Mount Vernon, IL — every free forecast we can get, averaged to be a little more right. County seat of Jefferson 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 54° Low 35° Rain 12%
Pretty close — fairly safe (highs spread 2°, rain spread 24 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 32° | 3% |
| US model (GFS) | 53° | 36° | 9% |
| European model (ECMWF) | 54° | 39° | 27% |
| German model (ICON) | 54° | 33° | 15% |
| Canadian model (GEM) | 55° | 35° | 5% |
| The average | 54° | 35° | 12% |
High 46° Low 32° Rain 1%
Pretty close — fairly safe (highs spread 4°, rain spread 5 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 47° | 26° | 5% |
| US model (GFS) | 44° | 32° | 0% |
| European model (ECMWF) | 45° | 37° | 0% |
| German model (ICON) | 48° | 30° | 0% |
| Canadian model (GEM) | 46° | 32° | 0% |
| The average | 46° | 32° | 1% |
High 49° Low 27° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 49° | 26° | 0% |
| US model (GFS) | 48° | 25° | 0% |
| European model (ECMWF) | 49° | 32° | 0% |
| German model (ICON) | 50° | 25° | 0% |
| Canadian model (GEM) | 48° | 26° | 0% |
| The average | 49° | 27° | 0% |
High 52° Low 27° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 52° | 27° | 0% |
| US model (GFS) | 53° | 33° | 0% |
| European model (ECMWF) | 52° | 31° | 0% |
| German model (ICON) | 54° | 25° | 0% |
| Canadian model (GEM) | 51° | 21° | 0% |
| The average | 52° | 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.