South Haven weather by month
What a typical year looks like in South Haven, Indiana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Wanatah 2 Wnw, 21 km from South Haven; records cover 1961–2026.
The year at a glance
- Precipitation a year
- 39.5 in1002 mm
- Snow a year
- 34 in85 cm
- Last spring freeze
- Apr 30
- First fall freeze
- Oct 4
- Heating degree days
- 6,430
- Cooling degree days
- 756
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 94°34° (cooling, 1%).
Month by month
South Haven in January
Highs average 32°0° and lows 15°−9°, with 2.1 in54 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 66°19° (2008)
- Record low
- −26°−32° (1999)
- Heating degree days
- 1288
- Cooling degree days
- 0
South Haven in February
Highs average 35°2° and lows 18°−8°, with 1.9 in48 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 72°22° (2000)
- Record low
- −21°−29° (1978)
- Heating degree days
- 1068
- Cooling degree days
- 0
South Haven in March
Highs average 47°8° and lows 27°−3°, with 2.4 in60 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 87°31° (2012)
- Record low
- −13°−25° (2015)
- Heating degree days
- 872
- Cooling degree days
- 1
South Haven in April
Highs average 59°15° and lows 37°3°, with 3.8 in96 mm of precipitation and 0.8 in2 cm of snow in a typical April.
- Record high
- 90°32° (1986)
- Record low
- 10°−12° (1972)
- Heating degree days
- 514
- Cooling degree days
- 6
South Haven in May
Highs average 71°22° and lows 49°9°, with 4 in102 mm of precipitation in a typical May.
- Record high
- 98°37° (2012)
- Record low
- 26°−3° (1966)
- Heating degree days
- 219
- Cooling degree days
- 59
South Haven in June
Highs average 80°27° and lows 59°15°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 105°41° (1988)
- Record low
- 33°1° (1998)
- Heating degree days
- 39
- Cooling degree days
- 180
South Haven in July
Highs average 83°28° and lows 62°17°, with 4.2 in106 mm of precipitation in a typical July.
- Record high
- 102°39° (2012)
- Record low
- 40°4° (2019)
- Heating degree days
- 10
- Cooling degree days
- 239
South Haven in August
Highs average 81°27° and lows 59°15°, with 4.4 in111 mm of precipitation in a typical August.
- Record high
- 101°38° (1988)
- Record low
- 38°3° (1965)
- Heating degree days
- 19
- Cooling degree days
- 182
South Haven in September
Highs average 76°24° and lows 51°11°, with 3.3 in83 mm of precipitation in a typical September.
- Record high
- 96°36° (1999)
- Record low
- 27°−3° (1999)
- Heating degree days
- 118
- Cooling degree days
- 79
South Haven in OctoberThis month
Highs average 63°17° and lows 41°5°, with 3.8 in96 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 89°32° (1963)
- Record low
- 18°−8° (1988)
- Heating degree days
- 414
- Cooling degree days
- 10
South Haven in November
Highs average 49°9° and lows 31°−1°, with 2.9 in73 mm of precipitation and 1.4 in3.6 cm of snow in a typical November.
- Record high
- 83°28° (2003)
- Record low
- 2°−17° (1976)
- Heating degree days
- 758
- Cooling degree days
- 0
South Haven in December
Highs average 37°3° and lows 22°−6°, with 2.1 in54 mm of precipitation and 7 in17 cm of snow in a typical December.
- Record high
- 70°21° (1982)
- Record low
- −20°−29° (1983)
- Heating degree days
- 1111
- Cooling degree days
- 0