Trimountain, MI Weather & Growing Conditions
This Afternoon
62°F
Mostly Cloudy
Mostly cloudy, with a high near 62. East wind around 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Mostly Cloudy | 10 mph E | 0% |
| Tonight | 46°F | Mostly Cloudy | 5 to 10 mph SE | 5% |
| Saturday | 66°F | Mostly Sunny | 5 mph SE | 2% |
| Saturday Night | 49°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Sunday | 61°F | Partly Sunny | 5 to 15 mph NE | 3% |
| Sunday Night | 45°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 5 to 15 mph E | 0% |
| Monday Night | 41°F | Partly Cloudy | 0 to 10 mph E | 0% |
| Tuesday | 61°F | Sunny | 0 to 10 mph E | 0% |
| Tuesday Night | 42°F | Mostly Clear | 0 to 10 mph SE | 0% |
| Wednesday | 65°F | Sunny | 0 to 10 mph SE | 3% |
| Wednesday Night | 45°F | Partly Cloudy | 5 to 10 mph SE | 3% |
| Thursday | 67°F | Mostly Sunny | 5 mph W | 2% |
| Thursday Night | 48°F | Partly Cloudy | 5 mph S | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Trimountain, MI
Last spring frost
Jun 1
First fall frost
Sep 23
Growing season
115 days
Hardiness zone
5a
Explore more for Trimountain, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Jacobsville, Mi (10.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.