Marty weather by month
What a typical year looks like in Marty, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Pickstown 4ssw, 11 km from Marty; records cover 2017–2026.
The year at a glance
- Precipitation a year
- 26.1 in662 mm
- Snow a year
- Rare
- Last spring freeze
- Rare
- First fall freeze
- Rare
- Heating degree days
- 6,991
- Cooling degree days
- 818
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −8°−22° (heating, 99%) and 96°35° (cooling, 1%).
Month by month
Marty in January
Highs average 30°−1° and lows 10°−12°, with 0.61 in15 mm of precipitation in a typical January.
- Record high
- 63°17° (2026)
- Record low
- −22°−30° (2018)
- Heating degree days
- 1396
- Cooling degree days
- 0
Marty in February
Highs average 35°2° and lows 14°−10°, with 0.75 in19 mm of precipitation in a typical February.
- Record high
- 72°22° (2026)
- Record low
- −21°−29° (2021)
- Heating degree days
- 1142
- Cooling degree days
- 0
Marty in March
Highs average 47°8° and lows 23°−5°, with 1.3 in33 mm of precipitation in a typical March.
- Record high
- 89°32° (2026)
- Record low
- −14°−26° (2019)
- Heating degree days
- 932
- Cooling degree days
- 0
Marty in April
Highs average 58°14° and lows 35°2°, with 2.9 in72 mm of precipitation in a typical April.
- Record high
- 94°34° (2022)
- Record low
- 7°−14° (2018)
- Heating degree days
- 553
- Cooling degree days
- 1
Marty in May
Highs average 69°21° and lows 48°9°, with 3.9 in99 mm of precipitation in a typical May.
- Record high
- 93°34° (2018)
- Record low
- 31°−1° (2020)
- Heating degree days
- 243
- Cooling degree days
- 34
Marty in June
Highs average 80°27° and lows 58°15°, with 4 in101 mm of precipitation in a typical June.
- Record high
- 105°41° (2021)
- Record low
- 44°7° (2017)
- Heating degree days
- 26
- Cooling degree days
- 148
Marty in July
Highs average 86°30° and lows 64°18°, with 3.1 in78 mm of precipitation in a typical July.
- Record high
- 108°42° (2026)
- Record low
- 54°12° (2023)
- Heating degree days
- 0
- Cooling degree days
- 314
Marty in August
Highs average 83°29° and lows 61°16°, with 3.2 in82 mm of precipitation in a typical August.
- Record high
- 108°42° (2022)
- Record low
- 46°8° (2025)
- Heating degree days
- 5
- Cooling degree days
- 233
Marty in September
Highs average 76°25° and lows 52°11°, with 2.7 in68 mm of precipitation in a typical September.
- Record high
- 105°41° (2023)
- Record low
- 37°3° (2025)
- Heating degree days
- 109
- Cooling degree days
- 77
Marty in OctoberThis month
Highs average 62°17° and lows 38°3°, with 2.1 in53 mm of precipitation in a typical October.
- Record high
- 94°34° (2025)
- Record low
- 9°−13° (2020)
- Heating degree days
- 478
- Cooling degree days
- 8
Marty in November
Highs average 47°8° and lows 25°−4°, with 0.85 in22 mm of precipitation in a typical November.
- Record high
- 85°29° (2025)
- Record low
- 3°−16° (2019)
- Heating degree days
- 871
- Cooling degree days
- 3
Marty in December
Highs average 35°2° and lows 16°−9°, with 0.78 in20 mm of precipitation in a typical December.
- Record high
- 68°20° (2021)
- Record low
- −19°−28° (2022)
- Heating degree days
- 1236
- Cooling degree days
- 0