Was the forecast right for Miami on Tue Sep 1?
Miami, Florida · daily high temperature in °F · forecasts from each model's archived runs, verified against the MIA observations
11 days out, 4 models put Miami's Tue Sep 1 high anywhere from 86° to 93°;by the final call, the day before, the field had settled to a median of 91°. The day verified at 89° against the MIA observations, with 1.29 in of precipitation — thunderstorms.
UKMO landed closest, off by 1.2°. GFS ran 5° warm.
What every model said, at every lead
Daily-high calls for Tue Sep 1 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 · 2026-08-21 | 86° | 89° | 87° | — | 93° | — | — | 86–93° |
| 10d · 2026-08-22 | 86° | 88° | 87° | — | 93° | — | — | 86–93° |
| 9d · 2026-08-23 | 85° | 89° | 85° | 92° | 96° | — | — | 85–96° |
| 8d · 2026-08-24 | 85° | 90° | 84° | 92° | 93° | — | — | 84–93° |
| 7d · 2026-08-25 | 86° | 90° | 84° | 91° | 93° | — | — | 84–93° |
| 6d · 2026-08-26 | 86° | 89° | 85° | 91° | 93° | 90° | 88° | 85–93° |
| 5d · 2026-08-27 | 85° | 90° | 88° | 92° | 92° | 96° | 91° | 85–96° |
| 4d · 2026-08-28 | 85° | 90° | 84° | 92° | 92° | 90° | 92° | 84–92° |
| 3d · 2026-08-29 | 85° | 91° | 86° | 92° | 93° | 88° | 85° | 85–93° |
| 2d · 2026-08-30 | 85° | 91° | 86° | 93° | 94° | 92° | 90° | 85–94° |
| 1d · 2026-08-31 | 86° | 91° | 85° | 92° | 94° | 91° | 90° | 85–94° |
| actual | 89° |
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. 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.