when can i shred?
Michigan · Upper Peninsula

Normally Oct 30

Snowmaking weather normally reaches Ironwood around Oct 30, 15 days away.

That is the whole estimate, and it describes the weather at a reference town. Nobody has filed an opening date for a resort here, so there is nothing to project from. The chart and the tiles below are the same ones the Minnesota page runs on, taken at Ironwood, Marquette and Sault Ste Marie instead of at resorts. The curve shown is Ironwood's.

Resorts tracked
0
Opening dates on file
0
Earliest normal window
Oct 30
Oct–Nov hrs there
373

When the guns can run

Snow guns need a wet-bulb temperature under 28°F. The mean at Ironwood does not get there until Nov 12, but the first workable window normally arrives on Oct 30. Resorts open on those early cold snaps rather than on the average.

60° 45° 30° 15° FIRST WORKABLE WINDOW Oct 10 normally Oct 30 Nov 18 COLD ENOUGH TO MAKE SNOW Average crosses 28° · Nov 12 Today · Oct 15 Aug 23 Oct 1 Nov 1 Dec 1 Jan 1 60° 45° 30° 15° FIRST WORKABLE WINDOW Oct 10 normally Oct 30 Nov 18 COLD ENOUGH TO MAKE SNOW Average crosses 28° · Nov 12 Today · Oct 15 Aug 23 Oct 1 Nov 1 Dec 1 Jan 1
Mean wet-bulb, Ironwood, 1995–2025 28°F snowmaking threshold Cold enough to make snow

The next two weeks

1 of 3 get snowmaking weather in the next 16 days.

Ironwood

29.8°

Coldest wet bulb the 16-day forecast reaches at Ironwood.

Coldest hour
Sat 17 Oct, 7am
Air temperature then
32.1°
Humidity then
85%
Hours under 28°
0
First window
—
Normal Oct–Nov hours
373

Marquette

32.7°

Coldest wet bulb the 16-day forecast reaches at Marquette.

Coldest hour
Sat 17 Oct, 3am
Air temperature then
36.3°
Humidity then
77%
Hours under 28°
0
First window
—
Normal Oct–Nov hours
221

Sault Ste Marie

27.3°

Coldest wet bulb the 16-day forecast reaches at Sault Ste Marie.

Coldest hour
Fri 16 Oct, 10pm
Air temperature then
32.0°
Humidity then
66%
Hours under 28°
9
First window
Fri 16 Oct, 10pm
Normal Oct–Nov hours
233

Wet-bulb forecast from Open-Meteo, updated twice a day. Guns can run under 28°.

Want resort-specific info? We need help!

We need somebody to find opening and closing dates, and to tell the pre-season opening apart from the full one where the two differ. That mostly means digging through Facebook feeds by hand. Sometimes the website has it. Minnesota shows what a region looks like once it is filled in.

17 resorts in this region, none with dates on file yet. From the Midwest Ski Resort Guide by Midwest Skiers.

Know a Michigan · Upper Peninsula resort's dates, or want to take on the whole state? Email eazydp@gmail.com. Dates for resorts already listed are just as welcome.