Decatur, IL — every free forecast we can get, averaged to be a little more right. County seat of Macon 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 46° Low 34° Rain 31%
They disagree — a coin flip (highs spread 2°, rain spread 74 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 32° | 11% |
| US model (GFS) | 45° | 34° | 4% |
| European model (ECMWF) | 46° | 36° | 78% |
| German model (ICON) | 47° | 33° | 15% |
| Canadian model (GEM) | 45° | 34° | 46% |
| The average | 46° | 34° | 31% |
High 43° Low 30° Rain 4%
They agree — trust it (highs spread 2°, rain spread 13 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 43° | 26° | 13% |
| US model (GFS) | 43° | 31° | 1% |
| European model (ECMWF) | 43° | 32° | 2% |
| German model (ICON) | 43° | 31° | 3% |
| Canadian model (GEM) | 41° | 30° | 0% |
| The average | 43° | 30° | 4% |
High 46° Low 26° Rain 0%
They agree — trust it (highs spread 1°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 46° | 27° | 0% |
| US model (GFS) | 47° | 24° | 0% |
| European model (ECMWF) | 47° | 29° | 0% |
| German model (ICON) | 46° | 28° | 0% |
| Canadian model (GEM) | 46° | 22° | 0% |
| The average | 46° | 26° | 0% |
High 49° Low 27° Rain 0%
They agree — trust it (highs spread 3°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 48° | 28° | 0% |
| US model (GFS) | 51° | 33° | 0% |
| European model (ECMWF) | 49° | 30° | 0% |
| German model (ICON) | 50° | 28° | 0% |
| Canadian model (GEM) | 48° | 17° | 0% |
| The average | 49° | 27° | 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.