Marathon weather by month
What a typical year looks like in Marathon, New York: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Ithaca 13 E, 17 km from Marathon; records cover 2004–2026.
The year at a glance
- Precipitation a year
- 41.7 in1058 mm
- Snow a year
- Rare
- Last spring freeze
- May 18
- First fall freeze
- Oct 7
- Heating degree days
- 7,460
- Cooling degree days
- 287
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −10°−23° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Marathon in January
Highs average 30°−1° and lows 13°−10°, with 2.7 in68 mm of precipitation in a typical January.
- Record high
- 64°18° (2020)
- Record low
- −24°−31° (2005)
- Heating degree days
- 1344
- Cooling degree days
- 0
Marathon in February
Highs average 33°0° and lows 14°−10°, with 2.7 in69 mm of precipitation in a typical February.
- Record high
- 72°22° (2017)
- Record low
- −23°−31° (2015)
- Heating degree days
- 1172
- Cooling degree days
- 0
Marathon in March
Highs average 41°5° and lows 22°−6°, with 3.3 in84 mm of precipitation in a typical March.
- Record high
- 75°24° (2012)
- Record low
- −12°−24° (2015)
- Heating degree days
- 1042
- Cooling degree days
- 0
Marathon in April
Highs average 54°12° and lows 33°0°, with 3.8 in97 mm of precipitation in a typical April.
- Record high
- 90°32° (2009)
- Record low
- −4°−20° (2016)
- Heating degree days
- 646
- Cooling degree days
- 1
Marathon in May
Highs average 67°19° and lows 43°6°, with 3.6 in92 mm of precipitation in a typical May.
- Record high
- 89°32° (2006)
- Record low
- 23°−5° (2006)
- Heating degree days
- 332
- Cooling degree days
- 13
Marathon in June
Highs average 75°24° and lows 52°11°, with 4.2 in106 mm of precipitation in a typical June.
- Record high
- 91°33° (2008)
- Record low
- 31°−1° (2009)
- Heating degree days
- 105
- Cooling degree days
- 60
Marathon in July
Highs average 79°26° and lows 56°13°, with 3.7 in94 mm of precipitation in a typical July.
- Record high
- 99°37° (2011)
- Record low
- 40°4° (2007)
- Heating degree days
- 37
- Cooling degree days
- 106
Marathon in August
Highs average 77°25° and lows 54°12°, with 4 in103 mm of precipitation in a typical August.
- Record high
- 92°33° (2005)
- Record low
- 38°3° (2025)
- Heating degree days
- 63
- Cooling degree days
- 77
Marathon in September
Highs average 70°21° and lows 48°9°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 89°32° (2015)
- Record low
- 26°−3° (2020)
- Heating degree days
- 214
- Cooling degree days
- 28
Marathon in OctoberThis month
Highs average 58°15° and lows 38°3°, with 3.6 in91 mm of precipitation in a typical October.
- Record high
- 84°29° (2019)
- Record low
- 22°−6° (2012)
- Heating degree days
- 529
- Cooling degree days
- 2
Marathon in November
Highs average 46°8° and lows 29°−2°, with 3.3 in84 mm of precipitation in a typical November.
- Record high
- 75°24° (2024)
- Record low
- −12°−24° (2018)
- Heating degree days
- 828
- Cooling degree days
- 0
Marathon in December
Highs average 35°2° and lows 21°−6°, with 3.2 in81 mm of precipitation in a typical December.
- Record high
- 65°18° (2006)
- Record low
- −17°−27° (2005)
- Heating degree days
- 1148
- Cooling degree days
- 0