Weather on August 18
Allentown, PA
55 Years of Data
Avg High
82°F
Avg Low
62°F
Warmest
2002
84°F avg
Coldest
1979
61°F avg
About This Date
August 18th in Allentown, PA typically brings warm summer weather, with average highs around 82°F and lows near 62°F. Over 55 years of records, the warmest August 18th was in 2002 (84°F average), while the coldest was 1979 (61°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 35% of August 18th dates historically, with the wettest August 18th recording 8.08" of rain. The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.9°F warmer on this date compared to 20-30 years ago.
Planning for August 18th in Allentown, PA? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 62° | 67° | — | — |
| 2024 | 83° | 65° | 74° | 5.97" | — |
| 2023 | 78° | 61° | 69° | 0.84" | — |
| 2022 | 87° | 55° | 71° | — | — |
| 2021 | 88° | 74° | 81° | 8.08" | — |
| 2020 | 83° | 59° | 71° | 2.26" | — |
| 2019 | 93° | 71° | 82° | 1.68" | — |
| 2018 | 86° | 72° | 79° | 0.25" | — |
| 2017 | 86° | 72° | 79° | 7.37" | — |
| 2016 | 87° | 68° | 78° | 0.18" | — |
| 2015 | 92° | 68° | 80° | — | — |
| 2014 | 82° | 51° | 67° | — | — |
| 2013 | 73° | 61° | 67° | 0.03" | — |
| 2012 | 79° | 57° | 68° | 0.03" | — |
| 2011 | 85° | 65° | 75° | 0.38" | — |
| 2010 | 83° | 62° | 72° | — | — |
| 2009 | 89° | 64° | 77° | — | — |
| 2008 | 86° | 58° | 72° | — | — |
| 2007 | 75° | 57° | 66° | — | — |
| 2006 | 85° | 61° | 73° | — | — |
| 2005 | 85° | 59° | 72° | — | — |
| 2004 | 81° | 64° | 72° | — | — |
| 2003 | 81° | 58° | 69° | — | — |
| 2002warmest | 95° | 73° | 84° | — | — |
| 2001 | 82° | 58° | 70° | — | — |
| 2000 | 66° | 56° | 61° | 0.25" | — |
| 1999 | 84° | 65° | 74° | — | — |
| 1998 | 84° | 59° | 72° | 0.61" | — |
| 1997 | 78° | 57° | 68° | 0.91" | — |
| 1996 | 83° | 58° | 70° | — | — |
| 1995 | 93° | 67° | 80° | — | — |
| 1994 | 80° | 70° | 75° | — | — |
| 1993 | 82° | 68° | 75° | — | — |
| 1992 | 80° | 65° | 72° | 0.58" | — |
| 1991 | 88° | 69° | 78° | 0.2" | — |
| 1990 | 86° | 66° | 76° | — | — |
| 1989 | 73° | 58° | 65° | — | — |
| 1988 | 81° | 62° | 71° | — | — |
| 1987 | 88° | 69° | 78° | — | — |
| 1986 | 84° | 68° | 76° | 0.1" | — |
| 1985 | 73° | 59° | 66° | — | — |
| 1984 | 81° | 59° | 70° | — | — |
| 1983 | 89° | 71° | 80° | 0.15" | — |
| 1982 | 78° | 58° | 68° | — | — |
| 1981 | 79° | 47° | 63° | — | — |
| 1980 | 74° | 64° | 69° | — | — |
| 1979coldest | 66° | 56° | 61° | 1.04" | — |
| 1978 | 83° | 62° | 72° | — | — |
| 1977 | 74° | 58° | 66° | — | — |
| 1976 | 79° | 58° | 68° | — | — |
| 1975 | 83° | 64° | 73° | — | — |
| 1974 | 82° | 64° | 73° | — | — |
| 1973 | 77° | 64° | 71° | — | — |
| 1972 | 84° | 63° | 73° | — | — |
| 1971 | 86° | 56° | 71° | — | — |
55 years of data from ALLENTOWN LEHIGH VLY INTL AP