Blue River weather by month
What a typical year looks like in Blue River, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Boscobel Airport, 9 km from Blue River; records cover 1999–2026.
The year at a glance
- Precipitation a year
- 33.9 in862 mm
- Snow a year
- Rare
- Last spring freeze
- May 5
- First fall freeze
- Oct 5
- Heating degree days
- 6,879
- Cooling degree days
- 738
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Blue River in January
Highs average 29°−2° and lows 10°−12°, with 0.98 in25 mm of precipitation in a typical January.
- Record high
- 61°16° (2025)
- Record low
- −36°−38° (2019)
- Heating degree days
- 1412
- Cooling degree days
- 0
Blue River in February
Highs average 34°1° and lows 14°−10°, with 0.96 in24 mm of precipitation in a typical February.
- Record high
- 74°23° (2024)
- Record low
- −25°−32° (2011)
- Heating degree days
- 1155
- Cooling degree days
- 0
Blue River in March
Highs average 47°8° and lows 25°−4°, with 1.9 in49 mm of precipitation in a typical March.
- Record high
- 85°29° (2007)
- Record low
- −19°−28° (2014)
- Heating degree days
- 901
- Cooling degree days
- 2
Blue River in April
Highs average 61°16° and lows 36°2°, with 3.6 in92 mm of precipitation in a typical April.
- Record high
- 91°33° (2007)
- Record low
- 11°−12° (2018)
- Heating degree days
- 508
- Cooling degree days
- 4
Blue River in May
Highs average 72°22° and lows 47°8°, with 4.4 in110 mm of precipitation in a typical May.
- Record high
- 98°37° (2018)
- Record low
- 22°−6° (2005)
- Heating degree days
- 212
- Cooling degree days
- 43
Blue River in June
Highs average 81°27° and lows 57°14°, with 5.2 in131 mm of precipitation in a typical June.
- Record high
- 98°37° (2011)
- Record low
- 37°3° (2003)
- Heating degree days
- 34
- Cooling degree days
- 155
Blue River in July
Highs average 84°29° and lows 61°16°, with 3.8 in98 mm of precipitation in a typical July.
- Record high
- 105°41° (2012)
- Record low
- 41°5° (2001)
- Heating degree days
- 6
- Cooling degree days
- 248
Blue River in August
Highs average 83°28° and lows 59°15°, with 4.1 in103 mm of precipitation in a typical August.
- Record high
- 105°41° (2023)
- Record low
- 39°4° (2004)
- Heating degree days
- 12
- Cooling degree days
- 204
Blue River in September
Highs average 76°24° and lows 51°10°, with 3.4 in86 mm of precipitation in a typical September.
- Record high
- 100°38° (2023)
- Record low
- 28°−2° (2012)
- Heating degree days
- 128
- Cooling degree days
- 74
Blue River in OctoberThis month
Highs average 63°17° and lows 38°3°, with 2.5 in63 mm of precipitation in a typical October.
- Record high
- 91°33° (2010)
- Record low
- 19°−7° (1999)
- Heating degree days
- 461
- Cooling degree days
- 8
Blue River in November
Highs average 47°8° and lows 28°−2°, with 1.9 in47 mm of precipitation in a typical November.
- Record high
- 77°25° (2020)
- Record low
- −2°−19° (2014)
- Heating degree days
- 830
- Cooling degree days
- 0
Blue River in December
Highs average 34°1° and lows 17°−8°, with 1.3 in34 mm of precipitation in a typical December.
- Record high
- 72°22° (2021)
- Record low
- −29°−34° (2000)
- Heating degree days
- 1220
- Cooling degree days
- 0