Was the forecast right for Houston on Wed Sep 9?
Houston, Texas · daily high temperature in °F · forecasts from each model's archived runs, verified against the HOU observations
13 days out, 4 models put Houston's Wed Sep 9 high anywhere from 89° to 100°; by the final call the field had settled to a median of 92°. The day verified at 91° against the HOU observations — thunderstorms.
ICON landed closest, off by 0.5°. ECMWF ran 3° cold.
What every model said, at every lead
Daily-high calls for Wed Sep 9 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 Houston scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-25 | — | 91° | — | — | 93° | — | — | 91–93° |
| 14d · 2026-08-26 | 94° | 92° | — | — | 103° | — | — | 92–103° |
| 13d · 2026-08-27 | 95° | 98° | 89° | — | 100° | — | — | 89–100° |
| 12d · 2026-08-28 | 93° | 93° | 88° | — | 103° | — | — | 88–103° |
| 11d · 2026-08-29 | 92° | 100° | 90° | — | 96° | — | — | 90–100° |
| 10d · 2026-08-30 | 89° | 93° | 86° | — | 97° | — | — | 86–97° |
| 9d · 2026-08-31 | 88° | 93° | 86° | — | 98° | — | — | 86–98° |
| 8d · 2026-09-01 | 89° | 96° | 88° | 95° | 100° | — | — | 88–100° |
| 7d · 2026-09-02 | 87° | 94° | 83° | 89° | 98° | — | — | 83–98° |
| 6d · 2026-09-03 | 91° | 90° | 86° | 91° | 96° | 94° | — | 86–96° |
| 5d · 2026-09-04 | 89° | 90° | 87° | 92° | 96° | 89° | 96° | 87–96° |
| 4d · 2026-09-05 | 89° | 93° | 90° | 90° | 98° | 93° | 87° | 87–98° |
| 3d · 2026-09-06 | 89° | 95° | 89° | 92° | 96° | 93° | 92° | 89–96° |
| 2d · 2026-09-07 | 90° | 93° | 86° | 88° | 92° | 93° | 90° | 86–93° |
| 1d · 2026-09-08 | 90° | 92° | 89° | 94° | 91° | 91° | 90° | 89–94° |
| 0d · 2026-09-09 | 90° | 92° | 88° | 92° | 92° | 92° | 92° | 88–92° |
| actual | 91° |
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 Houston — 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 HOU observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.