Colby weather by month
What a typical year looks like in Colby, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Medford, 25 km from Colby; records cover 1893–2025.
The year at a glance
- Precipitation a year
- 34.2 in869 mm
- Snow a year
- 57 in145 cm
- Last spring freeze
- May 13
- First fall freeze
- Sep 30
- Heating degree days
- 8,763
- Cooling degree days
- 335
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −20°−29° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Colby in January
Highs average 21°−6° and lows 2°−16°, with 1.1 in28 mm of precipitation and 13 in33 cm of snow in a typical January.
- Record high
- 52°11° (1897)
- Record low
- −40° (1912)
- Heating degree days
- 1660
- Cooling degree days
- 0
Colby in February
Highs average 26°−3° and lows 6°−15°, with 1.1 in28 mm of precipitation and 14 in35 cm of snow in a typical February.
- Record high
- 60°16° (1896)
- Record low
- −45°−43° (1899)
- Heating degree days
- 1380
- Cooling degree days
- 0
Colby in March
Highs average 38°3° and lows 18°−8°, with 1.7 in42 mm of precipitation and 6 in15 cm of snow in a typical March.
- Record high
- 78°26° (1910)
- Record low
- −40° (1962)
- Heating degree days
- 1147
- Cooling degree days
- 0
Colby in April
Highs average 52°11° and lows 31°−1°, with 3 in76 mm of precipitation and 4 in10 cm of snow in a typical April.
- Record high
- 89°32° (1952)
- Record low
- −4°−20° (1923)
- Heating degree days
- 707
- Cooling degree days
- 0
Colby in May
Highs average 66°19° and lows 43°6°, with 3.7 in93 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 101°38° (1934)
- Record low
- 16°−9° (1900)
- Heating degree days
- 340
- Cooling degree days
- 16
Colby in June
Highs average 75°24° and lows 53°12°, with 4.8 in123 mm of precipitation in a typical June.
- Record high
- 103°39° (1900)
- Record low
- 22°−6° (1910)
- Heating degree days
- 97
- Cooling degree days
- 69
Colby in July
Highs average 79°26° and lows 57°14°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 104°40° (1936)
- Record low
- 34°1° (1899)
- Heating degree days
- 35
- Cooling degree days
- 128
Colby in August
Highs average 77°25° and lows 55°13°, with 4.3 in109 mm of precipitation in a typical August.
- Record high
- 100°38° (1896)
- Record low
- 30°−1° (1931)
- Heating degree days
- 54
- Cooling degree days
- 90
Colby in September
Highs average 69°21° and lows 47°8°, with 3.9 in99 mm of precipitation in a typical September.
- Record high
- 99°37° (1898)
- Record low
- 11°−12° (1899)
- Heating degree days
- 233
- Cooling degree days
- 30
Colby in OctoberThis month
Highs average 55°13° and lows 35°1°, with 3.3 in83 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 89°32° (1976)
- Record low
- 2°−17° (1925)
- Heating degree days
- 632
- Cooling degree days
- 2
Colby in November
Highs average 39°4° and lows 23°−5°, with 1.9 in49 mm of precipitation and 5 in11 cm of snow in a typical November.
- Record high
- 73°23° (1893)
- Record low
- −19°−28° (1976)
- Heating degree days
- 1024
- Cooling degree days
- 0
Colby in December
Highs average 26°−3° and lows 10°−12°, with 1.4 in36 mm of precipitation and 15 in39 cm of snow in a typical December.
- Record high
- 60°16° (2001)
- Record low
- −31°−35° (1933)
- Heating degree days
- 1454
- Cooling degree days
- 0