Was the forecast right for Los Angeles on Wed Sep 23?
Los Angeles, California · daily high temperature in °F · forecasts from each model's archived runs, verified against the FHMC1 observations
14 days out, 4 models put Los Angeles's Wed Sep 23 high anywhere from 79° to 92°;by the final call, the day before, the field had settled to a median of 87°. The day verified at 87° against the FHMC1 observations — cloudy.
GFS landed closest, off by 0.1°. AIGFS ran 9° cool.
What every model said, at every lead
Daily-high calls for Wed Sep 23 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 Los Angeles scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-08 | — | 70° | — | — | 81° | — | — | 70–81° |
| 14d · 2026-09-09 | 92° | 79° | 87° | — | 86° | — | — | 79–92° |
| 13d · 2026-09-10 | 77° | 76° | 78° | — | 83° | — | — | 76–83° |
| 12d · 2026-09-11 | 76° | 73° | 81° | — | 88° | — | — | 73–88° |
| 11d · 2026-09-12 | 76° | 72° | 85° | — | 84° | — | — | 72–85° |
| 10d · 2026-09-13 | 76° | 75° | 76° | — | 76° | — | — | 75–76° |
| 9d · 2026-09-14 | 76° | 80° | 75° | — | 81° | — | — | 75–81° |
| 8d · 2026-09-15 | 80° | 77° | 79° | 95° | 88° | — | — | 77–95° |
| 7d · 2026-09-16 | 78° | 78° | 79° | 88° | 84° | — | — | 78–88° |
| 6d · 2026-09-17 | 80° | 78° | 78° | 90° | 87° | 85° | 87° | 78–90° |
| 5d · 2026-09-18 | 78° | 73° | 89° | 86° | 81° | 89° | 98° | 73–98° |
| 4d · 2026-09-19 | 80° | 74° | 90° | 85° | 84° | 96° | 87° | 74–96° |
| 3d · 2026-09-20 | 82° | 75° | 92° | 89° | 85° | 93° | 84° | 75–93° |
| 2d · 2026-09-21 | 83° | 77° | 90° | 92° | 87° | 98° | 85° | 77–98° |
| 1d · 2026-09-22 | 82° | 78° | 91° | 92° | 87° | 95° | 86° | 78–95° |
| actual | 87° |
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 Los Angeles — 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 FHMC1 observations. The actual values are the ones in hand when this receipt was settled, usually 4 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.