Okaton weather by month
What a typical year looks like in Okaton, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Murdo, 15 km from Okaton; records cover 1907–2026.
The year at a glance
- Precipitation a year
- 21.7 in550 mm
- Snow a year
- 49 in125 cm
- Last spring freeze
- May 7
- First fall freeze
- Oct 9
- Heating degree days
- 7,207
- Cooling degree days
- 846
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
Okaton in January
Highs average 31°−1° and lows 12°−11°, with 0.57 in14 mm of precipitation and 8 in19 cm of snow in a typical January.
- Record high
- 75°24° (1974)
- Record low
- −35°−37° (1916)
- Heating degree days
- 1359
- Cooling degree days
- 0
Okaton in February
Highs average 34°1° and lows 14°−10°, with 0.71 in18 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 76°24° (2016)
- Record low
- −33°−36° (1917)
- Heating degree days
- 1138
- Cooling degree days
- 0
Okaton in March
Highs average 45°7° and lows 24°−4°, with 1.2 in30 mm of precipitation and 8 in21 cm of snow in a typical March.
- Record high
- 90°32° (1910)
- Record low
- −21°−29° (1960)
- Heating degree days
- 940
- Cooling degree days
- 0
Okaton in April
Highs average 57°14° and lows 34°1°, with 2.4 in60 mm of precipitation and 7 in17 cm of snow in a typical April.
- Record high
- 102°39° (1962)
- Record low
- −3°−19° (1936)
- Heating degree days
- 590
- Cooling degree days
- 2
Okaton in May
Highs average 68°20° and lows 46°8°, with 3.4 in87 mm of precipitation in a typical May.
- Record high
- 107°42° (1934)
- Record low
- 15°−9° (1909)
- Heating degree days
- 286
- Cooling degree days
- 27
Okaton in June
Highs average 79°26° and lows 57°14°, with 3.6 in92 mm of precipitation in a typical June.
- Record high
- 108°42° (1931)
- Record low
- 32°0° (1908)
- Heating degree days
- 60
- Cooling degree days
- 135
Okaton in July
Highs average 87°30° and lows 63°17°, with 2.8 in72 mm of precipitation in a typical July.
- Record high
- 116°47° (1936)
- Record low
- 40°4° (1915)
- Heating degree days
- 7
- Cooling degree days
- 306
Okaton in August
Highs average 85°30° and lows 61°16°, with 2.4 in60 mm of precipitation in a typical August.
- Record high
- 115°46° (1947)
- Record low
- 36°2° (1911)
- Heating degree days
- 15
- Cooling degree days
- 266
Okaton in September
Highs average 77°25° and lows 51°11°, with 1.5 in38 mm of precipitation in a typical September.
- Record high
- 108°42° (1931)
- Record low
- 17°−8° (1926)
- Heating degree days
- 136
- Cooling degree days
- 102
Okaton in OctoberThis month
Highs average 60°16° and lows 37°3°, with 1.8 in46 mm of precipitation and 1.8 in4.6 cm of snow in a typical October.
- Record high
- 103°39° (1947)
- Record low
- 0°−18° (1911)
- Heating degree days
- 510
- Cooling degree days
- 8
Okaton in November
Highs average 45°7° and lows 25°−4°, with 0.68 in17 mm of precipitation and 6 in14 cm of snow in a typical November.
- Record high
- 88°31° (1912)
- Record low
- −21°−29° (1959)
- Heating degree days
- 900
- Cooling degree days
- 0
Okaton in December
Highs average 33°1° and lows 15°−9°, with 0.59 in15 mm of precipitation and 11 in27 cm of snow in a typical December.
- Record high
- 75°24° (1941)
- Record low
- −29°−34° (1916)
- Heating degree days
- 1266
- Cooling degree days
- 0