When Does Green Prairie Fish Lake Freeze? Typical Ice-In Dec 1, Ice-Out Apr 16
Green Prairie Fish Lake in Morrison County, Minnesota usually freezes over around Dec 1, and usually has ice-out around Apr 16, based on Minnesota DNR ice observations recorded between 2008-2024. That works out to roughly 229 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 Green Prairie Fish Lake
| Typical freeze-up (ice-in) | Dec 1 |
| Typical ice-out | Apr 16 |
| Earliest freeze-up on record | Nov 10, 2018 |
| Latest freeze-up on record | Dec 11, 2017 |
| Earliest ice-out on record | Mar 11, 2024 |
| Latest ice-out on record | Apr 29, 2008 |
| Open-water season | ~229 days |
| Winters observed | 14 |
| Location | Morrison County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Green Prairie Fish 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 Green Prairie Fish Lake has landed as early as Mar 11, 2024 and as late as Apr 29, 2008 — a spread of weeks around the Apr 16 median. Freeze-up has ranged from Nov 10, 2018 to Dec 11, 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 Green Prairie Fish Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2008-2024.
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