Was the forecast right for Miami on Wed Aug 19?
Miami, Florida · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
14 days out, 4 models put Miami's Wed Aug 19 high anywhere from 87° to 91°;by the final call, the day before, the field had settled to a median of 94°. The day verified at 96° against the ECMWF IFS analysis, with 0.08 in of precipitation — thunderstorms.
AIGFS landed closest, off by 0.5°. AIFS ran 4° cool.
What every model said, at every lead
Daily-high calls for Wed Aug 19 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 · 2026-08-04 | — | 88° | — | — | 90° | — | — | 88–90° |
| 14d · 2026-08-05 | 88° | 88° | 87° | — | 91° | — | — | 87–91° |
| 13d · 2026-08-06 | 88° | 90° | 90° | — | 89° | — | — | 88–90° |
| 12d · 2026-08-07 | 89° | 87° | 90° | — | 89° | — | — | 87–90° |
| 11d · 2026-08-08 | 89° | 89° | 90° | — | 93° | — | — | 89–93° |
| 10d · 2026-08-09 | 88° | 90° | 95° | — | 89° | — | — | 88–95° |
| 9d · 2026-08-10 | 90° | 92° | 92° | 94° | 89° | — | — | 89–94° |
| 8d · 2026-08-11 | 90° | 93° | 90° | 92° | 90° | — | — | 90–93° |
| 7d · 2026-08-12 | 90° | 91° | 93° | 97° | 89° | — | — | 89–97° |
| 6d · 2026-08-13 | 92° | 96° | 94° | 98° | 90° | 92° | 95° | 90–98° |
| 5d · 2026-08-14 | 91° | 96° | 94° | 93° | 92° | 95° | 96° | 91–96° |
| 4d · 2026-08-15 | 91° | 95° | 94° | 93° | 93° | 96° | 94° | 91–96° |
| 3d · 2026-08-16 | 92° | 97° | 95° | 93° | 93° | 96° | 94° | 92–97° |
| 2d · 2026-08-17 | 92° | 98° | 94° | 93° | 93° | 97° | 94° | 92–98° |
| 1d · 2026-08-18 | 91° | 96° | 94° | 93° | 94° | 96° | 96° | 91–96° |
| actual | 96° |
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 ECMWF IFS analysis (temperature_2m_max). 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.