St. Helen weather by month
What a typical year looks like in St. Helen, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Houghton Lake Roscommon County Airport, 21 km from St. Helen; records cover 1913–2026.
The year at a glance
- Precipitation a year
- 29.6 in752 mm
- Snow a year
- 66 in167 cm
- Last spring freeze
- May 18
- First fall freeze
- Sep 22
- Heating degree days
- 7,898
- Cooling degree days
- 337
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −11°−24° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
St. Helen in January
Highs average 27°−3° and lows 11°−11°, with 1.7 in43 mm of precipitation and 16 in42 cm of snow in a typical January.
- Record high
- 58°14° (1914)
- Record low
- −32°−36° (1951)
- Heating degree days
- 1421
- Cooling degree days
- 0
St. Helen in February
Highs average 30°−1° and lows 11°−12°, with 1.4 in36 mm of precipitation and 14 in35 cm of snow in a typical February.
- Record high
- 69°21° (2024)
- Record low
- −48°−44° (1918)
- Heating degree days
- 1252
- Cooling degree days
- 0
St. Helen in March
Highs average 40°5° and lows 19°−7°, with 1.8 in45 mm of precipitation and 8 in21 cm of snow in a typical March.
- Record high
- 85°29° (2012)
- Record low
- −25°−32° (1943)
- Heating degree days
- 1093
- Cooling degree days
- 0
St. Helen in April
Highs average 54°12° and lows 31°−1°, with 3.1 in79 mm of precipitation and 4 in11 cm of snow in a typical April.
- Record high
- 89°32° (1925)
- Record low
- −15°−26° (1923)
- Heating degree days
- 683
- Cooling degree days
- 1
St. Helen in May
Highs average 67°20° and lows 42°6°, with 3.2 in80 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 96°36° (1921)
- Record low
- 12°−11° (1926)
- Heating degree days
- 338
- Cooling degree days
- 20
St. Helen in June
Highs average 77°25° and lows 51°11°, with 3.2 in82 mm of precipitation in a typical June.
- Record high
- 107°42° (1934)
- Record low
- 23°−5° (1921)
- Heating degree days
- 102
- Cooling degree days
- 69
St. Helen in July
Highs average 81°27° and lows 55°13°, with 2.7 in70 mm of precipitation in a typical July.
- Record high
- 107°42° (1936)
- Record low
- 26°−3° (1919)
- Heating degree days
- 41
- Cooling degree days
- 126
St. Helen in August
Highs average 78°26° and lows 53°12°, with 2.9 in73 mm of precipitation in a typical August.
- Record high
- 100°38° (1918)
- Record low
- 27°−3° (1927)
- Heating degree days
- 66
- Cooling degree days
- 91
St. Helen in September
Highs average 71°21° and lows 46°8°, with 2.6 in66 mm of precipitation in a typical September.
- Record high
- 100°38° (1931)
- Record low
- 19°−7° (1918)
- Heating degree days
- 227
- Cooling degree days
- 28
St. Helen in OctoberThis month
Highs average 57°14° and lows 37°3°, with 3.1 in78 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 88°31° (1922)
- Record low
- 7°−14° (1925)
- Heating degree days
- 567
- Cooling degree days
- 2
St. Helen in November
Highs average 43°6° and lows 28°−2°, with 2.2 in56 mm of precipitation and 8 in19 cm of snow in a typical November.
- Record high
- 77°25° (1927)
- Record low
- −14°−26° (1950)
- Heating degree days
- 885
- Cooling degree days
- 0
St. Helen in December
Highs average 32°0° and lows 19°−7°, with 1.8 in45 mm of precipitation and 15 in38 cm of snow in a typical December.
- Record high
- 64°18° (2001)
- Record low
- −28°−33° (1926)
- Heating degree days
- 1223
- Cooling degree days
- 0