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Allentown, PA Weather on May 27
May 27th in Allentown, PA typically brings pleasant spring weather, with average highs around 76°F and lows near 54°F. Over 55 years of records, the warmest May 27th was in 1991 (79°F average), while the coldest was 1973 (50°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 36% of May 27th dates historically, with the wettest May 27th recording 1.6" of rain. The last decade has been 6.7°F warmer on this date compared to 20-30 years ago.
What to Expect on May 27
Planning for May 27th in Allentown, PA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
May 27 Weather Records for Allentown
- •The all-time record high for May 27th in Allentown, PA is 91°F, set in 1991.
- •The coldest May 27th on record dropped to 38°F in 1972.
- •Temperatures have reached 90°F or higher on May 27th in 2 of the last 55 years.
- •Last year (1971), May 27th was 11°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest May 27 ever in Allentown?
The warmest May 27 in Allentown, PA reached 91°F in 1991. That is 15°F above the long-term average high of 76°F.
What was the coldest May 27 ever in Allentown?
The coldest May 27 in Allentown, PA dropped to 38°F in 1972. That is 16°F below the long-term average low of 54°F.
What is the average temperature on May 27 in Allentown?
On May 27, Allentown averages a high of 76°F and a low of 54°F based on 55 years of NOAA weather observations from ALLENTOWN LEHIGH VLY INTL AP.
How many years of weather data are available for May 27 in Allentown?
We have 55 years of weather records for May 27 in Allentown, PA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
May 27 Weather History in Allentown
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 72°F | 48°F | 0" | -- |
| 2024 | 77°F | 64°F | 1.6" | -- |
| 2023 | 81°F | 43°F | 0" | -- |
| 2022 | 74°F | 64°F | 0.58" | -- |
| 2021 | 82°F | 59°F | 0" | -- |
| 2020 | 81°F | 59°F | 0" | -- |
| 2019 | 83°F | 61°F | 0" | -- |
| 2018 | 76°F | 59°F | 0" | -- |
| 2017 | 75°F | 52°F | 0" | -- |
| 2016 | 90°F | 66°F | 0.43" | -- |
| 2015 | 88°F | 63°F | 0.33" | -- |
| 2014 | 84°F | 59°F | 0.18" | -- |
| 2013 | 72°F | 39°F | 0" | -- |
| 2012 | 85°F | 67°F | 0.38" | -- |
| 2011 | 85°F | 62°F | 0" | -- |
| 2010 | 89°F | 60°F | 0.03" | -- |
| 2009 | 66°F | 48°F | 0.05" | -- |
| 2008 | 85°F | 54°F | 0.61" | -- |
| 2007 | 89°F | 61°F | 1.6" | -- |
| 2006 | 82°F | 59°F | 0" | -- |
| 2005 | 81°F | 48°F | 0" | -- |
| 2004 | 77°F | 61°F | 1.3" | -- |
| 2003 | 64°F | 47°F | 0" | -- |
| 2002 | 80°F | 60°F | 0" | -- |
| 2001 | 67°F | 55°F | 1.3" | -- |
| 2000 | 65°F | 49°F | 0" | -- |
| 1999 | 72°F | 47°F | 0" | -- |
| 1998 | 82°F | 56°F | 0" | -- |
| 1997 | 66°F | 46°F | 0" | -- |
| 1996 | 60°F | 51°F | 0.56" | -- |
| 1995 | 78°F | 55°F | 0" | -- |
| 1994 | 64°F | 45°F | 0" | -- |
| 1993 | 75°F | 51°F | 0" | -- |
| 1992 | 65°F | 48°F | 0" | -- |
| 1991 | 91°F | 66°F | 1.42" | -- |
| 1990 | 74°F | 54°F | 0" | -- |
| 1989 | 74°F | 55°F | 0" | -- |
| 1988 | 80°F | 45°F | 0" | -- |
| 1987 | 62°F | 54°F | 0.08" | -- |
| 1986 | 76°F | 54°F | 0" | -- |
| 1985 | 88°F | 59°F | 0.25" | -- |
| 1984 | 76°F | 55°F | 0" | -- |
| 1983 | 68°F | 48°F | 0.53" | -- |
| 1982 | 79°F | 56°F | 0" | -- |
| 1981 | 83°F | 61°F | 0" | -- |
| 1980 | 74°F | 47°F | 0" | -- |
| 1979 | 67°F | 47°F | 0" | -- |
| 1978 | 81°F | 62°F | 0" | -- |
| 1977 | 86°F | 51°F | 0" | -- |
| 1976 | 75°F | 43°F | 0" | -- |
| 1975 | 81°F | 63°F | 0.08" | -- |
| 1974 | 60°F | 49°F | 0.18" | -- |
| 1973 | 54°F | 47°F | 0.66" | -- |
| 1972 | 74°F | 38°F | 0" | -- |
| 1971 | 65°F | 44°F | 0" | -- |
Based on 55 years of data from NOAA station: ALLENTOWN LEHIGH VLY INTL AP
Monthly Climate Averages
Historical temperature and precipitation averages for Allentown, PA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.