Andover weather by month
What a typical year looks like in Andover, New Jersey: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Aeroflex-Andover Airport, 3 km from Andover; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 48.8 in1240 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 24
- First fall freeze
- Oct 18
- Heating degree days
- 5,928
- Cooling degree days
- 669
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−17° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Andover in January
Highs average 36°2° and lows 19°−7°, with 3.3 in83 mm of precipitation in a typical January.
- Record high
- 69°21° (2007)
- Record low
- −15°−26° (2005)
- Heating degree days
- 1165
- Cooling degree days
- 0
Andover in February
Highs average 39°4° and lows 20°−7°, with 2.8 in72 mm of precipitation in a typical February.
- Record high
- 77°25° (2018)
- Record low
- −14°−26° (2015)
- Heating degree days
- 997
- Cooling degree days
- 0
Andover in March
Highs average 48°9° and lows 28°−2°, with 4.1 in103 mm of precipitation in a typical March.
- Record high
- 79°26° (2021)
- Record low
- −8°−22° (2003)
- Heating degree days
- 842
- Cooling degree days
- 0
Andover in April
Highs average 61°16° and lows 38°3°, with 3.8 in96 mm of precipitation in a typical April.
- Record high
- 92°33° (2002)
- Record low
- 20°−7° (2002)
- Heating degree days
- 470
- Cooling degree days
- 5
Andover in May
Highs average 71°22° and lows 48°9°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 95°35° (2022)
- Record low
- 30°−1° (2020)
- Heating degree days
- 205
- Cooling degree days
- 34
Andover in June
Highs average 79°26° and lows 57°14°, with 4.5 in115 mm of precipitation in a typical June.
- Record high
- 98°37° (2025)
- Record low
- 38°3° (2001)
- Heating degree days
- 38
- Cooling degree days
- 130
Andover in July
Highs average 84°29° and lows 62°17°, with 5.1 in129 mm of precipitation in a typical July.
- Record high
- 101°38° (2011)
- Record low
- 46°8° (2001)
- Heating degree days
- 4
- Cooling degree days
- 243
Andover in August
Highs average 82°28° and lows 60°16°, with 4.9 in123 mm of precipitation in a typical August.
- Record high
- 99°37° (2001)
- Record low
- 45°7° (2000)
- Heating degree days
- 11
- Cooling degree days
- 191
Andover in September
Highs average 74°24° and lows 52°11°, with 4.3 in110 mm of precipitation in a typical September.
- Record high
- 93°34° (2008)
- Record low
- 34°1° (1998)
- Heating degree days
- 108
- Cooling degree days
- 60
Andover in OctoberThis month
Highs average 63°17° and lows 42°5°, with 4.6 in118 mm of precipitation in a typical October.
- Record high
- 92°33° (2019)
- Record low
- 23°−5° (2015)
- Heating degree days
- 400
- Cooling degree days
- 6
Andover in November
Highs average 52°11° and lows 32°0°, with 3.4 in87 mm of precipitation in a typical November.
- Record high
- 79°26° (2020)
- Record low
- 8°−13° (2018)
- Heating degree days
- 690
- Cooling degree days
- 0
Andover in December
Highs average 41°5° and lows 25°−4°, with 4.2 in106 mm of precipitation in a typical December.
- Record high
- 73°23° (1998)
- Record low
- −2°−19° (2005)
- Heating degree days
- 998
- Cooling degree days
- 0