Minnesota · Aitkin County
Hammal Lake Ice-Out Dates
The ice usually goes out of Hammal Lake around April 10 — the second week of April. Earliest ever: March 30 (2017). Latest: May 1 (2022).
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
12 years on the books, 2003–2024. Newest first.
| Year | Ice-out date |
|---|---|
| 2024 | April 2 |
| 2022 | May 1 |
| 2021 | April 4 |
| 2020 | April 9 |
| 2019 | April 21 |
| 2017 | March 30 |
| 2008 | April 25 |
| 2007 | April 17 |
| 2006 | April 7 |
| 2005 | April 10 |
| 2004 | April 14 |
| 2003 | April 13 |
When Hammal freezes over
Hammal Lake usually freezes over around November 27 — the fourth week of November. Earliest on record: November 8 (2019–20). Latest: December 14 (2004–05).
A freeze-up crosses New Year, so each row is the winter it belongs to: the winter of 2024–25 froze on November 30. Newest first.
| Winter | Ice-in date |
|---|---|
| 2024–25 | November 30 |
| 2023–24 | November 28 |
| 2021–22 | November 23 |
| 2020–21 | December 1 |
| 2019–20 | November 8 |
| 2017–18 | November 10 |
| 2007–08 | November 27 |
| 2006–07 | November 30 |
| 2005–06 | November 25 |
| 2004–05 | December 14 |
| 2003–04 | November 18 |
Records: Minnesota DNR ice-in records. Last checked August 2026.
Late ice is unpredictable — no date on this page says the ice is safe.
Records: Minnesota DNR ice-out records. Last checked August 2026.