Fort Pierre weather by month
What a typical year looks like in Fort Pierre, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at PIERRE REGIONAL AP, 8 km from Fort Pierre; records cover 1933–2026.
The year at a glance
- Precipitation a year
- 20.2 in513 mm
- Snow a year
- 37 in94 cm
- Last spring freeze
- May 9
- First fall freeze
- Oct 4
- Heating degree days
- 7,349
- Cooling degree days
- 836
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −12°−24° (heating, 99%) and 102°39° (cooling, 1%).
Month by month
Fort Pierre in January
Highs average 29°−2° and lows 9°−13°, with 0.45 in11 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 68°20° (1981)
- Record low
- −33°−36° (1966)
- Heating degree days
- 1421
- Cooling degree days
- 0
Fort Pierre in February
Highs average 34°1° and lows 13°−11°, with 0.74 in19 mm of precipitation and 8 in20 cm of snow in a typical February.
- Record high
- 75°24° (1992)
- Record low
- −35°−37° (1994)
- Heating degree days
- 1172
- Cooling degree days
- 0
Fort Pierre in March
Highs average 46°8° and lows 23°−5°, with 0.96 in24 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 88°31° (2012)
- Record low
- −20°−29° (2014)
- Heating degree days
- 952
- Cooling degree days
- 0
Fort Pierre in April
Highs average 59°15° and lows 33°1°, with 1.9 in49 mm of precipitation and 5 in13 cm of snow in a typical April.
- Record high
- 98°37° (1980)
- Record low
- 0°−18° (2018)
- Heating degree days
- 575
- Cooling degree days
- 2
Fort Pierre in May
Highs average 70°21° and lows 45°7°, with 3.3 in83 mm of precipitation in a typical May.
- Record high
- 105°41° (1934)
- Record low
- 21°−6° (2013)
- Heating degree days
- 269
- Cooling degree days
- 27
Fort Pierre in June
Highs average 80°27° and lows 56°13°, with 3.7 in94 mm of precipitation in a typical June.
- Record high
- 112°44° (1988)
- Record low
- 34°1° (1998)
- Heating degree days
- 50
- Cooling degree days
- 134
Fort Pierre in July
Highs average 88°31° and lows 62°16°, with 2.4 in61 mm of precipitation in a typical July.
- Record high
- 117°47° (2006)
- Record low
- 42°6° (1959)
- Heating degree days
- 6
- Cooling degree days
- 314
Fort Pierre in August
Highs average 87°30° and lows 59°15°, with 2 in50 mm of precipitation in a typical August.
- Record high
- 114°46° (1937)
- Record low
- 39°4° (1964)
- Heating degree days
- 15
- Cooling degree days
- 262
Fort Pierre in September
Highs average 78°25° and lows 50°10°, with 1.7 in44 mm of precipitation in a typical September.
- Record high
- 108°42° (1983)
- Record low
- 21°−6° (1951)
- Heating degree days
- 134
- Cooling degree days
- 91
Fort Pierre in OctoberThis month
Highs average 61°16° and lows 36°2°, with 1.7 in43 mm of precipitation and 1.3 in3.3 cm of snow in a typical October.
- Record high
- 98°37° (1993)
- Record low
- 2°−17° (2020)
- Heating degree days
- 519
- Cooling degree days
- 6
Fort Pierre in November
Highs average 45°7° and lows 23°−5°, with 0.77 in20 mm of precipitation and 6 in16 cm of snow in a typical November.
- Record high
- 87°31° (1999)
- Record low
- −18°−28° (1959)
- Heating degree days
- 928
- Cooling degree days
- 0
Fort Pierre in December
Highs average 32°0° and lows 13°−10°, with 0.64 in16 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 77°25° (1998)
- Record low
- −31°−35° (1990)
- Heating degree days
- 1308
- Cooling degree days
- 0