
| 1983 | 70° | 55° | 62° | 0.64" | — |
| 1982 | 76° | 49° | 62° | — | — |
| 1981 | 79° | 57° | 68° | 3" | — |
| 1980 | 65° | 48° | 56° | — | — |
| 1979 | 77° | 55° | 66° | 0.15" | — |
| 1978 | 57° | 53° | 55° | — | — |
| 1977 | 74° | 40° | 57° | — | — |
| 1976 | 84° | 61° | 72° | — | — |
| 1975 | 77° | 53° | 65° | — | — |
| 1974 | 84° | 60° | 72° | — | — |
| 1973 | 57° | 45° | 51° | 0.58" | — |
| 1972 | 73° | 56° | 64° | 0.38" | — |
| 1971 | 68° | 37° | 53° | 0.05" | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP