When Does Deer Lake Freeze? Typical Ice-In Nov 19, Ice-Out Apr 25
Deer Lake in Itasca County, Minnesota usually freezes over around Nov 19, and usually has ice-out around Apr 25, based on Minnesota DNR ice observations recorded between 1996-2017. That works out to roughly 208 days of open water a year. These are typical dates across many winters, not a forecast — individual years swing by weeks in either direction.
Ice record for Deer Lake
| Typical freeze-up (ice-in) | Nov 19 |
| Typical ice-out | Apr 25 |
| Earliest freeze-up on record | Nov 8, 2017 |
| Latest freeze-up on record | Dec 8, 2016 |
| Earliest ice-out on record | Apr 3, 2010 |
| Latest ice-out on record | May 13, 1996 |
| Open-water season | ~208 days |
| Winters observed | 29 |
| Location | Itasca County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Deer Lake has usually iced over — it does not tell you the ice is safe, and we hold no thickness measurement for this or any lake. The Minnesota DNR is explicit that no ice is ever completely safe: thickness varies across a single lake, and current, springs, aerators, and insulating snow all weaken it. Ice that held a truck last week may not hold a person today.
Read the ice-thickness guidelines before going out, and check current conditions with the Minnesota DNR ice-safety page and local bait shops, which track conditions lake by lake.
How much the timing varies
Ice-out on Deer Lake has landed as early as Apr 3, 2010 and as late as May 13, 1996 — a spread of weeks around the Apr 25 median. Freeze-up has ranged from Nov 8, 2017 to Dec 8, 2016. That year-to-year swing is why a median date is a planning tool, not a schedule. Freeze-up is driven by accumulated cold after the lake turns over in fall; ice-out by late-winter air temperature, sun angle, and how much snow sits on top of the ice reflecting it. The full nutrient and algae breakdown for Deer Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 1996-2017.
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