Millheim weather by month
What a typical year looks like in Millheim, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Millheim, 1 km from Millheim; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 42.4 in1078 mm
- Snow a year
- 35 in90 cm
- Last spring freeze
- May 16
- First fall freeze
- Oct 5
- Heating degree days
- 6,659
- Cooling degree days
- 536
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −2°−19° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Millheim in January
Highs average 32°0° and lows 15°−10°, with 3 in75 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 65°18° (2008)
- Record low
- −17°−27° (2009)
- Heating degree days
- 1288
- Cooling degree days
- 0
Millheim in February
Highs average 37°3° and lows 17°−8°, with 2.3 in59 mm of precipitation and 8 in21 cm of snow in a typical February.
- Record high
- 74°23° (2017)
- Record low
- −14°−26° (2015)
- Heating degree days
- 1064
- Cooling degree days
- 0
Millheim in March
Highs average 46°8° and lows 25°−4°, with 3.3 in85 mm of precipitation and 8 in21 cm of snow in a typical March.
- Record high
- 84°29° (2026)
- Record low
- −6°−21° (2015)
- Heating degree days
- 925
- Cooling degree days
- 0
Millheim in April
Highs average 60°15° and lows 35°2°, with 3.6 in92 mm of precipitation and 1 in2.5 cm of snow in a typical April.
- Record high
- 91°33° (2009)
- Record low
- 15°−9° (2013)
- Heating degree days
- 536
- Cooling degree days
- 2
Millheim in May
Highs average 71°22° and lows 45°7°, with 3.9 in99 mm of precipitation in a typical May.
- Record high
- 95°35° (2006)
- Record low
- 24°−4° (2005)
- Heating degree days
- 244
- Cooling degree days
- 26
Millheim in June
Highs average 79°26° and lows 55°13°, with 4 in102 mm of precipitation in a typical June.
- Record high
- 97°36° (2025)
- Record low
- 34°1° (2009)
- Heating degree days
- 52
- Cooling degree days
- 112
Millheim in July
Highs average 84°29° and lows 58°15°, with 3.9 in100 mm of precipitation in a typical July.
- Record high
- 105°41° (2011)
- Record low
- 41°5° (2010)
- Heating degree days
- 9
- Cooling degree days
- 200
Millheim in August
Highs average 82°28° and lows 56°13°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 97°36° (2005)
- Record low
- 35°2° (2025)
- Heating degree days
- 22
- Cooling degree days
- 146
Millheim in September
Highs average 74°23° and lows 49°9°, with 4.4 in112 mm of precipitation in a typical September.
- Record high
- 94°34° (2002)
- Record low
- 26°−3° (2000)
- Heating degree days
- 154
- Cooling degree days
- 46
Millheim in OctoberThis month
Highs average 62°16° and lows 38°3°, with 3.7 in93 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 87°31° (2007)
- Record low
- 19°−7° (2001)
- Heating degree days
- 478
- Cooling degree days
- 4
Millheim in November
Highs average 48°9° and lows 29°−2°, with 3.1 in78 mm of precipitation and 2.2 in5.6 cm of snow in a typical November.
- Record high
- 80°27° (2024)
- Record low
- 5°−15° (2013)
- Heating degree days
- 794
- Cooling degree days
- 0
Millheim in December
Highs average 38°3° and lows 22°−6°, with 3.2 in81 mm of precipitation and 6 in15 cm of snow in a typical December.
- Record high
- 69°21° (2001)
- Record low
- −12°−24° (2005)
- Heating degree days
- 1093
- Cooling degree days
- 0