Weather on May 9
Allentown, PA
55 Years of Data
Avg High
68°F
Avg Low
47°F
Warmest
1979
76°F avg
Coldest
1977
41°F avg
About This Date
May 9th in Allentown, PA typically brings mild spring weather, with average highs around 68°F and lows near 47°F. Over 55 years of records, the warmest May 9th was in 1979 (76°F average), while the coldest was 1977 (41°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 9th dates historically, with the wettest May 9th recording 3.86" of rain. The last decade has been 5.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.1°F cooler on this date compared to 20-30 years ago.
Planning for May 9th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 57° | 48° | 53° | 3.86" | — |
| 2024 | 68° | 55° | 62° | 0.38" | — |
| 2023 | 72° | 48° | 60° | — | — |
| 2022 | 71° | 40° | 55° | — | — |
| 2021 | 55° | 38° | 46° | 0.3" | — |
| 2020 | 49° | 34° | 41° | — | — |
| 2019 | 60° | 55° | 58° | — | — |
| 2018 | 80° | 47° | 63° | — | — |
| 2017 | 63° | 36° | 49° | — | — |
| 2016 | 71° | 40° | 55° | — | — |
| 2015 | 75° | 56° | 65° | — | — |
| 2014 | 69° | 56° | 62° | — | — |
| 2013 | 71° | 52° | 61° | 0.03" | — |
| 2012 | 75° | 56° | 65° | 0.2" | — |
| 2011 | 72° | 45° | 58° | — | — |
| 2010 | 52° | 43° | 47° | — | — |
| 2009 | 79° | 61° | 70° | — | — |
| 2008 | 61° | 44° | 52° | 2.9" | — |
| 2007 | 81° | 46° | 63° | — | — |
| 2006 | 73° | 49° | 61° | — | — |
| 2005 | 78° | 43° | 60° | — | — |
| 2004 | 76° | 49° | 62° | — | — |
| 2003 | 63° | 49° | 56° | 0.18" | — |
| 2002 | 54° | 47° | 50° | 1.32" | — |
| 2001 | 78° | 50° | 64° | 0.03" | — |
| 2000 | 89° | 63° | 76° | — | — |
| 1999 | 70° | 48° | 59° | — | — |
| 1998 | 62° | 57° | 60° | 2.29" | — |
| 1997 | 60° | 47° | 53° | 0.61" | — |
| 1996 | 55° | 50° | 53° | 0.46" | — |
| 1995 | 71° | 40° | 55° | 0.08" | — |
| 1994 | 72° | 45° | 58° | — | — |
| 1993 | 85° | 50° | 67° | — | — |
| 1992 | 65° | 52° | 58° | 0.23" | — |
| 1991 | 66° | 47° | 56° | — | — |
| 1990 | 79° | 50° | 64° | — | — |
| 1989 | 65° | 38° | 51° | 0.28" | — |
| 1988 | 71° | 44° | 58° | 0.38" | — |
| 1987 | 76° | 38° | 57° | — | — |
| 1986 | 66° | 45° | 55° | 0.03" | — |
| 1985 | 75° | 36° | 55° | — | — |
| 1984 | 58° | 44° | 51° | — | — |
| 1983 | 55° | 39° | 47° | — | — |
| 1982 | 66° | 54° | 60° | — | — |
| 1981 | 70° | 36° | 53° | — | — |
| 1980 | 59° | 40° | 49° | — | — |
| 1979warmest | 91° | 60° | 76° | — | — |
| 1978 | 77° | 54° | 65° | 0.43" | — |
| 1977coldest | 45° | 38° | 41° | 0.46" | — |
| 1976 | 65° | 34° | 49° | — | — |
| 1975 | 73° | 48° | 61° | — | — |
| 1974 | 65° | 49° | 57° | 0.81" | — |
| 1973 | 72° | 54° | 63° | 0.58" | — |
| 1972 | 51° | 45° | 48° | 2.64" | — |
| 1971 | 54° | 47° | 50° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP