Pentwater weather by month
What a typical year looks like in Pentwater, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Hart 3 Wsw, 12 km from Pentwater; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 38.9 in988 mm
- Snow a year
- 79 in199 cm
- Last spring freeze
- May 13
- First fall freeze
- Oct 8
- Heating degree days
- 7,208
- Cooling degree days
- 414
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −2°−19° (heating, 99%) and 89°32° (cooling, 1%).
Month by month
Pentwater in January
Highs average 30°−1° and lows 16°−9°, with 2.8 in70 mm of precipitation and 26 in67 cm of snow in a typical January.
- Record high
- 59°15° (1950)
- Record low
- −26°−32° (1912)
- Heating degree days
- 1306
- Cooling degree days
- 0
Pentwater in February
Highs average 32°0° and lows 16°−9°, with 2 in50 mm of precipitation and 20 in51 cm of snow in a typical February.
- Record high
- 65°18° (1999)
- Record low
- −35°−37° (1899)
- Heating degree days
- 1145
- Cooling degree days
- 0
Pentwater in March
Highs average 42°6° and lows 23°−5°, with 2.4 in60 mm of precipitation and 6 in15 cm of snow in a typical March.
- Record high
- 82°28° (2012)
- Record low
- −16°−27° (1912)
- Heating degree days
- 1011
- Cooling degree days
- 0
Pentwater in April
Highs average 55°13° and lows 33°1°, with 3.6 in92 mm of precipitation and 1.1 in2.8 cm of snow in a typical April.
- Record high
- 86°30° (1901)
- Record low
- 1°−17° (1982)
- Heating degree days
- 636
- Cooling degree days
- 0
Pentwater in May
Highs average 67°19° and lows 43°6°, with 4.5 in113 mm of precipitation in a typical May.
- Record high
- 95°35° (2018)
- Record low
- 19°−7° (1926)
- Heating degree days
- 333
- Cooling degree days
- 19
Pentwater in June
Highs average 76°24° and lows 54°12°, with 3.7 in94 mm of precipitation in a typical June.
- Record high
- 99°37° (1931)
- Record low
- 26°−3° (1946)
- Heating degree days
- 84
- Cooling degree days
- 80
Pentwater in July
Highs average 80°27° and lows 58°14°, with 3.5 in90 mm of precipitation in a typical July.
- Record high
- 104°40° (1911)
- Record low
- 35°2° (1898)
- Heating degree days
- 30
- Cooling degree days
- 147
Pentwater in August
Highs average 79°26° and lows 57°14°, with 3.3 in83 mm of precipitation in a typical August.
- Record high
- 102°39° (1947)
- Record low
- 34°1° (1941)
- Heating degree days
- 39
- Cooling degree days
- 119
Pentwater in September
Highs average 72°22° and lows 50°10°, with 3.2 in82 mm of precipitation in a typical September.
- Record high
- 97°36° (1953)
- Record low
- 25°−4° (1893)
- Heating degree days
- 172
- Cooling degree days
- 46
Pentwater in OctoberThis month
Highs average 59°15° and lows 39°4°, with 4 in101 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 87°31° (1951)
- Record low
- 18°−8° (1895)
- Heating degree days
- 500
- Cooling degree days
- 3
Pentwater in November
Highs average 45°7° and lows 30°−1°, with 3.4 in87 mm of precipitation and 5 in14 cm of snow in a typical November.
- Record high
- 75°24° (1911)
- Record low
- −18°−28° (1950)
- Heating degree days
- 818
- Cooling degree days
- 0
Pentwater in December
Highs average 35°1° and lows 22°−5°, with 2.6 in66 mm of precipitation and 20 in50 cm of snow in a typical December.
- Record high
- 68°20° (1982)
- Record low
- −19°−28° (1935)
- Heating degree days
- 1134
- Cooling degree days
- 0