Chelsea weather by month
What a typical year looks like in Chelsea, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Ann Arbor Municipal Airport, 25 km from Chelsea; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 29.8 in756 mm
- Snow a year
- Rare
- Last spring freeze
- May 13
- First fall freeze
- Oct 1
- Heating degree days
- 6,743
- Cooling degree days
- 520
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 92°33° (cooling, 1%).
Month by month
Chelsea in January
Highs average 32°0° and lows 15°−9°, with 1.7 in43 mm of precipitation in a typical January.
- Record high
- 63°17° (2008)
- Record low
- −21°−29° (2026)
- Heating degree days
- 1286
- Cooling degree days
- 0
Chelsea in February
Highs average 35°1° and lows 16°−9°, with 1.5 in38 mm of precipitation in a typical February.
- Record high
- 73°23° (2024)
- Record low
- −30°−34° (2015)
- Heating degree days
- 1112
- Cooling degree days
- 0
Chelsea in March
Highs average 45°7° and lows 25°−4°, with 2 in50 mm of precipitation in a typical March.
- Record high
- 86°30° (2012)
- Record low
- −14°−26° (2015)
- Heating degree days
- 920
- Cooling degree days
- 0
Chelsea in April
Highs average 59°15° and lows 35°2°, with 3 in77 mm of precipitation in a typical April.
- Record high
- 85°29° (2002)
- Record low
- 15°−9° (2014)
- Heating degree days
- 542
- Cooling degree days
- 2
Chelsea in May
Highs average 70°21° and lows 46°8°, with 3.4 in85 mm of precipitation in a typical May.
- Record high
- 93°34° (2012)
- Record low
- 21°−6° (2005)
- Heating degree days
- 249
- Cooling degree days
- 28
Chelsea in June
Highs average 79°26° and lows 54°12°, with 3.6 in92 mm of precipitation in a typical June.
- Record high
- 102°39° (2012)
- Record low
- 34°1° (2009)
- Heating degree days
- 59
- Cooling degree days
- 102
Chelsea in July
Highs average 84°29° and lows 57°14°, with 3.2 in81 mm of precipitation in a typical July.
- Record high
- 102°39° (2012)
- Record low
- 37°3° (2001)
- Heating degree days
- 15
- Cooling degree days
- 186
Chelsea in August
Highs average 81°27° and lows 57°14°, with 2.7 in68 mm of precipitation in a typical August.
- Record high
- 96°36° (2012)
- Record low
- 38°3° (2009)
- Heating degree days
- 22
- Cooling degree days
- 150
Chelsea in September
Highs average 74°23° and lows 48°9°, with 2.8 in70 mm of precipitation in a typical September.
- Record high
- 95°35° (2011)
- Record low
- 28°−2° (1999)
- Heating degree days
- 157
- Cooling degree days
- 46
Chelsea in OctoberThis month
Highs average 62°16° and lows 38°3°, with 2.2 in56 mm of precipitation in a typical October.
- Record high
- 89°32° (2007)
- Record low
- 17°−8° (2008)
- Heating degree days
- 474
- Cooling degree days
- 6
Chelsea in November
Highs average 48°9° and lows 30°−1°, with 2.1 in53 mm of precipitation in a typical November.
- Record high
- 77°25° (2016)
- Record low
- −6°−21° (2019)
- Heating degree days
- 789
- Cooling degree days
- 0
Chelsea in December
Highs average 36°2° and lows 22°−6°, with 1.7 in43 mm of precipitation in a typical December.
- Record high
- 68°20° (1998)
- Record low
- −20°−29° (2017)
- Heating degree days
- 1118
- Cooling degree days
- 0