Arnold City weather by month
What a typical year looks like in Arnold City, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Donora 1 SW, 7 km from Arnold City; records cover 1926–2026.
The year at a glance
- Precipitation a year
- 40.9 in1038 mm
- Snow a year
- 21 in54 cm
- Last spring freeze
- Apr 24
- First fall freeze
- Oct 25
- Heating degree days
- 5,463
- Cooling degree days
- 811
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 4°−16° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Arnold City in January
Highs average 39°4° and lows 21°−6°, with 2.9 in74 mm of precipitation and 6 in14 cm of snow in a typical January.
- Record high
- 78°26° (1950)
- Record low
- −19°−28° (1982)
- Heating degree days
- 1097
- Cooling degree days
- 0
Arnold City in February
Highs average 42°6° and lows 22°−6°, with 2.4 in62 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 79°26° (2018)
- Record low
- −14°−26° (1934)
- Heating degree days
- 925
- Cooling degree days
- 0
Arnold City in March
Highs average 51°11° and lows 29°−2°, with 3.1 in80 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 88°31° (1929)
- Record low
- −2°−19° (1960)
- Heating degree days
- 783
- Cooling degree days
- 0
Arnold City in April
Highs average 64°18° and lows 38°4°, with 3.4 in86 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 92°33° (1930)
- Record low
- 11°−12° (1975)
- Heating degree days
- 420
- Cooling degree days
- 6
Arnold City in May
Highs average 73°23° and lows 49°9°, with 4.3 in109 mm of precipitation in a typical May.
- Record high
- 96°36° (1939)
- Record low
- 22°−6° (2005)
- Heating degree days
- 175
- Cooling degree days
- 53
Arnold City in June
Highs average 81°27° and lows 58°15°, with 4.4 in112 mm of precipitation in a typical June.
- Record high
- 101°38° (1933)
- Record low
- 37°3° (1990)
- Heating degree days
- 29
- Cooling degree days
- 161
Arnold City in July
Highs average 84°29° and lows 62°17°, with 4.3 in109 mm of precipitation in a typical July.
- Record high
- 105°41° (1930)
- Record low
- 40°4° (1983)
- Heating degree days
- 2
- Cooling degree days
- 260
Arnold City in August
Highs average 84°29° and lows 61°16°, with 3.6 in92 mm of precipitation in a typical August.
- Record high
- 105°41° (1983)
- Record low
- 38°3° (1965)
- Heating degree days
- 5
- Cooling degree days
- 225
Arnold City in September
Highs average 78°25° and lows 54°12°, with 3.6 in90 mm of precipitation in a typical September.
- Record high
- 103°39° (1953)
- Record low
- 31°−1° (1942)
- Heating degree days
- 73
- Cooling degree days
- 94
Arnold City in OctoberThis month
Highs average 66°19° and lows 42°6°, with 3.1 in77 mm of precipitation in a typical October.
- Record high
- 95°35° (1953)
- Record low
- 17°−8° (1965)
- Heating degree days
- 350
- Cooling degree days
- 12
Arnold City in November
Highs average 54°12° and lows 33°0°, with 2.8 in72 mm of precipitation and 0.5 in1.3 cm of snow in a typical November.
- Record high
- 85°29° (1961)
- Record low
- −1°−18° (1958)
- Heating degree days
- 657
- Cooling degree days
- 0
Arnold City in December
Highs average 43°6° and lows 26°−4°, with 2.9 in74 mm of precipitation and 3 in8 cm of snow in a typical December.
- Record high
- 77°25° (2006)
- Record low
- −11°−24° (1989)
- Heating degree days
- 947
- Cooling degree days
- 0