Duncan, OK — every free forecast we can get, averaged to be a little more right. County seat of Stephens 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 74° Low 45° Rain 0%
Pretty close — fairly safe (highs spread 4°, rain spread 0 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 43° | 0% |
| US model (GFS) | 75° | 47° | 0% |
| European model (ECMWF) | 72° | 46° | 0% |
| German model (ICON) | 73° | 46° | 0% |
| Canadian model (GEM) | 75° | 45° | 0% |
| The average | 74° | 45° | 0% |
High 60° Low 43° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 60° | 41° | 0% |
| US model (GFS) | 61° | 45° | 0% |
| European model (ECMWF) | 59° | 44° | 0% |
| German model (ICON) | 60° | 41° | 0% |
| Canadian model (GEM) | 62° | 44° | 0% |
| The average | 60° | 43° | 0% |
High 57° Low 42° Rain 83%
They disagree — a coin flip (highs spread 2°, rain spread 31 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 58° | 42° | 91% |
| US model (GFS) | 59° | 41° | 74% |
| European model (ECMWF) | 57° | 44° | 94% |
| German model (ICON) | 56° | 42° | 93% |
| Canadian model (GEM) | 58° | 42° | 63% |
| The average | 57° | 42° | 83% |
High 47° Low 42° Rain 95%
Pretty close — fairly safe (highs spread 6°, rain spread 13 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 50° | 39° | 88% |
| US model (GFS) | 49° | 43° | 87% |
| European model (ECMWF) | 47° | 43° | 100% |
| German model (ICON) | 44° | 42° | 98% |
| Canadian model (GEM) | 44° | 41° | 100% |
| The average | 47° | 42° | 95% |
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.