Was the forecast right for San Diego on Wed Sep 30?
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 Wed Sep 30 high anywhere from 26° to 26°;by the final call, the day before, the field had settled to a median of 26°. The day verified at 25° against the SAN observations — cloudy.
ICON landed closest, off by 0.2°. ECMWF ran 5° warm.
What every model said, at every lead
Daily-high calls for Wed Sep 30 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-15 | — | 26° | — | — | 29° | — | — | 26–29° |
| 14d · 2026-09-16 | 26° | 26° | 26° | — | 26° | — | — | 26–26° |
| 13d · 2026-09-17 | 25° | 22° | 26° | — | 27° | — | — | 22–27° |
| 12d · 2026-09-18 | 25° | 29° | 30° | — | 25° | — | — | 25–30° |
| 11d · 2026-09-19 | 35° | 32° | 37° | — | 32° | — | — | 32–37° |
| 10d · 2026-09-20 | 23° | 22° | 33° | — | 29° | — | — | 22–33° |
| 9d · 2026-09-21 | 33° | 37° | 29° | 28° | 31° | — | — | 28–37° |
| 8d · 2026-09-22 | 34° | 36° | 28° | 29° | 25° | — | — | 25–36° |
| 7d · 2026-09-23 | 27° | 32° | 37° | 34° | 26° | — | — | 26–37° |
| 6d · 2026-09-24 | 25° | 26° | 33° | 30° | 24° | 26° | 27° | 24–33° |
| 5d · 2026-09-25 | 30° | 26° | 27° | 30° | 25° | 26° | 26° | 25–30° |
| 4d · 2026-09-26 | 26° | 27° | 30° | 30° | 24° | 29° | 30° | 24–30° |
| 3d · 2026-09-27 | 26° | 27° | 31° | 28° | 24° | 28° | 28° | 24–31° |
| 2d · 2026-09-28 | 27° | 27° | 30° | 26° | 24° | 26° | 27° | 24–30° |
| 1d · 2026-09-29 | 27° | 27° | 30° | 26° | 25° | 25° | 26° | 25–30° |
| actual | 25° |
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.