Trimountain, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trimountain, a community in Houghton County, Michigan.
This Afternoon
66°F
Rain Showers
Rain showers. Cloudy. High near 66, with temperatures falling to around 62 in the afternoon. South wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Trimountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Rain Showers | 5 mph S | 94% |
| Tonight | 54°F | Rain Showers | 5 mph E | 88% |
| Wednesday | 62°F | Rain Showers | 5 to 10 mph SE | 95% |
| Wednesday Night | 44°F | Rain Showers | 5 to 10 mph SW | 96% |
| Thursday | 44°F | Rain Showers | 10 to 15 mph N | 98% |
| Thursday Night | 31°F | Rain Showers then Cloudy | 10 to 15 mph NE | 79% |
| Friday | 40°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Friday Night | 28°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Saturday | 45°F | Mostly Sunny | 5 mph SW | 1% |
| Saturday Night | 33°F | Mostly Cloudy | 5 to 10 mph W | 11% |
| Sunday | 48°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 | 50°F | Partly Sunny | 10 to 15 mph SW | 2% |
| Monday Night | 37°F | Mostly Cloudy | 15 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Trimountain (47.056, -88.659). Updated through the day.
Growing snapshot for Trimountain
Last spring frost
Jun 1
First fall frost
Sep 23
Growing season
115 days
Hardiness zone
5a
More local growing data for Trimountain: nearby ZIP 49963 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Atlantic Mine
Calumet
Chassell
Dodgeville
Dollar Bay
Fulton
Hancock
Houghton
Hubbell
Hurontown
Lake Linden
Laurium
Mohawk
Painesdale
Pelkie
South Range
Climate data from the nearest NOAA station, Jacobsville, Mi (10.2 mi from Trimountain). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.