Was the forecast right for Miami on Sun Sep 6?
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 Sun Sep 6 high anywhere from 86° to 92°; by the final call the field had settled to a median of 88°. The day verified at 92° against the MIA observations, with 0.02 in of precipitation — thunderstorms.
ICON landed closest, off by 1.3°. GEM ran 7° cold.
What every model said, at every lead
Daily-high calls for Sun Sep 6 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 · 2026-08-22 | — | 87° | — | — | 94° | — | — | 87–94° |
| 14d · 2026-08-23 | 86° | 89° | — | — | 92° | — | — | 86–92° |
| 13d · 2026-08-24 | 86° | 87° | 86° | — | 92° | — | — | 86–92° |
| 12d · 2026-08-25 | 88° | 89° | 87° | — | 93° | — | — | 87–93° |
| 11d · 2026-08-26 | 88° | 91° | 84° | — | 97° | — | — | 84–97° |
| 10d · 2026-08-27 | 88° | 89° | 89° | — | 92° | — | — | 88–92° |
| 9d · 2026-08-28 | 88° | 91° | 84° | — | 94° | — | — | 84–94° |
| 8d · 2026-08-29 | 85° | 90° | 86° | 90° | 91° | — | — | 85–91° |
| 7d · 2026-08-30 | 86° | 91° | 88° | 88° | 96° | — | — | 86–96° |
| 6d · 2026-08-31 | 85° | 93° | 86° | 89° | 94° | 95° | — | 85–95° |
| 5d · 2026-09-01 | 85° | 93° | 84° | 92° | 93° | 90° | 90° | 84–93° |
| 4d · 2026-09-02 | 84° | 95° | 83° | 91° | 94° | 88° | 89° | 83–95° |
| 3d · 2026-09-03 | 84° | 93° | 83° | 90° | 95° | 90° | 89° | 83–95° |
| 2d · 2026-09-04 | 85° | 92° | 83° | 92° | 96° | 92° | 89° | 83–96° |
| 1d · 2026-09-05 | 85° | 92° | 89° | 92° | 95° | 92° | 87° | 85–95° |
| 0d · 2026-09-06 | 85° | 94° | 86° | 85° | 95° | 91° | 88° | 85–95° |
| actual | 92° |
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.