Was the forecast right for Los Angeles on Wed Aug 19?
Los Angeles, California · daily high temperature in °C · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
14 days out, 4 models put Los Angeles's Wed Aug 19 high anywhere from 24° to 30°; by the final call the field had settled to a median of 34°. The day verified at 36° against the ECMWF IFS analysis — cloudy.
ECMWF landed closest, off by 0.7°. AIGFS ran 8° cold.
What every model said, at every lead
Daily-high calls for Wed Aug 19 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 · 2026-08-04 | — | 22° | — | — | 33° | — | — | 22–33° |
| 14d · 2026-08-05 | 27° | 24° | 30° | — | 30° | — | — | 24–30° |
| 13d · 2026-08-06 | 27° | 28° | 29° | — | 31° | — | — | 27–31° |
| 12d · 2026-08-07 | 26° | 26° | 29° | — | 29° | — | — | 26–29° |
| 11d · 2026-08-08 | 33° | 26° | 31° | — | 32° | — | — | 26–33° |
| 10d · 2026-08-09 | 26° | 23° | 26° | — | 34° | — | — | 23–34° |
| 9d · 2026-08-10 | 27° | 29° | 34° | — | 32° | — | — | 27–34° |
| 8d · 2026-08-11 | 31° | 29° | 26° | 27° | 32° | — | — | 26–32° |
| 7d · 2026-08-12 | 32° | 30° | 28° | 33° | 33° | — | — | 28–33° |
| 6d · 2026-08-13 | 32° | 27° | 31° | 33° | 34° | 28° | — | 27–34° |
| 5d · 2026-08-14 | 32° | 26° | 32° | 33° | 35° | 29° | 33° | 26–35° |
| 4d · 2026-08-15 | 31° | 28° | 36° | 33° | 34° | 30° | 33° | 28–36° |
| 3d · 2026-08-16 | 31° | 27° | 34° | 34° | 35° | 32° | 33° | 27–35° |
| 2d · 2026-08-17 | 31° | 26° | 34° | 33° | 35° | 31° | 32° | 26–35° |
| 1d · 2026-08-18 | 31° | 27° | 34° | 33° | 36° | 31° | 33° | 27–36° |
| 0d · 2026-08-19 | 31° | 28° | 35° | 34° | 34° | 32° | 34° | 28–35° |
| actual | 36° |
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 ECMWF IFS analysis (temperature_2m_max). Archive depth varies by city; receipts exist only for dates the archive watched arrive.