Upper Marlboro, MD — every free forecast we can get, averaged to be a little more right. County seat of Prince George's 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 65° Low 47° Rain 48%
They disagree — a coin flip (highs spread 3°, rain spread 82 points, 4 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | — | 43° | 6% |
| US model (GFS) | 66° | 44° | 20% |
| European model (ECMWF) | 65° | 50° | 73% |
| German model (ICON) | 63° | 51° | 88% |
| Canadian model (GEM) | 65° | 48° | 52% |
| The average | 65° | 47° | 48% |
High 49° Low 38° Rain 30%
They disagree — a coin flip (highs spread 4°, rain spread 39 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 48° | 33° | 17% |
| US model (GFS) | 48° | 36° | 8% |
| European model (ECMWF) | 49° | 40° | 47% |
| German model (ICON) | 51° | 39° | 38% |
| Canadian model (GEM) | 49° | 42° | 40% |
| The average | 49° | 38° | 30% |
High 50° Low 35° Rain 10%
Pretty close — fairly safe (highs spread 2°, rain spread 23 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 51° | 35° | 4% |
| US model (GFS) | 50° | 31° | 2% |
| European model (ECMWF) | 49° | 36° | 3% |
| German model (ICON) | 50° | 35° | 18% |
| Canadian model (GEM) | 49° | 36° | 25% |
| The average | 50° | 35° | 10% |
High 52° Low 39° Rain 0%
Pretty close — fairly safe (highs spread 4°, rain spread 2 points, 5 sources)
| Source | High | Low | Rain |
|---|---|---|---|
| National Weather Service | 54° | 34° | 0% |
| US model (GFS) | 50° | 41° | 0% |
| European model (ECMWF) | 52° | 41° | 2% |
| German model (ICON) | 52° | 39° | 0% |
| Canadian model (GEM) | 51° | 42° | 0% |
| The average | 52° | 39° | 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.