Rockville, MD — every free forecast we can get, averaged to be a little more right. County seat of Montgomery 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 62° Low 45° Rain 51%
They disagree — a coin flip (highs spread 2°, rain spread 85 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 42° | 7% |
| US model (GFS) | 61° | 45° | 20% |
| European model (ECMWF) | 63° | 47° | 92% |
| German model (ICON) | 61° | 48° | 88% |
| Canadian model (GEM) | 63° | 45° | 48% |
| The average | 62° | 45° | 51% |
High 47° Low 37° Rain 26%
They disagree — a coin flip (highs spread 4°, rain spread 44 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 47° | 34° | 16% |
| US model (GFS) | 45° | 34° | 3% |
| European model (ECMWF) | 48° | 41° | 47% |
| German model (ICON) | 49° | 36° | 35% |
| Canadian model (GEM) | 46° | 40° | 29% |
| The average | 47° | 37° | 26% |
High 48° Low 34° Rain 7%
Pretty close — fairly safe (highs spread 2°, rain spread 17 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 49° | 36° | 6% |
| US model (GFS) | 48° | 31° | 2% |
| European model (ECMWF) | 48° | 37° | 1% |
| German model (ICON) | 49° | 33° | 10% |
| Canadian model (GEM) | 48° | 32° | 18% |
| The average | 48° | 34° | 7% |
High 50° Low 39° Rain 1%
Pretty close — fairly safe (highs spread 3°, rain spread 4 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 51° | 34° | 0% |
| US model (GFS) | 48° | 40° | 0% |
| European model (ECMWF) | 51° | 41° | 4% |
| German model (ICON) | 50° | 38° | 0% |
| Canadian model (GEM) | 50° | 40° | 0% |
| The average | 50° | 39° | 1% |
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.