Bison, SD — every free forecast we can get, averaged to be a little more right. County seat of Perkins County.
Updated Friday, November 13, 2026. Recorded fresh this morning from five free sources, and graded later against what the weather actually did.
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High 40° Low 30° Rain 0%
They disagree — a coin flip (highs spread 6°, rain spread 1 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 25° | 0% |
| US model (GFS) | 36° | 32° | 1% |
| European model (ECMWF) | 42° | 32° | 0% |
| German model (ICON) | 39° | 30° | 0% |
| Canadian model (GEM) | 43° | 30° | 0% |
| The average | 40° | 30° | 0% |
High 43° Low 29° Rain 0%
They disagree — a coin flip (highs spread 12°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 45° | 29° | 0% |
| US model (GFS) | 35° | 32° | 0% |
| European model (ECMWF) | 45° | 29° | 0% |
| German model (ICON) | 40° | 29° | 0% |
| Canadian model (GEM) | 48° | 27° | 0% |
| The average | 43° | 29° | 0% |
High 49° Low 33° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 48° | 32° | 0% |
| US model (GFS) | 50° | 33° | 0% |
| European model (ECMWF) | 49° | 34° | 0% |
| German model (ICON) | 48° | 34° | 0% |
| Canadian model (GEM) | 49° | 32° | 0% |
| The average | 49° | 33° | 0% |
High 57° Low 36° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 56° | 33° | 0% |
| US model (GFS) | 56° | 40° | 0% |
| European model (ECMWF) | 58° | 38° | 0% |
| German model (ICON) | 56° | 33° | 0% |
| Canadian model (GEM) | 57° | 35° | 0% |
| The average | 57° | 36° | 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.