Allentown, PA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Allentown, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 104°F (40°C) | July 22, 2011 |
| Record Low | -14.9°F (-26°C) | January 21, 1994 |
| Lowest High | 1.9°F (-17°C) | January 19, 1994 |
| Highest Low | 78.9°F (26°C) | July 15, 1995 |
| Highest Mean | 91°F (33°C) | July 22, 2011 |
| Lowest Mean | -4.5°F (-20°C) | January 19, 1994 |
| Precipitation | ||
| Max in One Calendar Day | 8.71" (221.2 mm) | October 8, 2005 |
| Max in One Month | 13.47" (342.2 mm) | August 2011 |
| Least in One Month | 0.02" (0.6 mm) | October 2024 |
| Max in One Year | 71.76" (1822.8 mm) | 2011 |
| Least in One Year | 29.87" (758.8 mm) | 1980 |
| Snowfall | ||
| Max in One Calendar Day | 30.2" (76.7 cm) | January 23, 2016 |
| Max in One Month | 42.9" (108.9 cm) | February 2010 |
| Max in One Season | 75.4" (191.6 cm) | 1993-94 |
| Max in One Year | 74.6" (189.5 cm) | 1994 |
| Earliest Snow | 1.0" (2.5 cm) | October 10, 1979 |
| Earliest Measurable Snow | 1.0" (2.5 cm) | October 10, 1979 |
| Latest Snow | 1.1" (2.8 cm) | April 23, 1986 |
| Latest Measurable Snow | 1.1" (2.8 cm) | April 23, 1986 |
| Period of Record | ||
| Temperature | January 1, 1970 – August 1, 2026 | |
| Precipitation | January 1, 1970 – August 1, 2026 | |
| Snowfall | January 1, 1970 – August 1, 2026 | |
Note: Records compiled from NOAA GHCN-Daily observations at ALLENTOWN LEHIGH VLY INTL AP (3 mi from Allentown, PA). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Allentown, PA?
The all-time record high in Allentown, PA is 104°F (40°C), set on July 22, 2011.
What is the coldest temperature ever recorded in Allentown, PA?
The all-time record low in Allentown, PA is -14.9°F (-26°C), set on January 21, 1994.
What is the most rain Allentown, PA has ever had in one day?
The most precipitation recorded in one calendar day near Allentown, PA is 8.71 inches, on October 8, 2005.
What is the biggest snowfall ever recorded in Allentown, PA?
The most snow recorded in one calendar day near Allentown, PA is 30.2 inches, on January 23, 2016.
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Allentown Weather History
Monthly averages, records, and climate data for Allentown
Pennsylvania Weather Extremes
Statewide records and extremes for other Pennsylvania cities