Petersburg weather by month
What a typical year looks like in Petersburg, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Tecumseh, 22 km from Petersburg; records cover 1994–2026.
The year at a glance
- Precipitation a year
- 36 in915 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 15
- Heating degree days
- 6,581
- Cooling degree days
- 630
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −5°−21° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Petersburg in January
Highs average 33°0° and lows 15°−9°, with 2.4 in60 mm of precipitation in a typical January.
- Record high
- 64°18° (2008)
- Record low
- −19°−28° (2019)
- Heating degree days
- 1279
- Cooling degree days
- 0
Petersburg in February
Highs average 36°2° and lows 16°−9°, with 2.1 in53 mm of precipitation in a typical February.
- Record high
- 70°21° (2017)
- Record low
- −18°−28° (2015)
- Heating degree days
- 1084
- Cooling degree days
- 0
Petersburg in March
Highs average 46°8° and lows 24°−4°, with 2.4 in61 mm of precipitation in a typical March.
- Record high
- 83°28° (2012)
- Record low
- −10°−23° (2014)
- Heating degree days
- 919
- Cooling degree days
- 0
Petersburg in April
Highs average 60°15° and lows 34°1°, with 3.4 in85 mm of precipitation in a typical April.
- Record high
- 87°31° (2002)
- Record low
- 17°−8° (2018)
- Heating degree days
- 550
- Cooling degree days
- 2
Petersburg in May
Highs average 71°22° and lows 45°7°, with 3.7 in93 mm of precipitation in a typical May.
- Record high
- 95°35° (2012)
- Record low
- 25°−4° (2020)
- Heating degree days
- 244
- Cooling degree days
- 28
Petersburg in June
Highs average 81°27° and lows 55°13°, with 3.9 in98 mm of precipitation in a typical June.
- Record high
- 102°39° (2012)
- Record low
- 38°3° (1994)
- Heating degree days
- 42
- Cooling degree days
- 135
Petersburg in July
Highs average 86°30° and lows 59°15°, with 3.6 in90 mm of precipitation in a typical July.
- Record high
- 102°39° (2012)
- Record low
- 40°4° (2014)
- Heating degree days
- 6
- Cooling degree days
- 231
Petersburg in August
Highs average 83°28° and lows 57°14°, with 3.3 in84 mm of precipitation in a typical August.
- Record high
- 97°36° (2020)
- Record low
- 42°6° (2009)
- Heating degree days
- 15
- Cooling degree days
- 168
Petersburg in September
Highs average 76°25° and lows 50°10°, with 3.3 in83 mm of precipitation in a typical September.
- Record high
- 97°36° (2011)
- Record low
- 30°−1° (2009)
- Heating degree days
- 118
- Cooling degree days
- 60
Petersburg in OctoberThis month
Highs average 63°17° and lows 39°4°, with 3 in77 mm of precipitation in a typical October.
- Record high
- 91°33° (2007)
- Record low
- 24°−4° (2005)
- Heating degree days
- 439
- Cooling degree days
- 6
Petersburg in November
Highs average 49°9° and lows 29°−2°, with 2.9 in72 mm of precipitation in a typical November.
- Record high
- 80°27° (2020)
- Record low
- 5°−15° (2019)
- Heating degree days
- 788
- Cooling degree days
- 0
Petersburg in December
Highs average 38°3° and lows 21°−6°, with 2.3 in58 mm of precipitation in a typical December.
- Record high
- 69°21° (2001)
- Record low
- −10°−23° (2017)
- Heating degree days
- 1097
- Cooling degree days
- 0