St. Helen, MI Weather & Growing Conditions
Today
85°F
Sunny
Sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 5 to 10 mph SW | 0% |
| Tonight | 59°F | Partly Cloudy then Chance Showers And Thunderstorms | 0 to 10 mph SW | 31% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph SW | 59% |
| Wednesday Night | 54°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 56% |
| Thursday | 78°F | Rain Showers Likely | 0 to 5 mph E | 56% |
| Thursday Night | 53°F | Slight Chance Rain Showers then Mostly Clear | 0 to 5 mph S | 18% |
| Friday | 83°F | Sunny | 0 to 5 mph SW | 4% |
| Friday Night | 57°F | Mostly Clear | 0 to 5 mph SW | 4% |
| Saturday | 84°F | Sunny | 0 to 10 mph SW | 14% |
| Saturday Night | 60°F | Chance Showers And Thunderstorms | 0 to 10 mph SW | 39% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 39% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 0 to 10 mph W | 52% |
| Monday | 81°F | Chance Rain Showers | 0 to 10 mph W | 52% |
| Monday Night | 56°F | Chance Rain Showers | 0 to 5 mph NW | 41% |
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 Aug 4, 2026.