Onida, SD — every free forecast we can get, averaged to be a little more right. County seat of Sully 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 39° Low 26° Rain 1%
Pretty close — fairly safe (highs spread 5°, rain spread 5 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 22° | 0% |
| US model (GFS) | 37° | 31° | 0% |
| European model (ECMWF) | 40° | 28° | 0% |
| German model (ICON) | 38° | 27° | 0% |
| Canadian model (GEM) | 42° | 24° | 5% |
| The average | 39° | 26° | 1% |
High 42° Low 26° Rain 0%
They disagree — a coin flip (highs spread 9°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 41° | 26° | 0% |
| US model (GFS) | 37° | 30° | 0% |
| European model (ECMWF) | 44° | 27° | 0% |
| German model (ICON) | 43° | 25° | 0% |
| Canadian model (GEM) | 46° | 22° | 0% |
| The average | 42° | 26° | 0% |
High 47° Low 31° Rain 0%
Pretty close — fairly safe (highs spread 6°, rain spread 1 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 43° | 32° | 0% |
| US model (GFS) | 49° | 30° | 1% |
| European model (ECMWF) | 46° | 32° | 0% |
| German model (ICON) | 47° | 32° | 0% |
| Canadian model (GEM) | 48° | 30° | 0% |
| The average | 47° | 31° | 0% |
High 57° Low 37° Rain 0%
They disagree — a coin flip (highs spread 7°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 53° | 37° | 0% |
| US model (GFS) | 57° | 37° | 0% |
| European model (ECMWF) | 56° | 38° | 0% |
| German model (ICON) | 60° | 38° | 0% |
| Canadian model (GEM) | 56° | 36° | 0% |
| The average | 57° | 37° | 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.