Moriches weather by month
What a typical year looks like in Moriches, New York: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Islip-Li Macarthur Airport, 23 km from Moriches; records cover 1963–2026.
The year at a glance
- Precipitation a year
- 46 in1168 mm
- Snow a year
- 32 in81 cm
- Last spring freeze
- Apr 10
- First fall freeze
- Oct 31
- Heating degree days
- 5,185
- Cooling degree days
- 885
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 9°−13° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Moriches in January
Highs average 39°4° and lows 25°−4°, with 3.7 in93 mm of precipitation and 10 in26 cm of snow in a typical January.
- Record high
- 69°21° (2002)
- Record low
- −8°−22° (1965)
- Heating degree days
- 1026
- Cooling degree days
- 0
Moriches in February
Highs average 41°5° and lows 26°−4°, with 3.3 in84 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 71°22° (2023)
- Record low
- −14°−26° (1967)
- Heating degree days
- 889
- Cooling degree days
- 0
Moriches in March
Highs average 48°9° and lows 32°0°, with 4.5 in115 mm of precipitation and 7 in17 cm of snow in a typical March.
- Record high
- 82°28° (1990)
- Record low
- 0°−18° (1967)
- Heating degree days
- 780
- Cooling degree days
- 0
Moriches in April
Highs average 58°15° and lows 41°5°, with 4.1 in103 mm of precipitation and 0.6 in1.5 cm of snow in a typical April.
- Record high
- 94°34° (2002)
- Record low
- 16°−9° (1969)
- Heating degree days
- 460
- Cooling degree days
- 2
Moriches in May
Highs average 68°20° and lows 51°10°, with 3.3 in83 mm of precipitation in a typical May.
- Record high
- 98°37° (1996)
- Record low
- 32°0° (2008)
- Heating degree days
- 196
- Cooling degree days
- 27
Moriches in June
Highs average 77°25° and lows 61°16°, with 4 in102 mm of precipitation in a typical June.
- Record high
- 101°38° (2025)
- Record low
- 42°6° (1967)
- Heating degree days
- 30
- Cooling degree days
- 152
Moriches in July
Highs average 83°28° and lows 67°20°, with 3.3 in83 mm of precipitation in a typical July.
- Record high
- 104°40° (1966)
- Record low
- 49°9° (1965)
- Heating degree days
- 1
- Cooling degree days
- 312
Moriches in August
Highs average 81°27° and lows 66°19°, with 4.2 in108 mm of precipitation in a typical August.
- Record high
- 100°38° (1975)
- Record low
- 45°7° (1965)
- Heating degree days
- 2
- Cooling degree days
- 271
Moriches in September
Highs average 75°24° and lows 59°15°, with 3.6 in91 mm of precipitation in a typical September.
- Record high
- 94°34° (1973)
- Record low
- 38°3° (1963)
- Heating degree days
- 53
- Cooling degree days
- 108
Moriches in OctoberThis month
Highs average 64°18° and lows 47°8°, with 4 in101 mm of precipitation in a typical October.
- Record high
- 89°32° (2019)
- Record low
- 23°−5° (1966)
- Heating degree days
- 301
- Cooling degree days
- 13
Moriches in November
Highs average 54°12° and lows 38°3°, with 3.4 in87 mm of precipitation and 0.5 in1.3 cm of snow in a typical November.
- Record high
- 80°27° (2022)
- Record low
- 11°−12° (1989)
- Heating degree days
- 582
- Cooling degree days
- 0
Moriches in December
Highs average 44°7° and lows 30°−1°, with 4.7 in120 mm of precipitation and 5 in11 cm of snow in a typical December.
- Record high
- 77°25° (1998)
- Record low
- −1°−18° (1963)
- Heating degree days
- 865
- Cooling degree days
- 0