Was the forecast right for San Diego on Sun Sep 6?
San Diego, California · daily high temperature in °F · forecasts from each model's archived runs, verified against the SAN observations
12 days out, 4 models put San Diego's Sun Sep 6 high anywhere from 74° to 93°; by the final call the field had settled to a median of 88°. The day verified at 95° against the SAN observations — drizzle.
UKMO landed closest, off by 0.8°. GEM ran 9° cold.
What every model said, at every lead
Daily-high calls for Sun Sep 6 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 Diego scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 12d · 2026-08-25 | 85° | 77° | 93° | — | 74° | — | — | 74–93° |
| 11d · 2026-08-26 | 79° | 74° | 91° | — | 78° | — | — | 74–91° |
| 10d · 2026-08-27 | 85° | 83° | 95° | — | 75° | — | — | 75–95° |
| 9d · 2026-08-28 | 88° | 79° | 92° | — | 84° | — | — | 79–92° |
| 8d · 2026-08-29 | 85° | 89° | 93° | 80° | 76° | — | — | 76–93° |
| 7d · 2026-08-30 | 86° | 87° | 99° | 87° | 86° | — | — | 86–99° |
| 6d · 2026-08-31 | 87° | 90° | 93° | 85° | 76° | 96° | — | 76–96° |
| 5d · 2026-09-01 | 85° | 88° | 94° | 84° | 82° | 88° | 91° | 82–94° |
| 4d · 2026-09-02 | 88° | 85° | 86° | 82° | 79° | 86° | 89° | 79–89° |
| 3d · 2026-09-03 | 88° | 84° | 91° | 86° | 80° | 82° | 85° | 80–91° |
| 2d · 2026-09-04 | 88° | 86° | 95° | 84° | 82° | 84° | 91° | 82–95° |
| 1d · 2026-09-05 | 85° | 88° | 91° | 85° | 82° | 86° | 96° | 82–96° |
| 0d · 2026-09-06 | 88° | 92° | 92° | 86° | 88° | 88° | 94° | 86–94° |
| actual | 95° |
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 Diego — 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 SAN observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.