Was the forecast right for Seattle on Wed Aug 12?
Seattle, Washington · daily high temperature in °F · forecasts from each model's archived runs, verified against ERA5
14 days out, 4 models put Seattle's Wed Aug 12 high anywhere from 78° to 88°; by the final call the field had settled to a median of 75°. ERA5 says the day verified at 76° — partly cloudy.
UKMO landed closest, off by 0.1°. AIGFS ran 3° hot.
What every model said, at every lead
Daily-high calls for Wed Aug 12 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 · 2026-07-28 | — | 81° | — | — | 82° | — | — | 81–82° |
| 14d · 2026-07-29 | 78° | 79° | 79° | — | 88° | — | — | 78–88° |
| 13d · 2026-07-30 | 65° | 79° | 76° | — | 78° | — | — | 65–79° |
| 12d · 2026-07-31 | 80° | 76° | 73° | — | 69° | — | — | 69–80° |
| 11d · 2026-08-01 | 72° | 85° | 80° | — | 80° | — | — | 72–85° |
| 10d · 2026-08-02 | 69° | 85° | 79° | — | 86° | — | — | 69–86° |
| 9d · 2026-08-03 | 77° | 77° | 73° | 77° | 81° | — | — | 73–81° |
| 8d · 2026-08-04 | 77° | 82° | 78° | 78° | 87° | — | — | 77–87° |
| 7d · 2026-08-05 | 70° | 71° | 76° | 73° | 78° | — | — | 70–78° |
| 6d · 2026-08-06 | 75° | 68° | 79° | 78° | 81° | 76° | 79° | 68–81° |
| 5d · 2026-08-07 | 74° | 68° | 77° | 76° | 75° | 72° | 72° | 68–77° |
| 4d · 2026-08-08 | 74° | 70° | 76° | 75° | 83° | 77° | 72° | 70–83° |
| 3d · 2026-08-09 | 74° | 80° | 76° | 70° | 80° | 75° | 76° | 70–80° |
| 2d · 2026-08-10 | 73° | 76° | 75° | 72° | 82° | 75° | 75° | 72–82° |
| 1d · 2026-08-11 | 73° | 76° | 75° | 77° | 76° | 74° | 77° | 73–77° |
| 0d · 2026-08-12 | 73° | 79° | 75° | 77° | 75° | 74° | 76° | 73–79° |
| actual | 76° |
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 ERA5 reanalysis (temperature_2m_max). Archive depth varies by city; receipts exist only for dates the archive watched arrive.