When Does Pine Lake Freeze? Typical Ice-In Nov 30, Ice-Out Apr 16
Pine Lake in Aitkin County, Minnesota usually freezes over around Nov 30, and usually has ice-out around Apr 16, based on Minnesota DNR ice observations recorded between 2017-2024. That works out to roughly 228 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 Pine Lake
| Typical freeze-up (ice-in) | Nov 30 |
| Typical ice-out | Apr 16 |
| Earliest freeze-up on record | Nov 20, 2018 |
| Latest freeze-up on record | Dec 12, 2017 |
| Earliest ice-out on record | Mar 12, 2024 |
| Latest ice-out on record | May 1, 2018 |
| Open-water season | ~228 days |
| Winters observed | 17 |
| Location | Aitkin County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Pine 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 Pine Lake has landed as early as Mar 12, 2024 and as late as May 1, 2018 — a spread of weeks around the Apr 16 median. Freeze-up has ranged from Nov 20, 2018 to Dec 12, 2017. 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 Pine Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2017-2024.
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