Minnesota · St. Louis County
Thompson Lake Ice-Out Dates
The ice usually goes out of Thompson Lake around April 23 — the fourth week of April. Earliest ever: April 12 (2017). Latest: May 7 (2022).
The 2027 season
Tracking resumes when the ice forms.
Every recorded ice-out
11 years on the books, 2002–2023. Newest first.
| Year | Ice-out date |
|---|---|
| 2023 | May 3 |
| 2022 | May 7 |
| 2020 | April 26 |
| 2017 | April 12 |
| 2008 | May 1 |
| 2007 | April 23 |
| 2006 | April 13 |
| 2005 | April 14 |
| 2004 | April 21 |
| 2003 | April 25 |
| 2002 | April 21 |
When Thompson freezes over
Thompson Lake usually freezes over around November 16 — the third week of November. Earliest on record: November 8 (2003–04). Latest: December 1 (2006–07).
A freeze-up crosses New Year, so each row is the winter it belongs to: the winter of 2018–19 froze on November 10. Newest first.
| Winter | Ice-in date |
|---|---|
| 2018–19 | November 10 |
| 2017–18 | November 10 |
| 2015–16 | November 21 |
| 2007–08 | November 22 |
| 2006–07 | December 1 |
| 2005–06 | November 16 |
| 2004–05 | November 24 |
| 2003–04 | November 8 |
| 2002–03 | November 13 |
| 2001–02 | November 27 |
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.