Was the forecast right for San Diego on Sun Oct 4?
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 Sun Oct 4 high anywhere from 24° to 36°;by the final call, the day before, the field had settled to a median of 37°. The day verified at 38° against the SAN observations — clear.
UKMO landed closest, off by 0.2°. GFS ran 5° cool.
What every model said, at every lead
Daily-high calls for Sun Oct 4 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 · 2026-09-19 | — | 26° | — | — | 28° | — | — | 26–28° |
| 14d · 2026-09-20 | 36° | 24° | 27° | — | 30° | — | — | 24–36° |
| 13d · 2026-09-21 | 27° | 27° | 37° | — | 35° | — | — | 27–37° |
| 12d · 2026-09-22 | 28° | 36° | 37° | — | 34° | — | — | 28–37° |
| 11d · 2026-09-23 | 28° | 29° | 33° | — | 30° | — | — | 28–33° |
| 10d · 2026-09-24 | 27° | 34° | 33° | — | 29° | — | — | 27–34° |
| 9d · 2026-09-25 | 30° | 34° | 31° | 28° | 30° | — | — | 28–34° |
| 8d · 2026-09-26 | 33° | 33° | 34° | 30° | 30° | — | — | 30–34° |
| 7d · 2026-09-27 | 34° | 40° | 31° | 33° | 34° | — | — | 31–40° |
| 6d · 2026-09-28 | 34° | 40° | 40° | 36° | 36° | 39° | 36° | 34–40° |
| 5d · 2026-09-29 | 34° | 36° | 39° | 36° | 36° | 41° | 37° | 34–41° |
| 4d · 2026-09-30 | 36° | 38° | 39° | 35° | 33° | 38° | 36° | 33–39° |
| 3d · 2026-10-01 | 36° | 40° | 40° | 38° | 33° | 39° | 38° | 33–40° |
| 2d · 2026-10-02 | 35° | 40° | 40° | 36° | 37° | 36° | 39° | 35–40° |
| 1d · 2026-10-03 | 37° | 39° | 40° | 36° | 33° | 36° | 38° | 33–40° |
| actual | 38° |
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.