Was the forecast right for San Diego on Tue Sep 8?
San Diego, California · daily high temperature in °C · forecasts from each model's archived runs, verified against the SAN observations
14 days out, 4 models put San Diego's Tue Sep 8 high anywhere from 25° to 35°;by the final call, the day before, the field had settled to a median of 34°. The day verified at 34° against the SAN observations — drizzle.
AIGFS landed closest, off by 0.4°. ECMWF ran 5° warm.
What every model said, at every lead
Daily-high calls for Tue Sep 8 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 |
|---|---|---|---|---|---|---|---|---|
| 14d · 2026-08-25 | 25° | 28° | 35° | — | 25° | — | — | 25–35° |
| 13d · 2026-08-26 | 30° | 26° | 34° | — | 29° | — | — | 26–34° |
| 12d · 2026-08-27 | 30° | 26° | 34° | — | 25° | — | — | 25–34° |
| 11d · 2026-08-28 | 28° | 30° | 33° | — | 26° | — | — | 26–33° |
| 10d · 2026-08-29 | 29° | 31° | 33° | — | 30° | — | — | 29–33° |
| 9d · 2026-08-30 | 30° | 31° | 35° | 25° | 28° | — | — | 25–35° |
| 8d · 2026-08-31 | 28° | 29° | 32° | 28° | 27° | — | — | 27–32° |
| 7d · 2026-09-01 | 30° | 28° | 33° | 26° | 28° | — | — | 26–33° |
| 6d · 2026-09-02 | 31° | 28° | 34° | 29° | 26° | 28° | 30° | 26–34° |
| 5d · 2026-09-03 | 34° | 32° | 36° | 30° | 28° | 29° | 30° | 28–36° |
| 4d · 2026-09-04 | 35° | 32° | 37° | 30° | 29° | 31° | 31° | 29–37° |
| 3d · 2026-09-05 | 35° | 34° | 36° | 30° | 31° | 33° | 34° | 30–36° |
| 2d · 2026-09-06 | 34° | 35° | 37° | 32° | 31° | 33° | 36° | 31–37° |
| 1d · 2026-09-07 | 35° | 34° | 38° | 33° | 31° | 35° | 33° | 31–38° |
| actual | 34° |
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. 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.