Green Hills weather by month
What a typical year looks like in Green Hills, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. No nearby active station has official 1991–2020 normals, so these are forecast.blue’s own averages computed from daily observations at Washington County Airport, 3 km from Green Hills, over its available record (2017–2026) — not an NCEI normal; records cover 2017–2026.
The year at a glance
- Precipitation a year
- 32.6 in828 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 17
- Heating degree days
- —
- Cooling degree days
- —
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Green Hills in January
Highs average 37°3° and lows 20°−6°, with 2.6 in66 mm of precipitation in a typical January.
- Record high
- 72°22° (2020)
- Record low
- −18°−28° (2026)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in February
Highs average 45°7° and lows 24°−4°, with 3.2 in81 mm of precipitation in a typical February.
- Record high
- 78°26° (2018)
- Record low
- −8°−22° (2026)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in March
Highs average 54°12° and lows 31°0°, with 3.3 in84 mm of precipitation in a typical March.
- Record high
- 85°29° (2026)
- Record low
- 5°−15° (2022)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in April
Highs average 63°17° and lows 40°4°, with 3.5 in89 mm of precipitation in a typical April.
- Record high
- 85°29° (2026)
- Record low
- 19°−7° (2021)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in May
Highs average 72°22° and lows 50°10°, with 3.5 in89 mm of precipitation in a typical May.
- Record high
- 88°31° (2018)
- Record low
- 25°−4° (2020)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in June
Highs average 80°27° and lows 58°14°, with 2.8 in71 mm of precipitation in a typical June.
- Record high
- 93°34° (2024)
- Record low
- 37°3° (2020)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in July
Highs average 84°29° and lows 63°17°, with 2.4 in61 mm of precipitation in a typical July.
- Record high
- 94°34° (2018)
- Record low
- 49°9° (2024)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in August
Highs average 82°28° and lows 61°16°, with 2.7 in69 mm of precipitation in a typical August.
- Record high
- 95°35° (2024)
- Record low
- 43°6° (2024)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in September
Highs average 77°25° and lows 54°12°, with 2 in51 mm of precipitation in a typical September.
- Record high
- 93°34° (2018)
- Record low
- 32°0° (2020)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in OctoberThis month
Highs average 66°19° and lows 43°6°, with 2.4 in61 mm of precipitation in a typical October.
- Record high
- 90°32° (2019)
- Record low
- 25°−4° (2018)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in November
Highs average 52°11° and lows 32°0°, with 2.2 in56 mm of precipitation in a typical November.
- Record high
- 80°27° (2024)
- Record low
- 10°−12° (2019)
- Heating degree days
- —
- Cooling degree days
- —
Green Hills in December
Highs average 44°6° and lows 27°−3°, with 2 in51 mm of precipitation in a typical December.
- Record high
- 68°20° (2024)
- Record low
- −4°−20° (2022)
- Heating degree days
- —
- Cooling degree days
- —