When Does Rush Island Lake Freeze? Typical Ice-In Nov 29, Ice-Out Apr 24
Rush Island Lake in Itasca County, Minnesota usually freezes over around Nov 29, and usually has ice-out around Apr 24, based on Minnesota DNR ice observations recorded between 2001-2008. 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 Rush Island Lake
| Typical freeze-up (ice-in) | Nov 29 |
| Typical ice-out | Apr 24 |
| Earliest freeze-up on record | Nov 18, 2008 |
| Latest freeze-up on record | Dec 1, 2001 |
| Earliest ice-out on record | Apr 20, 2002 |
| Latest ice-out on record | May 5, 2008 |
| Open-water season | ~219 days |
| Winters observed | 7 |
| Location | Itasca County, Minnesota |
These are dates, not an ice-safety reading
A typical freeze-up date tells you when Rush Island 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 Rush Island Lake has landed as early as Apr 20, 2002 and as late as May 5, 2008 — a spread of weeks around the Apr 24 median. Freeze-up has ranged from Nov 18, 2008 to Dec 1, 2001. 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 Rush Island Lake is on the lake report.
Source: Minnesota DNR Climate Office ice-in / ice-out records, observations from 2001-2008.
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