Was the forecast right for Miami on Sat Sep 12?
Miami, Florida · daily high temperature in °F · forecasts from each model's archived runs, verified against the MIA observations
13 days out, 4 models put Miami's Sat Sep 12 high anywhere from 87° to 91°; by the final call the field had settled to a median of 88°. The day verified at 93° against the MIA observations — thunderstorms.
GFS landed closest, off by 1.4°. ECMWF ran 9° cold.
What every model said, at every lead
Daily-high calls for Sat Sep 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 Miami scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-28 | — | 84° | — | — | 95° | — | — | 84–95° |
| 14d · 2026-08-29 | 90° | 94° | — | — | 95° | — | — | 90–95° |
| 13d · 2026-08-30 | 88° | 90° | 87° | — | 91° | — | — | 87–91° |
| 12d · 2026-08-31 | 88° | 88° | 82° | — | 95° | — | — | 82–95° |
| 11d · 2026-09-01 | 88° | 90° | 85° | — | 93° | — | — | 85–93° |
| 10d · 2026-09-02 | 87° | 91° | 84° | — | 94° | — | — | 84–94° |
| 9d · 2026-09-03 | 85° | 89° | 84° | — | 94° | — | — | 84–94° |
| 8d · 2026-09-04 | 85° | 94° | 87° | 91° | 92° | — | — | 85–94° |
| 7d · 2026-09-05 | 86° | 92° | 85° | 92° | 94° | — | — | 85–94° |
| 6d · 2026-09-06 | 86° | 90° | 86° | 92° | 92° | 89° | — | 86–92° |
| 5d · 2026-09-07 | 85° | 91° | 85° | 90° | 93° | 93° | 91° | 85–93° |
| 4d · 2026-09-08 | 85° | 91° | 81° | 91° | 86° | 88° | 89° | 81–91° |
| 3d · 2026-09-09 | 85° | 88° | 84° | 92° | 93° | 87° | 86° | 84–93° |
| 2d · 2026-09-10 | 85° | 89° | 87° | 92° | 92° | 88° | 86° | 85–92° |
| 1d · 2026-09-11 | 84° | 89° | 83° | 91° | 93° | 88° | 88° | 83–93° |
| 0d · 2026-09-12 | 87° | 89° | 84° | 87° | 94° | 88° | 88° | 84–94° |
| actual | 93° |
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 Miami — 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 MIA observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.