Somerset weather by month
What a typical year looks like in Somerset, Wisconsin: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Stillwater 2sw, 17 km from Somerset; records cover 2006–2026.
The year at a glance
- Precipitation a year
- 33.2 in843 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 23
- First fall freeze
- Oct 13
- Heating degree days
- 8,008
- Cooling degree days
- 512
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −17°−27° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Somerset in January
Highs average 22°−5° and lows 5°−15°, with 0.85 in22 mm of precipitation in a typical January.
- Record high
- 54°12° (2012)
- Record low
- −34°−37° (2019)
- Heating degree days
- 1592
- Cooling degree days
- 0
Somerset in February
Highs average 28°−2° and lows 8°−13°, with 0.92 in23 mm of precipitation in a typical February.
- Record high
- 64°18° (2024)
- Record low
- −34°−37° (2019)
- Heating degree days
- 1323
- Cooling degree days
- 0
Somerset in March
Highs average 41°5° and lows 20°−7°, with 1.6 in41 mm of precipitation in a typical March.
- Record high
- 80°27° (2007)
- Record low
- −19°−28° (2014)
- Heating degree days
- 1074
- Cooling degree days
- 0
Somerset in April
Highs average 55°13° and lows 34°1°, with 3 in75 mm of precipitation in a typical April.
- Record high
- 87°31° (2023)
- Record low
- 4°−16° (2018)
- Heating degree days
- 616
- Cooling degree days
- 1
Somerset in May
Highs average 67°20° and lows 47°8°, with 4.2 in106 mm of precipitation in a typical May.
- Record high
- 97°36° (2018)
- Record low
- 28°−2° (2011)
- Heating degree days
- 270
- Cooling degree days
- 24
Somerset in June
Highs average 76°24° and lows 58°14°, with 4.8 in122 mm of precipitation in a typical June.
- Record high
- 99°37° (2011)
- Record low
- 40°4° (2021)
- Heating degree days
- 49
- Cooling degree days
- 99
Somerset in July
Highs average 79°26° and lows 62°17°, with 4.4 in111 mm of precipitation in a typical July.
- Record high
- 97°36° (2012)
- Record low
- 50°10° (2015)
- Heating degree days
- 10
- Cooling degree days
- 190
Somerset in August
Highs average 78°25° and lows 60°16°, with 4.4 in112 mm of precipitation in a typical August.
- Record high
- 95°35° (2023)
- Record low
- 46°8° (2009)
- Heating degree days
- 21
- Cooling degree days
- 146
Somerset in September
Highs average 71°22° and lows 51°11°, with 3.3 in84 mm of precipitation in a typical September.
- Record high
- 96°36° (2023)
- Record low
- 33°1° (2007)
- Heating degree days
- 169
- Cooling degree days
- 48
Somerset in OctoberThis month
Highs average 58°14° and lows 38°3°, with 2.7 in70 mm of precipitation in a typical October.
- Record high
- 90°32° (2023)
- Record low
- 15°−9° (2020)
- Heating degree days
- 536
- Cooling degree days
- 4
Somerset in November
Highs average 41°5° and lows 25°−4°, with 1.8 in46 mm of precipitation in a typical November.
- Record high
- 75°24° (2008)
- Record low
- −3°−19° (2014)
- Heating degree days
- 953
- Cooling degree days
- 0
Somerset in December
Highs average 28°−2° and lows 13°−11°, with 1.2 in31 mm of precipitation in a typical December.
- Record high
- 57°14° (2021)
- Record low
- −21°−29° (2016)
- Heating degree days
- 1395
- Cooling degree days
- 0