Trimountain, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trimountain, a community in Houghton County, Michigan.
This Afternoon
62°F
Partly Sunny
Partly sunny. High near 62, with temperatures falling to around 58 in the afternoon. East wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Trimountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Partly Sunny | 10 mph E | 5% |
| Tonight | 44°F | Partly Cloudy | 5 to 10 mph SE | 10% |
| Saturday | 66°F | Sunny | 5 mph E | 6% |
| Saturday Night | 46°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Sunday | 61°F | Partly Sunny | 5 to 15 mph NE | 0% |
| Sunday Night | 43°F | Mostly Cloudy | 10 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 10 to 15 mph E | 0% |
| Monday Night | 40°F | Partly Cloudy | 0 to 10 mph E | 0% |
| Tuesday | 61°F | Sunny | 0 to 10 mph E | 0% |
| Tuesday Night | 41°F | Mostly Clear | 5 to 10 mph E | 4% |
| Wednesday | 63°F | Mostly Sunny | 5 to 10 mph E | 4% |
| Wednesday Night | 44°F | Partly Cloudy | 5 to 10 mph SE | 3% |
| Thursday | 66°F | Mostly Sunny | 5 mph NW | 3% |
| Thursday Night | 46°F | Partly Cloudy | 5 mph SE | 3% |
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 Sep 18, 2026.