Petersburg, IL — every free forecast we can get, averaged to be a little more right. County seat of Menard 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 47° Low 34° Rain 13%
They disagree — a coin flip (highs spread 2°, rain spread 41 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 30° | 4% |
| US model (GFS) | 46° | 34° | 0% |
| European model (ECMWF) | 47° | 38° | 41% |
| German model (ICON) | 47° | 33° | 8% |
| Canadian model (GEM) | 46° | 33° | 14% |
| The average | 47° | 34° | 13% |
High 43° Low 29° Rain 1%
They agree — trust it (highs spread 1°, rain spread 4 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 43° | 25° | 4% |
| US model (GFS) | 43° | 29° | 1% |
| European model (ECMWF) | 43° | 34° | 0% |
| German model (ICON) | 44° | 29° | 0% |
| Canadian model (GEM) | 43° | 29° | 0% |
| The average | 43° | 29° | 1% |
High 47° Low 26° Rain 0%
They agree — trust it (highs spread 2°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 47° | 26° | 0% |
| US model (GFS) | 46° | 24° | 0% |
| European model (ECMWF) | 46° | 29° | 0% |
| German model (ICON) | 48° | 27° | 0% |
| Canadian model (GEM) | 45° | 22° | 0% |
| The average | 47° | 26° | 0% |
High 50° Low 27° Rain 0%
Pretty close — fairly safe (highs spread 4°, rain spread 0 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 50° | 27° | 0% |
| US model (GFS) | 51° | 33° | 0% |
| European model (ECMWF) | 49° | 29° | 0% |
| German model (ICON) | 51° | 28° | 0% |
| Canadian model (GEM) | 48° | 17° | 0% |
| The average | 50° | 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.