Agar weather by month
What a typical year looks like in Agar, South Dakota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Onida 4 NW, 13 km from Agar; records cover 1921–2026.
The year at a glance
- Precipitation a year
- 21.1 in535 mm
- Snow a year
- 49 in124 cm
- Last spring freeze
- May 12
- First fall freeze
- Sep 29
- Heating degree days
- 7,660
- Cooling degree days
- 781
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −16°−27° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Agar in January
Highs average 27°−3° and lows 7°−14°, with 0.54 in14 mm of precipitation and 7 in19 cm of snow in a typical January.
- Record high
- 63°17° (2012)
- Record low
- −40° (2018)
- Heating degree days
- 1489
- Cooling degree days
- 0
Agar in February
Highs average 31°−1° and lows 11°−12°, with 0.79 in20 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 71°22° (1958)
- Record low
- −38°−39° (1994)
- Heating degree days
- 1233
- Cooling degree days
- 0
Agar in March
Highs average 44°7° and lows 22°−5°, with 0.97 in25 mm of precipitation and 8 in20 cm of snow in a typical March.
- Record high
- 86°30° (2012)
- Record low
- −24°−31° (1960)
- Heating degree days
- 984
- Cooling degree days
- 0
Agar in April
Highs average 58°14° and lows 33°1°, with 2 in50 mm of precipitation and 7 in17 cm of snow in a typical April.
- Record high
- 98°37° (1980)
- Record low
- −3°−19° (1936)
- Heating degree days
- 587
- Cooling degree days
- 2
Agar in May
Highs average 69°21° and lows 45°7°, with 3.2 in81 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 103°39° (1934)
- Record low
- 17°−8° (2005)
- Heating degree days
- 272
- Cooling degree days
- 27
Agar in June
Highs average 80°26° and lows 56°13°, with 3.6 in92 mm of precipitation in a typical June.
- Record high
- 112°44° (1931)
- Record low
- 32°0° (1946)
- Heating degree days
- 55
- Cooling degree days
- 132
Agar in July
Highs average 87°31° and lows 61°16°, with 2.5 in64 mm of precipitation in a typical July.
- Record high
- 116°47° (2006)
- Record low
- 38°3° (1971)
- Heating degree days
- 8
- Cooling degree days
- 298
Agar in August
Highs average 85°30° and lows 59°15°, with 2.5 in64 mm of precipitation in a typical August.
- Record high
- 112°44° (1937)
- Record low
- 33°1° (1929)
- Heating degree days
- 17
- Cooling degree days
- 235
Agar in September
Highs average 77°25° and lows 49°10°, with 1.8 in45 mm of precipitation in a typical September.
- Record high
- 108°42° (1931)
- Record low
- 13°−11° (1926)
- Heating degree days
- 143
- Cooling degree days
- 82
Agar in OctoberThis month
Highs average 60°15° and lows 36°2°, with 1.9 in49 mm of precipitation and 3 in8 cm of snow in a typical October.
- Record high
- 95°35° (1922)
- Record low
- −2°−19° (1925)
- Heating degree days
- 538
- Cooling degree days
- 5
Agar in November
Highs average 43°6° and lows 23°−5°, with 0.68 in17 mm of precipitation and 7 in17 cm of snow in a typical November.
- Record high
- 81°27° (1999)
- Record low
- −21°−29° (1940)
- Heating degree days
- 962
- Cooling degree days
- 0
Agar in December
Highs average 30°−1° and lows 12°−11°, with 0.59 in15 mm of precipitation and 8 in20 cm of snow in a typical December.
- Record high
- 73°23° (1941)
- Record low
- −32°−36° (1990)
- Heating degree days
- 1372
- Cooling degree days
- 0