Was the forecast right for Washington on Tue Sep 29?
Washington, District of Columbia · daily high temperature in °F · forecasts from each model's archived runs, verified against the DCA observations
14 days out, 4 models put Washington's Tue Sep 29 high anywhere from 70° to 94°;by the final call, the day before, the field had settled to a median of 76°. The day verified at 74° against the DCA observations — cloudy.
ECMWF landed closest, off by 0.7°. GEM ran 2° warm.
What every model said, at every lead
Daily-high calls for Tue Sep 29 as each model's runs approached it — the last archived run per day. NBM and The Spread's own blend are consensus products and stay out of these ranges and rankings; the Washington scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-14 | — | 72° | — | — | 70° | — | — | 70–72° |
| 14d · 2026-09-15 | 81° | 70° | 76° | — | 94° | — | — | 70–94° |
| 13d · 2026-09-16 | 77° | 62° | 69° | — | 81° | — | — | 62–81° |
| 12d · 2026-09-17 | 67° | 82° | 76° | — | 62° | — | — | 62–82° |
| 11d · 2026-09-18 | 71° | 73° | 80° | — | 77° | — | — | 71–80° |
| 10d · 2026-09-19 | 79° | 77° | 72° | — | 64° | — | — | 64–79° |
| 9d · 2026-09-20 | 79° | 79° | 70° | 74° | 79° | — | — | 70–79° |
| 8d · 2026-09-21 | 76° | 82° | 69° | 75° | 83° | — | — | 69–83° |
| 7d · 2026-09-22 | 79° | 80° | 75° | 79° | 82° | — | — | 75–82° |
| 6d · 2026-09-23 | 76° | 79° | 76° | 80° | 80° | 75° | 74° | 74–80° |
| 5d · 2026-09-24 | 76° | 77° | 77° | 76° | 73° | 78° | 76° | 73–78° |
| 4d · 2026-09-25 | 76° | 76° | 75° | 75° | 74° | 76° | 74° | 74–76° |
| 3d · 2026-09-26 | 76° | 75° | 75° | 76° | 74° | 77° | 74° | 74–77° |
| 2d · 2026-09-27 | 76° | 76° | 74° | 77° | 79° | 74° | 77° | 74–79° |
| 1d · 2026-09-28 | 75° | 76° | 75° | 76° | 76° | 76° | 75° | 75–76° |
| actual | 74° |
Read it honestly
This is one date, not a league table. A model can win a day it deserved to lose; rankings only mean something over a window. For that, see which model has been most accurate in Washington — or every city The Spread scores.
Forecasts are what each model's archived runs said at the time, captured at The Spread's sweep times — never reconstructed after the fact. Truth is the DCA observations. The actual values are the ones in hand when this receipt was settled, usually 2 days after the date; a correction published after that is not carried into it. Archive depth varies by city; receipts exist only for dates the archive watched arrive.