Altamont, TN — every free forecast we can get, averaged to be a little more right. County seat of Grundy 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 56° Low 37° Rain 44%
They disagree — a coin flip (highs spread 2°, rain spread 89 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 31° | 1% |
| US model (GFS) | 57° | 40° | 25% |
| European model (ECMWF) | 56° | 39° | 73% |
| German model (ICON) | 56° | 39° | 33% |
| Canadian model (GEM) | 55° | 39° | 90% |
| The average | 56° | 37° | 44% |
High 41° Low 32° Rain 9%
Pretty close — fairly safe (highs spread 3°, rain spread 24 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 42° | 30° | 7% |
| US model (GFS) | 40° | 32° | 1% |
| European model (ECMWF) | 41° | 35° | 24% |
| German model (ICON) | 43° | 32° | 0% |
| Canadian model (GEM) | 40° | 31° | 11% |
| The average | 41° | 32° | 9% |
High 45° Low 30° Rain 7%
Pretty close — fairly safe (highs spread 2°, rain spread 18 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 45° | 27° | 0% |
| US model (GFS) | 45° | 32° | 0% |
| European model (ECMWF) | 45° | 31° | 18% |
| German model (ICON) | 46° | 32° | 0% |
| Canadian model (GEM) | 44° | 27° | 15% |
| The average | 45° | 30° | 7% |
High 51° Low 29° Rain 0%
They agree — trust it (highs spread 2°, rain spread 1 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 51° | 31° | 1% |
| US model (GFS) | 50° | 31° | 0% |
| European model (ECMWF) | 50° | 29° | 0% |
| German model (ICON) | 52° | 31° | 0% |
| Canadian model (GEM) | 50° | 25° | 0% |
| The average | 51° | 29° | 0% |
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.