Henniker weather by month
What a typical year looks like in Henniker, New Hampshire: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Salisbury, 20 km from Henniker; records cover 1996–2026.
The year at a glance
- Precipitation a year
- 48.6 in1235 mm
- Snow a year
- Rare
- Last spring freeze
- May 13
- First fall freeze
- Oct 3
- Heating degree days
- 7,416
- Cooling degree days
- 325
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 91°33° (cooling, 1%).
Month by month
Henniker in January
Highs average 31°0° and lows 13°−10°, with 3.3 in84 mm of precipitation in a typical January.
- Record high
- 67°19° (2007)
- Record low
- −20°−29° (2009)
- Heating degree days
- 1328
- Cooling degree days
- 0
Henniker in February
Highs average 34°1° and lows 15°−10°, with 3.2 in81 mm of precipitation in a typical February.
- Record high
- 70°21° (2018)
- Record low
- −18°−28° (2003)
- Heating degree days
- 1132
- Cooling degree days
- 0
Henniker in March
Highs average 42°6° and lows 22°−5°, with 3.5 in89 mm of precipitation in a typical March.
- Record high
- 81°27° (1998)
- Record low
- −10°−23° (2007)
- Heating degree days
- 1014
- Cooling degree days
- 0
Henniker in April
Highs average 55°13° and lows 31°−1°, with 4 in103 mm of precipitation in a typical April.
- Record high
- 91°33° (2002)
- Record low
- 12°−11° (2003)
- Heating degree days
- 664
- Cooling degree days
- 1
Henniker in May
Highs average 67°19° and lows 41°5°, with 4.1 in104 mm of precipitation in a typical May.
- Record high
- 93°34° (2010)
- Record low
- 25°−4° (2008)
- Heating degree days
- 355
- Cooling degree days
- 11
Henniker in June
Highs average 75°24° and lows 51°11°, with 4.5 in115 mm of precipitation in a typical June.
- Record high
- 96°36° (2025)
- Record low
- 33°1° (2002)
- Heating degree days
- 117
- Cooling degree days
- 58
Henniker in July
Highs average 80°27° and lows 57°14°, with 4.1 in104 mm of precipitation in a typical July.
- Record high
- 97°36° (2010)
- Record low
- 42°6° (2000)
- Heating degree days
- 27
- Cooling degree days
- 133
Henniker in August
Highs average 79°26° and lows 55°13°, with 4.4 in112 mm of precipitation in a typical August.
- Record high
- 97°36° (2002)
- Record low
- 37°3° (2007)
- Heating degree days
- 46
- Cooling degree days
- 96
Henniker in September
Highs average 71°22° and lows 46°8°, with 3.9 in100 mm of precipitation in a typical September.
- Record high
- 95°35° (2010)
- Record low
- 25°−4° (2000)
- Heating degree days
- 214
- Cooling degree days
- 25
Henniker in OctoberThis month
Highs average 58°15° and lows 36°2°, with 5.1 in130 mm of precipitation in a typical October.
- Record high
- 84°29° (2025)
- Record low
- 18°−8° (2002)
- Heating degree days
- 551
- Cooling degree days
- 1
Henniker in November
Highs average 47°8° and lows 29°−2°, with 4.1 in103 mm of precipitation in a typical November.
- Record high
- 77°25° (2024)
- Record low
- 2°−17° (2018)
- Heating degree days
- 818
- Cooling degree days
- 0
Henniker in December
Highs average 36°2° and lows 20°−7°, with 4.4 in110 mm of precipitation in a typical December.
- Record high
- 72°22° (1998)
- Record low
- −10°−23° (2016)
- Heating degree days
- 1150
- Cooling degree days
- 0