Was the forecast right for Los Angeles on Wed Aug 12?
Los Angeles, California · daily high temperature in °F · forecasts from each model's archived runs, verified against ERA5
13 days out, 4 models put Los Angeles's Wed Aug 12 high anywhere from 78° to 91°; by the final call the field had settled to a median of 84°. ERA5 says the day verified at 89° — cloudy.
GFS landed closest, off by 3.1°. AIGFS ran 12° cold.
What every model said, at every lead
Daily-high calls for Wed Aug 12 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 · 2026-07-28 | — | 72° | — | — | 93° | — | — | 72–93° |
| 14d · 2026-07-29 | 84° | 80° | — | — | 87° | — | — | 80–87° |
| 13d · 2026-07-30 | 80° | 78° | 84° | — | 91° | — | — | 78–91° |
| 12d · 2026-07-31 | 81° | 74° | 81° | — | 86° | — | — | 74–86° |
| 11d · 2026-08-01 | 79° | 75° | 82° | — | 85° | — | — | 75–85° |
| 10d · 2026-08-02 | 82° | 77° | 82° | — | 87° | — | — | 77–87° |
| 9d · 2026-08-03 | 82° | 76° | 82° | — | 88° | — | — | 76–88° |
| 8d · 2026-08-04 | 82° | 78° | 86° | 90° | 90° | — | — | 78–90° |
| 7d · 2026-08-05 | 82° | 79° | 85° | 91° | 90° | — | — | 79–91° |
| 6d · 2026-08-06 | 82° | 80° | 85° | 88° | 90° | 83° | — | 80–90° |
| 5d · 2026-08-07 | 83° | 79° | 87° | 87° | 90° | 84° | 87° | 79–90° |
| 4d · 2026-08-08 | 82° | 78° | 86° | 88° | 89° | 82° | 86° | 78–89° |
| 3d · 2026-08-09 | 82° | 76° | 85° | 87° | 86° | 83° | 85° | 76–87° |
| 2d · 2026-08-10 | 82° | 77° | 85° | 85° | 85° | 81° | 82° | 77–85° |
| 1d · 2026-08-11 | 81° | 78° | 84° | 84° | 81° | 81° | 84° | 78–84° |
| 0d · 2026-08-12 | 81° | 76° | 85° | 85° | 86° | 81° | 84° | 76–86° |
| actual | 89° |
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 ERA5 reanalysis (temperature_2m_max). Archive depth varies by city; receipts exist only for dates the archive watched arrive.