Was the forecast right for San Antonio on Thu Sep 3?
San Antonio, Texas · daily high temperature in °F · forecasts from each model's archived runs, verified against the SAT observations
9 days out, 4 models put San Antonio's Thu Sep 3 high anywhere from 98° to 102°; by the final call the field had settled to a median of 101°. The day verified at 100° against the SAT observations — thunderstorms.
GEM landed closest, off by 0.2°. AIFS ran 3° cold.
What every model said, at every lead
Daily-high calls for Thu Sep 3 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 San Antonio scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 9d · 2026-08-25 | 99° | 98° | 98° | — | 102° | — | — | 98–102° |
| 8d · 2026-08-26 | 100° | 99° | 98° | 98° | 98° | — | — | 98–100° |
| 7d · 2026-08-27 | 99° | 98° | 97° | 96° | 102° | — | — | 96–102° |
| 6d · 2026-08-28 | 99° | 98° | 99° | 96° | 101° | 99° | — | 96–101° |
| 5d · 2026-08-29 | 100° | 97° | 100° | 98° | 99° | 95° | 98° | 95–100° |
| 4d · 2026-08-30 | 99° | 93° | 101° | 100° | 86° | 101° | 97° | 86–101° |
| 3d · 2026-08-31 | 99° | 99° | 101° | 96° | 101° | 103° | 98° | 96–103° |
| 2d · 2026-09-01 | 96° | 98° | 101° | 98° | 99° | 103° | 95° | 95–103° |
| 1d · 2026-09-02 | 97° | 98° | 102° | 99° | 100° | 100° | 101° | 97–102° |
| 0d · 2026-09-03 | 97° | 100° | 101° | 100° | 101° | 101° | 102° | 97–102° |
| actual | 100° |
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 San Antonio — 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 SAT observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.