St. Helen, MI Weather & Growing Conditions
Overnight
61°F
Mostly Cloudy
Mostly cloudy. Low around 61, with temperatures rising to around 63 overnight. South wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Cloudy | 10 mph S | 5% |
| Wednesday | 68°F | Rain Showers Likely | 10 mph S | 71% |
| Wednesday Night | 44°F | Rain Showers Likely | 10 mph SW | 71% |
| Thursday | 53°F | Chance Rain Showers | 10 mph SW | 50% |
| Thursday Night | 34°F | Rain Showers Likely | 5 to 10 mph NW | 72% |
| Friday | 45°F | Rain Showers Likely | 10 mph N | 62% |
| Friday Night | 27°F | Rain And Snow Showers Likely | 5 to 10 mph N | 60% |
| Saturday | 48°F | Chance Snow Showers then Mostly Sunny | 5 mph NW | 28% |
| Saturday Night | 26°F | Partly Cloudy | 0 to 5 mph W | 3% |
| Sunday | 52°F | Mostly Sunny | 5 to 10 mph W | 11% |
| Sunday Night | 29°F | Partly Cloudy | 5 mph W | 11% |
| Monday | 55°F | Mostly Sunny | 5 to 10 mph W | 2% |
| Monday Night | 34°F | Partly Cloudy | 5 mph W | 5% |
| Tuesday | 56°F | Mostly Sunny | 5 to 10 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Helen, MI
Last spring frost
May 19
First fall frost
Sep 23
Growing season
125 days
Hardiness zone
5a
Explore more for St. Helen, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Houghton Lk Roscommon Ap, Mi (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.