Portage weather by month
What a typical year looks like in Portage, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Kalamazoo Battle Creek International Airport, 5 km from Portage; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 33.2 in844 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 16
- Heating degree days
- 6,325
- Cooling degree days
- 709
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −1°−18° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Portage in January
Highs average 32°0° and lows 18°−8°, with 1.7 in43 mm of precipitation in a typical January.
- Record high
- 62°17° (2008)
- Record low
- −18°−28° (2019)
- Heating degree days
- 1246
- Cooling degree days
- 0
Portage in February
Highs average 35°2° and lows 20°−7°, with 1.3 in34 mm of precipitation in a typical February.
- Record high
- 74°23° (2024)
- Record low
- −15°−26° (2015)
- Heating degree days
- 1061
- Cooling degree days
- 0
Portage in March
Highs average 46°8° and lows 27°−3°, with 2 in51 mm of precipitation in a typical March.
- Record high
- 85°29° (2012)
- Record low
- −6°−21° (2014)
- Heating degree days
- 882
- Cooling degree days
- 1
Portage in April
Highs average 59°15° and lows 38°3°, with 3.1 in78 mm of precipitation in a typical April.
- Record high
- 86°30° (2002)
- Record low
- 18°−8° (2018)
- Heating degree days
- 499
- Cooling degree days
- 4
Portage in May
Highs average 70°21° and lows 49°9°, with 3.7 in94 mm of precipitation in a typical May.
- Record high
- 96°36° (2018)
- Record low
- 24°−4° (2020)
- Heating degree days
- 214
- Cooling degree days
- 44
Portage in June
Highs average 80°26° and lows 58°15°, with 3.2 in81 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 35°2° (2003)
- Heating degree days
- 39
- Cooling degree days
- 153
Portage in July
Highs average 83°28° and lows 62°17°, with 3.4 in85 mm of precipitation in a typical July.
- Record high
- 104°40° (2012)
- Record low
- 39°4° (2001)
- Heating degree days
- 6
- Cooling degree days
- 240
Portage in August
Highs average 81°27° and lows 60°16°, with 3.7 in93 mm of precipitation in a typical August.
- Record high
- 96°36° (2024)
- Record low
- 43°6° (2014)
- Heating degree days
- 12
- Cooling degree days
- 190
Portage in September
Highs average 74°23° and lows 53°11°, with 3.3 in83 mm of precipitation in a typical September.
- Record high
- 95°35° (2017)
- Record low
- 33°1° (2020)
- Heating degree days
- 120
- Cooling degree days
- 69
Portage in OctoberThis month
Highs average 61°16° and lows 42°5°, with 3.7 in95 mm of precipitation in a typical October.
- Record high
- 87°31° (2025)
- Record low
- 25°−4° (2008)
- Heating degree days
- 424
- Cooling degree days
- 8
Portage in November
Highs average 48°9° and lows 33°0°, with 2.5 in64 mm of precipitation in a typical November.
- Record high
- 77°25° (2016)
- Record low
- 11°−12° (2019)
- Heating degree days
- 748
- Cooling degree days
- 0
Portage in December
Highs average 37°3° and lows 24°−4°, with 1.7 in43 mm of precipitation in a typical December.
- Record high
- 69°21° (2001)
- Record low
- −11°−24° (2017)
- Heating degree days
- 1074
- Cooling degree days
- 0