Was the forecast right for San Diego on Thu Oct 1?
San Diego, California · daily high temperature in °F · forecasts from each model's archived runs, verified against the SAN observations
14 days out, 4 models put San Diego's Thu Oct 1 high anywhere from 72° to 84°;by the final call, the day before, the field had settled to a median of 84°. The day verified at 78° against the SAN observations — cloudy.
GEM landed closest, off by 2.9°. ECMWF ran 12° warm.
What every model said, at every lead
Daily-high calls for Thu Oct 1 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 · 2026-09-16 | — | 85° | — | — | 82° | — | — | 82–85° |
| 14d · 2026-09-17 | 79° | 72° | 84° | — | 79° | — | — | 72–84° |
| 13d · 2026-09-18 | 80° | 95° | 80° | — | 71° | — | — | 71–95° |
| 12d · 2026-09-19 | 88° | 92° | 90° | — | 92° | — | — | 88–92° |
| 11d · 2026-09-20 | 78° | 73° | 90° | — | 74° | — | — | 73–90° |
| 10d · 2026-09-21 | 94° | 91° | 82° | — | 91° | — | — | 82–94° |
| 9d · 2026-09-22 | 91° | 89° | 78° | 86° | 81° | — | — | 78–91° |
| 8d · 2026-09-23 | 80° | 82° | 95° | 92° | 81° | — | — | 80–95° |
| 7d · 2026-09-24 | 80° | 78° | 81° | 84° | 74° | — | — | 74–84° |
| 6d · 2026-09-25 | 86° | 79° | 84° | 84° | 74° | 81° | 79° | 74–86° |
| 5d · 2026-09-26 | 85° | 84° | 88° | 85° | 80° | 81° | 90° | 80–90° |
| 4d · 2026-09-27 | 83° | 84° | 90° | 82° | 82° | 82° | 90° | 82–90° |
| 3d · 2026-09-28 | 83° | 82° | 90° | 81° | 81° | 81° | 86° | 81–90° |
| 2d · 2026-09-29 | 84° | 83° | 92° | 80° | 83° | 82° | 87° | 80–92° |
| 1d · 2026-09-30 | 84° | 84° | 90° | 81° | 84° | 82° | 85° | 81–90° |
| actual | 78° |
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.