De Graff weather by month
What a typical year looks like in De Graff, Minnesota: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Benson, 13 km from De Graff; records cover 1945–2026.
The year at a glance
- Precipitation a year
- 28.1 in714 mm
- Snow a year
- 43 in108 cm
- Last spring freeze
- May 4
- First fall freeze
- Oct 2
- Heating degree days
- 8,381
- Cooling degree days
- 644
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −19°−28° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
De Graff in January
Highs average 21°−6° and lows 1°−17°, with 0.74 in19 mm of precipitation and 8 in21 cm of snow in a typical January.
- Record high
- 63°17° (1981)
- Record low
- −35°−37° (1977)
- Heating degree days
- 1674
- Cooling degree days
- 0
De Graff in February
Highs average 26°−3° and lows 5°−15°, with 0.81 in21 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 61°16° (2016)
- Record low
- −35°−37° (1996)
- Heating degree days
- 1389
- Cooling degree days
- 0
De Graff in March
Highs average 39°4° and lows 18°−8°, with 1.5 in38 mm of precipitation and 7 in18 cm of snow in a typical March.
- Record high
- 80°27° (2012)
- Record low
- −27°−33° (1962)
- Heating degree days
- 1124
- Cooling degree days
- 0
De Graff in April
Highs average 56°13° and lows 33°0°, with 2.6 in66 mm of precipitation and 4 in11 cm of snow in a typical April.
- Record high
- 97°36° (1980)
- Record low
- 0°−18° (1975)
- Heating degree days
- 629
- Cooling degree days
- 2
De Graff in May
Highs average 69°21° and lows 46°8°, with 3.3 in85 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 99°37° (2006)
- Record low
- 20°−7° (1961)
- Heating degree days
- 264
- Cooling degree days
- 36
De Graff in June
Highs average 79°26° and lows 57°14°, with 4.1 in104 mm of precipitation in a typical June.
- Record high
- 104°40° (1988)
- Record low
- 34°1° (1964)
- Heating degree days
- 47
- Cooling degree days
- 141
De Graff in July
Highs average 83°29° and lows 61°16°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 103°39° (1966)
- Record low
- 41°5° (1971)
- Heating degree days
- 10
- Cooling degree days
- 232
De Graff in August
Highs average 81°27° and lows 59°15°, with 3.8 in96 mm of precipitation in a typical August.
- Record high
- 103°39° (1976)
- Record low
- 36°2° (2004)
- Heating degree days
- 23
- Cooling degree days
- 168
De Graff in September
Highs average 74°23° and lows 49°10°, with 2.8 in70 mm of precipitation in a typical September.
- Record high
- 101°38° (2023)
- Record low
- 21°−6° (1965)
- Heating degree days
- 162
- Cooling degree days
- 60
De Graff in OctoberThis month
Highs average 59°15° and lows 35°2°, with 2.5 in62 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 93°34° (1963)
- Record low
- 10°−12° (2020)
- Heating degree days
- 567
- Cooling degree days
- 5
De Graff in November
Highs average 41°5° and lows 22°−6°, with 1.2 in31 mm of precipitation and 6 in14 cm of snow in a typical November.
- Record high
- 81°27° (1999)
- Record low
- −21°−29° (1964)
- Heating degree days
- 1016
- Cooling degree days
- 0
De Graff in December
Highs average 27°−3° and lows 8°−13°, with 0.82 in21 mm of precipitation and 8 in21 cm of snow in a typical December.
- Record high
- 60°16° (1962)
- Record low
- −28°−33° (1955)
- Heating degree days
- 1476
- Cooling degree days
- 0