Was the forecast right for Seattle on Tue Oct 20?
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 Tue Oct 20 high anywhere from 56° to 68°;by the final call, the day before, the field had settled to a median of 60°. The day verified at 62° against the SEA observations — fog.
GFS landed closest, off by 0.9°. AIGFS ran 6° cool.
What every model said, at every lead
Daily-high calls for Tue Oct 20 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 · 2026-10-05 | — | 62° | — | — | 71° | — | — | 62–71° |
| 14d · 2026-10-06 | 59° | 59° | 56° | — | 68° | — | — | 56–68° |
| 13d · 2026-10-07 | 59° | 53° | 54° | — | 55° | — | — | 53–59° |
| 12d · 2026-10-08 | 54° | 54° | 55° | — | 55° | — | — | 54–55° |
| 11d · 2026-10-09 | 54° | 51° | 51° | — | 53° | — | — | 51–54° |
| 10d · 2026-10-10 | 54° | 55° | 55° | — | 56° | — | — | 54–56° |
| 9d · 2026-10-11 | 54° | 54° | 52° | 53° | 54° | — | — | 52–54° |
| 8d · 2026-10-12 | — | 52° | 55° | 57° | 56° | — | — | 52–57° |
| 7d · 2026-10-13 | 56° | 56° | 55° | 60° | 62° | 57° | — | 55–62° |
| 6d · 2026-10-14 | 57° | 54° | 58° | 58° | 59° | 56° | 56° | 54–59° |
| 5d · 2026-10-15 | 58° | 56° | 56° | 57° | 59° | 58° | 55° | 55–59° |
| 4d · 2026-10-16 | 59° | 55° | 57° | 59° | 59° | 59° | 59° | 55–59° |
| 3d · 2026-10-17 | 59° | 57° | 59° | 61° | 61° | 59° | 59° | 57–61° |
| 2d · 2026-10-18 | 59° | 56° | 60° | 63° | 62° | 60° | 61° | 56–63° |
| 1d · 2026-10-19 | 59° | 56° | 60° | 64° | 63° | 60° | 61° | 56–64° |
| actual | 62° |
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.