When Does Minnewawa Lake Freeze? Typical Ice-In Nov 23, Ice-Out Apr 18
Minnewawa Lake in Aitkin County, Minnesota usually freezes over around Nov 23, and usually has ice-out around Apr 18, based on Minnesota DNR ice observations recorded between 2012-2019. That works out to roughly 219 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 Minnewawa Lake
| Typical freeze-up (ice-in) | Nov 23 |
| Typical ice-out | Apr 18 |
| Earliest freeze-up on record | Nov 7, 2019 |
| Latest freeze-up on record | Dec 7, 2016 |
| Earliest ice-out on record | Mar 24, 2012 |
| Latest ice-out on record | May 11, 2013 |
| Open-water season | ~219 days |
| Winters observed | 63 |
| Location | Aitkin County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Minnewawa 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 Minnewawa Lake has landed as early as Mar 24, 2012 and as late as May 11, 2013 — a spread of weeks around the Apr 18 median. Freeze-up has ranged from Nov 7, 2019 to Dec 7, 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. Minnewawa Lake carries an overall water-quality grade of C — the full breakdown is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2012-2019.