Trimountain, MI Weather & Growing Conditions
Tonight
54°F
Rain Showers
Rain showers before 2am, then rain showers and patchy fog. Cloudy. Low around 54, with temperatures rising to around 57 overnight. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Rain Showers | 5 mph E | 89% |
| Wednesday | 63°F | Rain Showers | 5 mph SE | 94% |
| Wednesday Night | 44°F | Rain Showers | 5 to 10 mph SW | 95% |
| Thursday | 45°F | Rain Showers | 10 to 15 mph N | 98% |
| Thursday Night | 31°F | Rain Showers then Cloudy | 10 to 15 mph NE | 81% |
| Friday | 40°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Friday Night | 28°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Saturday | 46°F | Mostly Sunny | 5 mph SW | 1% |
| Saturday Night | 34°F | Mostly Cloudy | 5 to 10 mph W | 10% |
| Sunday | 49°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph W | 15% |
| Sunday Night | 35°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph W | 15% |
| Monday | 51°F | Partly Sunny | 10 to 15 mph SW | 2% |
| Monday Night | 37°F | Mostly Cloudy | 10 to 15 mph W | 9% |
| Tuesday | 47°F | Mostly Sunny | 10 to 15 mph W | 9% |
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 Nov 4, 2026.