Weather on June 18
Allentown, PA
55 Years of Data
Avg High
81°F
Avg Low
60°F
Warmest
2017
82°F avg
Coldest
1973
59°F avg
About This Date
June 18th in Allentown, PA typically brings warm summer weather, with average highs around 81°F and lows near 60°F. Over 55 years of records, the warmest June 18th was in 2017 (82°F average), while the coldest was 1973 (59°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 44% of June 18th dates historically, with the wettest June 18th recording 4.72" of rain. The last decade has been 5.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.8°F warmer on this date compared to 20-30 years ago.
Planning for June 18th in Allentown, PA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 69° | 78° | 0.69" | — |
| 2024 | 92° | 68° | 80° | — | — |
| 2023 | 79° | 53° | 66° | — | — |
| 2022 | 69° | 57° | 63° | — | — |
| 2021 | 84° | 49° | 66° | — | — |
| 2020 | 81° | 65° | 73° | 0.13" | — |
| 2019 | 81° | 66° | 73° | 4.72" | — |
| 2018 | 95° | 67° | 81° | 0.15" | — |
| 2017warmest | 90° | 74° | 82° | — | — |
| 2016 | 88° | 53° | 70° | — | — |
| 2015 | 69° | 64° | 67° | 0.41" | — |
| 2014 | 90° | 72° | 81° | — | — |
| 2013 | 82° | 60° | 71° | 0.64" | — |
| 2012 | 71° | 59° | 65° | — | — |
| 2011 | 84° | 58° | 71° | — | — |
| 2010 | 83° | 52° | 67° | — | — |
| 2009 | 69° | 59° | 64° | 3.61" | — |
| 2008 | 73° | 49° | 61° | 0.15" | — |
| 2007 | 89° | 66° | 78° | — | — |
| 2006 | 93° | 61° | 77° | — | — |
| 2005 | 73° | 52° | 62° | — | — |
| 2004 | 86° | 67° | 76° | — | — |
| 2003 | 70° | 59° | 64° | 0.97" | — |
| 2002 | 79° | 46° | 62° | 1.07" | — |
| 2001 | 82° | 61° | 71° | — | — |
| 2000 | 71° | 64° | 68° | 1.68" | — |
| 1999 | 75° | 52° | 63° | 0.05" | — |
| 1998 | 80° | 62° | 71° | 0.03" | — |
| 1997 | 69° | 61° | 65° | 1.65" | — |
| 1996 | 78° | 67° | 72° | 0.05" | — |
| 1995 | 88° | 59° | 73° | — | — |
| 1994 | 90° | 72° | 81° | — | — |
| 1993 | 93° | 63° | 78° | — | — |
| 1992 | 79° | 57° | 68° | — | — |
| 1991 | 70° | 61° | 65° | 0.43" | — |
| 1990 | 85° | 65° | 75° | 0.76" | — |
| 1989 | 81° | 56° | 68° | — | — |
| 1988 | 85° | 57° | 71° | — | — |
| 1987 | 88° | 54° | 71° | — | — |
| 1986 | 73° | 49° | 61° | — | — |
| 1985 | 81° | 65° | 73° | 0.18" | — |
| 1984 | 74° | 64° | 69° | 2.11" | — |
| 1983 | 79° | 67° | 73° | 1.04" | — |
| 1982 | 80° | 64° | 72° | — | — |
| 1981 | 82° | 56° | 69° | — | — |
| 1980 | 77° | 52° | 64° | — | — |
| 1979 | 83° | 61° | 72° | — | — |
| 1978 | 90° | 61° | 75° | 0.2" | — |
| 1977 | 86° | 64° | 75° | 0.1" | — |
| 1976 | 84° | 67° | 75° | — | — |
| 1975 | 88° | 71° | 79° | — | — |
| 1974 | 76° | 53° | 64° | — | — |
| 1973coldest | 63° | 56° | 59° | 0.61" | — |
| 1972 | 72° | 65° | 68° | 3.58" | — |
| 1971 | 81° | 53° | 67° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP