Chambersburg, PA — every free forecast we can get, averaged to be a little more right. County seat of Franklin 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 58° Low 42° Rain 55%
They disagree — a coin flip (highs spread 5°, rain spread 53 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 37° | 28% |
| US model (GFS) | 56° | 42° | 32% |
| European model (ECMWF) | 61° | 44° | 81% |
| German model (ICON) | 57° | 44° | 55% |
| Canadian model (GEM) | 57° | 44° | 81% |
| The average | 58° | 42° | 55% |
High 45° Low 36° Rain 50%
They disagree — a coin flip (highs spread 5°, rain spread 62 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 45° | 32° | 35% |
| US model (GFS) | 42° | 35° | 14% |
| European model (ECMWF) | 47° | 40° | 76% |
| German model (ICON) | 44° | 35° | 55% |
| Canadian model (GEM) | 45° | 39° | 71% |
| The average | 45° | 36° | 50% |
High 46° Low 34° Rain 7%
Pretty close — fairly safe (highs spread 2°, rain spread 18 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 47° | 34° | 8% |
| US model (GFS) | 46° | 31° | 2% |
| European model (ECMWF) | 48° | 36° | 4% |
| German model (ICON) | 46° | 33° | 3% |
| Canadian model (GEM) | 46° | 37° | 20% |
| The average | 46° | 34° | 7% |
High 48° Low 37° Rain 2%
They agree — trust it (highs spread 3°, rain spread 6 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 50° | 31° | 0% |
| US model (GFS) | 47° | 35° | 0% |
| European model (ECMWF) | 48° | 40° | 6% |
| German model (ICON) | 48° | 38° | 3% |
| Canadian model (GEM) | 47° | 40° | 0% |
| The average | 48° | 37° | 2% |
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.