Minnesota · Cass County
Blackwater Lake Ice-Out Dates
The ice usually goes out of Blackwater Lake around April 19 — the third week of April. Earliest ever: March 25 (2012). Latest: May 13 (2013).
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
18 years on the books, 1996–2022. Newest first.
| Year | Ice-out date |
|---|---|
| 2022 | May 7 |
| 2021 | April 6 |
| 2020 | April 22 |
| 2018 | May 3 |
| 2017 | April 5 |
| 2016 | April 8 |
| 2015 | April 11 |
| 2014 | April 30 |
| 2013 | May 13 |
| 2012 | March 25 |
| 2011 | April 25 |
| 2008 | May 4 |
| 2007 | April 20 |
| 2006 | April 12 |
| 2005 | April 14 |
| 2003 | April 16 |
| 2002 | April 19 |
| 1996 | May 4 |
When Blackwater freezes over
Blackwater Lake usually freezes over around November 28 — the fourth week of November. Earliest on record: November 12 (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 December 5. Newest first.
| Winter | Ice-in date |
|---|---|
| 2024–25 | December 5 |
| 2023–24 | November 28 |
| 2021–22 | December 7 |
| 2019–20 | November 12 |
| 2018–19 | November 20 |
| 2017–18 | November 21 |
| 2016–17 | December 14 |
| 2014–15 | November 25 |
| 2013–14 | November 24 |
| 2012–13 | December 5 |
| 2011–12 | December 2 |
| 2010–11 | November 28 |
| 2008–09 | November 25 |
| 2007–08 | November 28 |
| 2006–07 | December 2 |
| 2004–05 | December 14 |
| 2002–03 | November 15 |
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.