Was the forecast right for Miami on Wed Sep 2?
Miami, Florida · daily high temperature in °C · forecasts from each model's archived runs, verified against the MIA observations
11 days out, 4 models put Miami's Wed Sep 2 high anywhere from 30° to 35°; by the final call the field had settled to a median of 31°. The day verified at 32° against the MIA observations, with 5.8 mm of precipitation — thunderstorms.
ICON landed closest, off by 0.1°. GEM ran 2° cold.
What every model said, at every lead
Daily-high calls for Wed Sep 2 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 |
|---|---|---|---|---|---|---|---|---|
| 11d · 2026-08-22 | 31° | 32° | 30° | — | 35° | — | — | 30–35° |
| 10d · 2026-08-23 | 30° | 32° | 29° | — | 34° | — | — | 29–34° |
| 9d · 2026-08-24 | 30° | 32° | 29° | — | 33° | — | — | 29–33° |
| 8d · 2026-08-25 | 30° | 32° | 29° | 32° | 34° | — | — | 29–34° |
| 7d · 2026-08-26 | 30° | 32° | 28° | 34° | 34° | — | — | 28–34° |
| 6d · 2026-08-27 | 30° | 32° | 30° | 33° | 34° | 33° | — | 30–34° |
| 5d · 2026-08-28 | 30° | 32° | 29° | 33° | 32° | 32° | 31° | 29–33° |
| 4d · 2026-08-29 | 30° | 31° | 31° | 34° | 34° | 32° | 32° | 30–34° |
| 3d · 2026-08-30 | 30° | 32° | 30° | 33° | 33° | 33° | 32° | 30–33° |
| 2d · 2026-08-31 | 30° | 33° | 30° | 34° | 34° | 33° | 32° | 30–34° |
| 1d · 2026-09-01 | 30° | 33° | 31° | 31° | 35° | 33° | 33° | 30–35° |
| 0d · 2026-09-02 | 30° | 34° | 31° | 30° | 35° | 32° | 31° | 30–35° |
| actual | 32° |
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.