Weather on March 20
Allentown, PA
55 Years of Data
Avg High
51°F
Avg Low
31°F
Warmest
2012
65°F avg
Coldest
1981
26°F avg
About This Date
March 20th in Allentown, PA typically brings cool spring weather, with average highs around 51°F and lows near 31°F. Over 56 years of records, the warmest March 20th was in 2012 (65°F average), while the coldest was 1981 (26°F) — a 39°F range across recorded history. Precipitation has occurred on 32% of recorded March 20th dates, with snow falling 7% of the time (heaviest snowfall: 6.1"). The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for March 20th in Allentown, PA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 66° | 30° | 48° | 0.61" | — |
| 2025 | 68° | 45° | 56° | 0.79" | — |
| 2024 | 53° | 30° | 42° | 0.13" | — |
| 2023 | 51° | 21° | 36° | — | — |
| 2022 | 54° | 46° | 50° | — | — |
| 2021 | 59° | 24° | 42° | — | — |
| 2020 | 76° | 49° | 62° | — | — |
| 2019 | 55° | 24° | 40° | — | — |
| 2018 | 38° | 27° | 33° | — | — |
| 2017 | 49° | 28° | 39° | — | — |
| 2016 | 42° | 31° | 37° | — | — |
| 2015 | 34° | 29° | 32° | 1.27" | 6.1" |
| 2014 | 51° | 37° | 44° | — | — |
| 2013 | 47° | 30° | 38° | — | — |
| 2012warmest | 77° | 54° | 65° | — | — |
| 2011 | 52° | 24° | 38° | — | — |
| 2010 | 72° | 36° | 54° | — | — |
| 2009 | 46° | 27° | 36° | — | — |
| 2008 | 60° | 33° | 47° | 0.1" | — |
| 2007 | 46° | 28° | 37° | — | — |
| 2006 | 42° | 25° | 33° | — | — |
| 2005 | 42° | 36° | 39° | 0.43" | — |
| 2004 | 49° | 19° | 34° | 0.08" | — |
| 2003 | 47° | 34° | 40° | 3.33" | — |
| 2002 | 43° | 35° | 39° | 2.21" | — |
| 2001 | 55° | 23° | 39° | — | — |
| 2000 | 48° | 32° | 40° | — | — |
| 1999 | 52° | 29° | 40° | — | — |
| 1998 | 50° | 40° | 45° | 0.23" | — |
| 1997 | 46° | 35° | 41° | — | — |
| 1996 | 46° | 37° | 42° | 0.15" | — |
| 1995 | 60° | 38° | 49° | — | — |
| 1994 | 47° | 31° | 39° | — | — |
| 1993 | 40° | 18° | 29° | — | — |
| 1992 | 40° | 25° | 32° | — | — |
| 1991 | 56° | 40° | 48° | — | — |
| 1990 | 45° | 34° | 39° | 0.3" | — |
| 1989 | 41° | 20° | 30° | 0.64" | 0.5" |
| 1988 | 39° | 24° | 32° | 0.1" | 1.7" |
| 1987 | 51° | 30° | 41° | — | — |
| 1986 | 56° | 17° | 36° | — | — |
| 1985 | 63° | 29° | 46° | 0.03" | — |
| 1984 | 61° | 31° | 46° | — | — |
| 1983 | 55° | 42° | 49° | — | — |
| 1982 | 53° | 32° | 43° | — | — |
| 1981coldest | 35° | 18° | 26° | 0.03" | 0.1" |
| 1980 | 55° | 37° | 46° | — | — |
| 1979 | 61° | 34° | 47° | — | — |
| 1978 | 50° | 33° | 42° | — | — |
| 1977 | 43° | 27° | 35° | 0.3" | — |
| 1976 | 75° | 41° | 58° | — | — |
| 1975 | 51° | 40° | 45° | 0.13" | — |
| 1974 | 49° | 30° | 39° | — | — |
| 1973 | 48° | 29° | 38° | — | — |
| 1972 | 49° | 23° | 36° | — | — |
| 1971 | 37° | 31° | 34° | — | — |
56 years of data from ALLENTOWN LEHIGH VLY INTL AP