Andover weather by month
What a typical year looks like in Andover, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Andover No. 2, 0 km from Andover; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 24 in609 mm
- Snow a year
- Rare
- Last spring freeze
- May 12
- First fall freeze
- Oct 6
- Heating degree days
- 8,121
- Cooling degree days
- 592
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −18°−28° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Andover in January
Highs average 22°−6° and lows 5°−15°, with 0.57 in14 mm of precipitation in a typical January.
- Record high
- 57°14° (2012)
- Record low
- −35°−37° (2009)
- Heating degree days
- 1610
- Cooling degree days
- 0
Andover in February
Highs average 27°−3° and lows 9°−13°, with 0.57 in14 mm of precipitation in a typical February.
- Record high
- 60°16° (2016)
- Record low
- −29°−34° (2011)
- Heating degree days
- 1320
- Cooling degree days
- 0
Andover in March
Highs average 40°5° and lows 21°−6°, with 0.92 in23 mm of precipitation in a typical March.
- Record high
- 84°29° (2012)
- Record low
- −25°−32° (2019)
- Heating degree days
- 1059
- Cooling degree days
- 0
Andover in April
Highs average 56°13° and lows 33°1°, with 2 in51 mm of precipitation in a typical April.
- Record high
- 90°32° (2026)
- Record low
- 2°−17° (2023)
- Heating degree days
- 620
- Cooling degree days
- 1
Andover in May
Highs average 68°20° and lows 46°8°, with 3.2 in81 mm of precipitation in a typical May.
- Record high
- 97°36° (2018)
- Record low
- 18°−8° (2013)
- Heating degree days
- 276
- Cooling degree days
- 28
Andover in June
Highs average 77°25° and lows 56°13°, with 3.9 in100 mm of precipitation in a typical June.
- Record high
- 102°39° (2002)
- Record low
- 35°2° (2007)
- Heating degree days
- 58
- Cooling degree days
- 110
Andover in July
Highs average 82°28° and lows 61°16°, with 3.8 in97 mm of precipitation in a typical July.
- Record high
- 104°40° (2006)
- Record low
- 42°6° (2013)
- Heating degree days
- 15
- Cooling degree days
- 216
Andover in August
Highs average 80°27° and lows 59°15°, with 2.7 in70 mm of precipitation in a typical August.
- Record high
- 105°41° (2003)
- Record low
- 37°3° (2009)
- Heating degree days
- 24
- Cooling degree days
- 172
Andover in September
Highs average 73°23° and lows 50°10°, with 2.5 in63 mm of precipitation in a typical September.
- Record high
- 97°36° (2023)
- Record low
- 24°−4° (2012)
- Heating degree days
- 168
- Cooling degree days
- 60
Andover in OctoberThis month
Highs average 58°14° and lows 37°3°, with 2.2 in56 mm of precipitation in a typical October.
- Record high
- 89°32° (2023)
- Record low
- 4°−16° (2020)
- Heating degree days
- 560
- Cooling degree days
- 5
Andover in November
Highs average 41°5° and lows 23°−5°, with 0.78 in20 mm of precipitation in a typical November.
- Record high
- 77°25° (2016)
- Record low
- −14°−26° (2014)
- Heating degree days
- 987
- Cooling degree days
- 0
Andover in December
Highs average 28°−2° and lows 11°−12°, with 0.81 in21 mm of precipitation in a typical December.
- Record high
- 64°18° (2023)
- Record low
- −29°−34° (2013)
- Heating degree days
- 1424
- Cooling degree days
- 0