Corunna, MI — every free forecast we can get, averaged to be a little more right. County seat of Shiawassee County.
Updated Friday, November 13, 2026. Recorded fresh this morning from five free sources, and graded later against what the weather actually did.
← All cities and the scoreboard
High 47° Low 36° Rain 69%
They disagree — a coin flip (highs spread 2°, rain spread 84 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 31° | 16% |
| US model (GFS) | 46° | 37° | 56% |
| European model (ECMWF) | 48° | 38° | 100% |
| German model (ICON) | 46° | 37° | 90% |
| Canadian model (GEM) | 46° | 36° | 81% |
| The average | 47° | 36° | 69% |
High 40° Low 31° Rain 18%
Pretty close — fairly safe (highs spread 4°, rain spread 25 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 42° | 27° | 17% |
| US model (GFS) | 39° | 32° | 17% |
| European model (ECMWF) | 41° | 34° | 33% |
| German model (ICON) | 41° | 32° | 8% |
| Canadian model (GEM) | 38° | 30° | 14% |
| The average | 40° | 31° | 18% |
High 43° Low 31° Rain 1%
Pretty close — fairly safe (highs spread 5°, rain spread 2 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 44° | 32° | 0% |
| US model (GFS) | 41° | 31° | 2% |
| European model (ECMWF) | 44° | 30° | 0% |
| German model (ICON) | 46° | 30° | 1% |
| Canadian model (GEM) | 42° | 32° | 0% |
| The average | 43° | 31° | 1% |
High 44° Low 32° Rain 1%
Pretty close — fairly safe (highs spread 4°, rain spread 3 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 45° | 29° | 0% |
| US model (GFS) | 46° | 36° | 0% |
| European model (ECMWF) | 42° | 33° | 0% |
| German model (ICON) | 45° | 36° | 3% |
| Canadian model (GEM) | 43° | 27° | 0% |
| The average | 44° | 32° | 1% |
Scoring has started — every forecast is being recorded. The first grades land once the historical record publishes what actually happened (it runs a few days behind), and this board fills in from there.