Was the forecast right for Seattle on Thu Oct 15?
Seattle, Washington · daily high temperature in °F · forecasts from each model's archived runs, verified against the SEA observations
14 days out, 4 models put Seattle's Thu Oct 15 high anywhere from 56° to 58°;by the final call, the day before, the field had settled to a median of 69°. The day verified at 68° against the SEA observations — fog.
UKMO landed closest, off by 0.3°. GEM ran 7° warm.
What every model said, at every lead
Daily-high calls for Thu Oct 15 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 Seattle scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-30 | — | 71° | — | — | 68° | — | — | 68–71° |
| 14d · 2026-10-01 | 58° | 58° | 56° | — | 56° | — | — | 56–58° |
| 13d · 2026-10-02 | 64° | 64° | 57° | — | 72° | — | — | 57–72° |
| 12d · 2026-10-03 | 64° | 59° | 58° | — | 63° | — | — | 58–64° |
| 11d · 2026-10-04 | 64° | 66° | 56° | — | 69° | — | — | 56–69° |
| 10d · 2026-10-05 | 62° | 68° | 56° | — | 69° | — | — | 56–69° |
| 9d · 2026-10-06 | 59° | 63° | 65° | 56° | 60° | — | — | 56–65° |
| 8d · 2026-10-07 | 58° | 56° | 59° | 60° | 59° | — | — | 56–60° |
| 7d · 2026-10-08 | 64° | 57° | 60° | 59° | 66° | 63° | — | 57–66° |
| 6d · 2026-10-09 | 67° | 58° | 67° | 66° | 64° | 63° | 67° | 58–67° |
| 5d · 2026-10-10 | 67° | 64° | 67° | 67° | 67° | 67° | 68° | 64–68° |
| 4d · 2026-10-11 | 68° | 68° | 66° | 68° | 71° | 67° | 69° | 66–71° |
| 3d · 2026-10-12 | — | 68° | 68° | 77° | 72° | 69° | 69° | 68–77° |
| 2d · 2026-10-13 | 70° | 69° | 66° | 72° | 72° | 69° | 69° | 66–72° |
| 1d · 2026-10-14 | 70° | 69° | 65° | 75° | 72° | 66° | 68° | 65–75° |
| actual | 68° |
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 Seattle — 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 SEA 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.