Forestville weather by month
What a typical year looks like in Forestville, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Slippery Rock 1 Ssw, 7 km from Forestville; records cover 1949–2026.
The year at a glance
- Precipitation a year
- 45.2 in1149 mm
- Snow a year
- Rare
- Last spring freeze
- May 8
- First fall freeze
- Oct 8
- Heating degree days
- 6,577
- Cooling degree days
- 453
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Forestville in January
Highs average 33°1° and lows 17°−8°, with 3.5 in88 mm of precipitation in a typical January.
- Record high
- 72°22° (1950)
- Record low
- −28°−33° (1994)
- Heating degree days
- 1237
- Cooling degree days
- 0
Forestville in February
Highs average 37°3° and lows 18°−8°, with 2.7 in68 mm of precipitation in a typical February.
- Record high
- 74°23° (2017)
- Record low
- −21°−29° (1979)
- Heating degree days
- 1054
- Cooling degree days
- 0
Forestville in March
Highs average 46°8° and lows 25°−4°, with 3.4 in87 mm of precipitation in a typical March.
- Record high
- 87°31° (2012)
- Record low
- −10°−23° (1986)
- Heating degree days
- 915
- Cooling degree days
- 0
Forestville in April
Highs average 59°15° and lows 35°2°, with 3.9 in100 mm of precipitation in a typical April.
- Record high
- 89°32° (2009)
- Record low
- 9°−13° (1987)
- Heating degree days
- 553
- Cooling degree days
- 2
Forestville in May
Highs average 69°21° and lows 45°7°, with 4.1 in105 mm of precipitation in a typical May.
- Record high
- 96°36° (2015)
- Record low
- 22°−6° (1970)
- Heating degree days
- 272
- Cooling degree days
- 27
Forestville in June
Highs average 77°25° and lows 54°12°, with 4.8 in121 mm of precipitation in a typical June.
- Record high
- 99°37° (1952)
- Record low
- 30°−1° (1972)
- Heating degree days
- 78
- Cooling degree days
- 85
Forestville in July
Highs average 81°27° and lows 58°14°, with 4.6 in118 mm of precipitation in a typical July.
- Record high
- 102°39° (1988)
- Record low
- 37°3° (1979)
- Heating degree days
- 17
- Cooling degree days
- 161
Forestville in August
Highs average 80°27° and lows 56°14°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 99°37° (1953)
- Record low
- 28°−2° (1982)
- Heating degree days
- 29
- Cooling degree days
- 128
Forestville in September
Highs average 74°23° and lows 50°10°, with 4.1 in103 mm of precipitation in a typical September.
- Record high
- 99°37° (1953)
- Record low
- 27°−3° (1979)
- Heating degree days
- 143
- Cooling degree days
- 45
Forestville in OctoberThis month
Highs average 62°16° and lows 39°4°, with 3.5 in88 mm of precipitation in a typical October.
- Record high
- 91°33° (2007)
- Record low
- 12°−11° (1975)
- Heating degree days
- 456
- Cooling degree days
- 5
Forestville in November
Highs average 49°9° and lows 31°−1°, with 3.5 in88 mm of precipitation in a typical November.
- Record high
- 81°27° (1961)
- Record low
- −1°−18° (1958)
- Heating degree days
- 758
- Cooling degree days
- 0
Forestville in December
Highs average 38°3° and lows 23°−5°, with 3.2 in81 mm of precipitation in a typical December.
- Record high
- 74°23° (1982)
- Record low
- −20°−29° (1989)
- Heating degree days
- 1065
- Cooling degree days
- 0