Boyertown weather by month
What a typical year looks like in Boyertown, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Heritage Field Airport, 13 km from Boyertown; records cover 1999–2026.
The year at a glance
- Precipitation a year
- 45.3 in1152 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 16
- First fall freeze
- Oct 19
- Heating degree days
- 5,533
- Cooling degree days
- 793
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Boyertown in January
Highs average 37°3° and lows 22°−6°, with 3 in77 mm of precipitation in a typical January.
- Record high
- 71°22° (2007)
- Record low
- −7°−22° (2019)
- Heating degree days
- 1094
- Cooling degree days
- 0
Boyertown in February
Highs average 40°5° and lows 23°−5°, with 2.6 in65 mm of precipitation in a typical February.
- Record high
- 78°26° (2018)
- Record low
- −2°−19° (2019)
- Heating degree days
- 927
- Cooling degree days
- 0
Boyertown in March
Highs average 49°10° and lows 30°−1°, with 4.1 in103 mm of precipitation in a typical March.
- Record high
- 84°29° (2025)
- Record low
- 0°−18° (2015)
- Heating degree days
- 783
- Cooling degree days
- 0
Boyertown in April
Highs average 61°16° and lows 40°4°, with 3.6 in92 mm of precipitation in a typical April.
- Record high
- 92°33° (2009)
- Record low
- 21°−6° (2016)
- Heating degree days
- 439
- Cooling degree days
- 9
Boyertown in May
Highs average 71°22° and lows 50°10°, with 3.7 in94 mm of precipitation in a typical May.
- Record high
- 94°34° (2011)
- Record low
- 30°−1° (2002)
- Heating degree days
- 184
- Cooling degree days
- 43
Boyertown in June
Highs average 79°26° and lows 59°15°, with 3.8 in98 mm of precipitation in a typical June.
- Record high
- 98°37° (2011)
- Record low
- 40°4° (2020)
- Heating degree days
- 32
- Cooling degree days
- 155
Boyertown in July
Highs average 84°29° and lows 64°18°, with 4.7 in120 mm of precipitation in a typical July.
- Record high
- 105°41° (2011)
- Record low
- 48°9° (2001)
- Heating degree days
- 2
- Cooling degree days
- 280
Boyertown in August
Highs average 82°28° and lows 62°17°, with 4.4 in111 mm of precipitation in a typical August.
- Record high
- 101°38° (2001)
- Record low
- 47°8° (2000)
- Heating degree days
- 7
- Cooling degree days
- 219
Boyertown in September
Highs average 75°24° and lows 55°13°, with 4.8 in123 mm of precipitation in a typical September.
- Record high
- 98°37° (2010)
- Record low
- 34°1° (2020)
- Heating degree days
- 87
- Cooling degree days
- 78
Boyertown in OctoberThis month
Highs average 63°17° and lows 43°6°, with 3.8 in97 mm of precipitation in a typical October.
- Record high
- 91°33° (2019)
- Record low
- 25°−4° (2015)
- Heating degree days
- 371
- Cooling degree days
- 9
Boyertown in November
Highs average 52°11° and lows 34°1°, with 3 in77 mm of precipitation in a typical November.
- Record high
- 83°28° (2024)
- Record low
- 11°−12° (2018)
- Heating degree days
- 658
- Cooling degree days
- 0
Boyertown in December
Highs average 42°6° and lows 27°−3°, with 3.8 in96 mm of precipitation in a typical December.
- Record high
- 73°23° (2001)
- Record low
- 0°−18° (2005)
- Heating degree days
- 949
- Cooling degree days
- 0