Was the forecast right for Houston on Thu Sep 17?
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 Thu Sep 17 high anywhere from 89° to 97°; by the final call the field had settled to a median of 89°. The day verified at 88° against the HOU observations, with 0.05 in of precipitation — thunderstorms.
ICON landed closest, off by 0.2°. GEM ran 6° hot.
What every model said, at every lead
Daily-high calls for Thu Sep 17 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 · 2026-09-02 | — | 89° | — | — | 98° | — | — | 89–98° |
| 14d · 2026-09-03 | 94° | 96° | — | — | 100° | — | — | 94–100° |
| 13d · 2026-09-04 | 92° | 89° | 97° | — | 96° | — | — | 89–97° |
| 12d · 2026-09-05 | 90° | 95° | 91° | — | 95° | — | — | 90–95° |
| 11d · 2026-09-06 | 90° | 95° | 90° | — | 81° | — | — | 81–95° |
| 10d · 2026-09-07 | 89° | 94° | 87° | — | 94° | — | — | 87–94° |
| 9d · 2026-09-08 | 92° | 95° | 87° | — | 93° | — | — | 87–95° |
| 8d · 2026-09-09 | 91° | 95° | 93° | 94° | 96° | — | — | 91–96° |
| 7d · 2026-09-10 | 89° | 95° | 90° | 91° | 94° | — | — | 89–95° |
| 6d · 2026-09-11 | 91° | 94° | 91° | 92° | 93° | 94° | — | 91–94° |
| 5d · 2026-09-12 | 90° | 88° | 90° | 93° | 93° | 86° | 90° | 86–93° |
| 4d · 2026-09-13 | 89° | 91° | 91° | 92° | 94° | 93° | 94° | 89–94° |
| 3d · 2026-09-14 | 90° | 93° | 88° | 89° | 92° | 92° | 95° | 88–95° |
| 2d · 2026-09-15 | 89° | 88° | 87° | 91° | 90° | 92° | 88° | 87–92° |
| 1d · 2026-09-16 | 89° | 91° | 88° | 93° | 90° | 88° | 87° | 87–93° |
| 0d · 2026-09-17 | 86° | 92° | 89° | 94° | 90° | 88° | 89° | 86–94° |
| actual | 88° |
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.