South Heart weather by month
What a typical year looks like in South Heart, North Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Dickinson Theodore Roosevelt Regional Airport, 17 km from South Heart; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 15.6 in397 mm
- Snow a year
- Rare
- Last spring freeze
- May 17
- First fall freeze
- Sep 22
- Heating degree days
- 8,472
- Cooling degree days
- 418
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −20°−29° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
South Heart in January
Highs average 27°−3° and lows 6°−14°, with 0.25 in6.4 mm of precipitation in a typical January.
- Record high
- 63°17° (1981)
- Record low
- −35°−37° (1950)
- Heating degree days
- 1506
- Cooling degree days
- 0
South Heart in February
Highs average 30°−1° and lows 9°−13°, with 0.32 in8.1 mm of precipitation in a typical February.
- Record high
- 68°20° (1992)
- Record low
- −36°−38° (2025)
- Heating degree days
- 1271
- Cooling degree days
- 0
South Heart in March
Highs average 42°6° and lows 19°−7°, with 0.56 in14 mm of precipitation in a typical March.
- Record high
- 80°27° (2015)
- Record low
- −28°−33° (1962)
- Heating degree days
- 1074
- Cooling degree days
- 0
South Heart in April
Highs average 55°13° and lows 28°−2°, with 1.4 in35 mm of precipitation in a typical April.
- Record high
- 94°34° (1980)
- Record low
- −10°−23° (1975)
- Heating degree days
- 704
- Cooling degree days
- 0
South Heart in May
Highs average 66°19° and lows 40°4°, with 2.6 in65 mm of precipitation in a typical May.
- Record high
- 99°37° (1980)
- Record low
- 4°−16° (1967)
- Heating degree days
- 384
- Cooling degree days
- 8
South Heart in June
Highs average 76°24° and lows 49°10°, with 3.1 in77 mm of precipitation in a typical June.
- Record high
- 104°40° (1979)
- Record low
- 30°−1° (1969)
- Heating degree days
- 124
- Cooling degree days
- 49
South Heart in July
Highs average 84°29° and lows 55°13°, with 2.6 in65 mm of precipitation in a typical July.
- Record high
- 109°43° (1981)
- Record low
- 35°2° (1967)
- Heating degree days
- 30
- Cooling degree days
- 167
South Heart in August
Highs average 84°29° and lows 53°12°, with 1.5 in39 mm of precipitation in a typical August.
- Record high
- 108°42° (1949)
- Record low
- 32°0° (1950)
- Heating degree days
- 47
- Cooling degree days
- 154
South Heart in September
Highs average 73°23° and lows 44°7°, with 1.6 in41 mm of precipitation in a typical September.
- Record high
- 104°40° (1978)
- Record low
- 17°−8° (1974)
- Heating degree days
- 234
- Cooling degree days
- 38
South Heart in OctoberThis month
Highs average 56°14° and lows 31°0°, with 1.2 in30 mm of precipitation in a typical October.
- Record high
- 95°35° (2011)
- Record low
- −7°−22° (1991)
- Heating degree days
- 659
- Cooling degree days
- 2
South Heart in November
Highs average 41°5° and lows 19°−7°, with 0.47 in12 mm of precipitation in a typical November.
- Record high
- 80°27° (1999)
- Record low
- −18°−28° (1955)
- Heating degree days
- 1041
- Cooling degree days
- 0
South Heart in December
Highs average 30°−1° and lows 10°−12°, with 0.19 in4.8 mm of precipitation in a typical December.
- Record high
- 68°20° (2021)
- Record low
- −34°−37° (1989)
- Heating degree days
- 1398
- Cooling degree days
- 0