St. Bonaventure weather by month
What a typical year looks like in St. Bonaventure, New York: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Allegany State Park, 23 km from St. Bonaventure; records cover 1924–2026.
The year at a glance
- Precipitation a year
- 46.6 in1185 mm
- Snow a year
- Rare
- Last spring freeze
- May 16
- First fall freeze
- Oct 4
- Heating degree days
- 7,205
- Cooling degree days
- 317
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −7°−22° (heating, 99%) and 87°31° (cooling, 1%).
Month by month
St. Bonaventure in January
Highs average 32°0° and lows 15°−9°, with 3.5 in88 mm of precipitation in a typical January.
- Record high
- 72°22° (1950)
- Record low
- −27°−33° (1948)
- Heating degree days
- 1293
- Cooling degree days
- 0
St. Bonaventure in February
Highs average 34°1° and lows 15°−9°, with 2.5 in63 mm of precipitation in a typical February.
- Record high
- 72°22° (2017)
- Record low
- −35°−37° (1934)
- Heating degree days
- 1137
- Cooling degree days
- 0
St. Bonaventure in March
Highs average 42°6° and lows 21°−6°, with 2.9 in73 mm of precipitation in a typical March.
- Record high
- 82°28° (1938)
- Record low
- −18°−28° (1950)
- Heating degree days
- 1026
- Cooling degree days
- 0
St. Bonaventure in April
Highs average 56°13° and lows 32°0°, with 4 in102 mm of precipitation in a typical April.
- Record high
- 89°32° (1990)
- Record low
- 7°−14° (1964)
- Heating degree days
- 630
- Cooling degree days
- 1
St. Bonaventure in May
Highs average 68°20° and lows 43°6°, with 4.1 in103 mm of precipitation in a typical May.
- Record high
- 90°32° (1996)
- Record low
- 18°−8° (1928)
- Heating degree days
- 318
- Cooling degree days
- 21
St. Bonaventure in June
Highs average 76°24° and lows 52°11°, with 4.6 in117 mm of precipitation in a typical June.
- Record high
- 94°34° (1934)
- Record low
- 24°−4° (1926)
- Heating degree days
- 97
- Cooling degree days
- 63
St. Bonaventure in July
Highs average 79°26° and lows 56°13°, with 5.1 in130 mm of precipitation in a typical July.
- Record high
- 101°38° (1936)
- Record low
- 25°−4° (1963)
- Heating degree days
- 36
- Cooling degree days
- 114
St. Bonaventure in August
Highs average 78°25° and lows 55°13°, with 4.2 in106 mm of precipitation in a typical August.
- Record high
- 97°36° (1935)
- Record low
- 28°−2° (1934)
- Heating degree days
- 50
- Cooling degree days
- 87
St. Bonaventure in September
Highs average 71°22° and lows 48°9°, with 4.2 in106 mm of precipitation in a typical September.
- Record high
- 97°36° (1953)
- Record low
- 20°−7° (1959)
- Heating degree days
- 192
- Cooling degree days
- 29
St. Bonaventure in OctoberThis month
Highs average 59°15° and lows 38°3°, with 4.3 in108 mm of precipitation in a typical October.
- Record high
- 90°32° (1927)
- Record low
- 12°−11° (1940)
- Heating degree days
- 512
- Cooling degree days
- 2
St. Bonaventure in November
Highs average 47°8° and lows 30°−1°, with 3.8 in96 mm of precipitation in a typical November.
- Record high
- 81°27° (1950)
- Record low
- −4°−20° (1924)
- Heating degree days
- 800
- Cooling degree days
- 0
St. Bonaventure in December
Highs average 36°2° and lows 22°−6°, with 3.7 in93 mm of precipitation in a typical December.
- Record high
- 70°21° (1941)
- Record low
- −22°−30° (1933)
- Heating degree days
- 1114
- Cooling degree days
- 0