Ellison Bay weather by month
What a typical year looks like in Ellison Bay, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Ephraim 1ne-Wwtp, 11 km from Ellison Bay; records cover 2006–2026.
The year at a glance
- Precipitation a year
- 31 in787 mm
- Snow a year
- 62 in156 cm
- Last spring freeze
- May 13
- First fall freeze
- Oct 20
- Heating degree days
- 7,725
- Cooling degree days
- 348
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −9°−23° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Ellison Bay in January
Highs average 27°−3° and lows 12°−11°, with 1.7 in43 mm of precipitation and 17 in43 cm of snow in a typical January.
- Record high
- 54°12° (2012)
- Record low
- −22°−30° (2014)
- Heating degree days
- 1415
- Cooling degree days
- 0
Ellison Bay in February
Highs average 29°−2° and lows 13°−11°, with 1.1 in27 mm of precipitation and 14 in36 cm of snow in a typical February.
- Record high
- 57°14° (2017)
- Record low
- −20°−29° (2014)
- Heating degree days
- 1233
- Cooling degree days
- 0
Ellison Bay in March
Highs average 39°4° and lows 21°−6°, with 1.7 in42 mm of precipitation and 8 in20 cm of snow in a typical March.
- Record high
- 82°28° (2012)
- Record low
- −13°−25° (2014)
- Heating degree days
- 1090
- Cooling degree days
- 0
Ellison Bay in April
Highs average 51°11° and lows 31°0°, with 2.7 in69 mm of precipitation and 6 in16 cm of snow in a typical April.
- Record high
- 80°27° (2010)
- Record low
- 6°−14° (2018)
- Heating degree days
- 718
- Cooling degree days
- 0
Ellison Bay in May
Highs average 65°18° and lows 42°5°, with 3.5 in88 mm of precipitation in a typical May.
- Record high
- 88°31° (2018)
- Record low
- 24°−4° (2020)
- Heating degree days
- 372
- Cooling degree days
- 6
Ellison Bay in June
Highs average 74°23° and lows 53°11°, with 3.3 in84 mm of precipitation in a typical June.
- Record high
- 90°32° (2009)
- Record low
- 33°1° (2019)
- Heating degree days
- 104
- Cooling degree days
- 49
Ellison Bay in July
Highs average 80°26° and lows 58°14°, with 3.1 in77 mm of precipitation in a typical July.
- Record high
- 96°36° (2011)
- Record low
- 41°5° (2015)
- Heating degree days
- 27
- Cooling degree days
- 142
Ellison Bay in August
Highs average 78°26° and lows 57°14°, with 3 in77 mm of precipitation in a typical August.
- Record high
- 91°33° (2007)
- Record low
- 37°3° (2009)
- Heating degree days
- 36
- Cooling degree days
- 112
Ellison Bay in September
Highs average 70°21° and lows 51°11°, with 3.4 in87 mm of precipitation in a typical September.
- Record high
- 90°32° (2007)
- Record low
- 32°0° (2020)
- Heating degree days
- 166
- Cooling degree days
- 38
Ellison Bay in OctoberThis month
Highs average 57°14° and lows 41°5°, with 3.6 in92 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 84°29° (2007)
- Record low
- 23°−5° (2020)
- Heating degree days
- 503
- Cooling degree days
- 1
Ellison Bay in November
Highs average 44°6° and lows 30°−1°, with 2.3 in58 mm of precipitation and 2.5 in6.4 cm of snow in a typical November.
- Record high
- 73°23° (2020)
- Record low
- 7°−14° (2014)
- Heating degree days
- 844
- Cooling degree days
- 0
Ellison Bay in December
Highs average 33°0° and lows 19°−7°, with 1.7 in43 mm of precipitation and 14 in35 cm of snow in a typical December.
- Record high
- 58°14° (2012)
- Record low
- −11°−24° (2013)
- Heating degree days
- 1217
- Cooling degree days
- 0