Humboldt weather by month
What a typical year looks like in Humboldt, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Salem 5ne, 22 km from Humboldt; records cover 2005–2026.
The year at a glance
- Precipitation a year
- 27 in685 mm
- Snow a year
- Rare
- Last spring freeze
- May 12
- First fall freeze
- Oct 4
- Heating degree days
- 8,052
- Cooling degree days
- 588
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −15°−26° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Humboldt in January
Highs average 24°−5° and lows 5°−15°, with 0.55 in14 mm of precipitation in a typical January.
- Record high
- 61°16° (2012)
- Record low
- −32°−36° (2009)
- Heating degree days
- 1571
- Cooling degree days
- 0
Humboldt in February
Highs average 29°−2° and lows 9°−13°, with 0.74 in19 mm of precipitation in a typical February.
- Record high
- 67°19° (2017)
- Record low
- −28°−33° (2025)
- Heating degree days
- 1286
- Cooling degree days
- 0
Humboldt in March
Highs average 43°6° and lows 21°−6°, with 1.4 in35 mm of precipitation in a typical March.
- Record high
- 87°31° (2026)
- Record low
- −25°−32° (2019)
- Heating degree days
- 1030
- Cooling degree days
- 1
Humboldt in April
Highs average 57°14° and lows 32°0°, with 3.3 in84 mm of precipitation in a typical April.
- Record high
- 92°33° (2012)
- Record low
- 0°−18° (2018)
- Heating degree days
- 625
- Cooling degree days
- 1
Humboldt in May
Highs average 70°21° and lows 45°7°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 99°37° (2018)
- Record low
- 19°−7° (2013)
- Heating degree days
- 276
- Cooling degree days
- 31
Humboldt in June
Highs average 79°26° and lows 56°13°, with 3.9 in100 mm of precipitation in a typical June.
- Record high
- 101°38° (2025)
- Record low
- 40°4° (2022)
- Heating degree days
- 50
- Cooling degree days
- 122
Humboldt in July
Highs average 83°29° and lows 60°16°, with 3 in75 mm of precipitation in a typical July.
- Record high
- 103°39° (2005)
- Record low
- 43°6° (2013)
- Heating degree days
- 10
- Cooling degree days
- 217
Humboldt in August
Highs average 81°27° and lows 58°14°, with 3.4 in85 mm of precipitation in a typical August.
- Record high
- 105°41° (2022)
- Record low
- 40°4° (2015)
- Heating degree days
- 26
- Cooling degree days
- 164
Humboldt in September
Highs average 74°23° and lows 48°9°, with 3 in77 mm of precipitation in a typical September.
- Record high
- 100°38° (2023)
- Record low
- 27°−3° (2012)
- Heating degree days
- 169
- Cooling degree days
- 49
Humboldt in OctoberThis month
Highs average 59°15° and lows 35°1°, with 2.2 in56 mm of precipitation in a typical October.
- Record high
- 92°33° (2023)
- Record low
- 5°−15° (2020)
- Heating degree days
- 572
- Cooling degree days
- 3
Humboldt in November
Highs average 42°6° and lows 21°−6°, with 1.1 in27 mm of precipitation in a typical November.
- Record high
- 81°27° (2020)
- Record low
- −9°−23° (2014)
- Heating degree days
- 1004
- Cooling degree days
- 0
Humboldt in December
Highs average 28°−2° and lows 10°−12°, with 0.67 in17 mm of precipitation in a typical December.
- Record high
- 61°16° (2021)
- Record low
- −30°−34° (2016)
- Heating degree days
- 1433
- Cooling degree days
- 0