Was the forecast right for Atlanta on Fri Aug 28?
Atlanta, Georgia · daily high temperature in °C · forecasts from each model's archived runs, verified against the ATL observations
6 days out, 6 models put Atlanta's Fri Aug 28 high anywhere from 22° to 33°; by the final call the field had settled to a median of 32°. The day verified at 34° against the ATL observations — showers.
GFS landed closest, off by 0.6°. AIFS ran 3° cold.
What every model said, at every lead
Daily-high calls for Fri Aug 28 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 Atlanta scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 6d · 2026-08-22 | 30° | 30° | 30° | 22° | 33° | 28° | — | 22–33° |
| 5d · 2026-08-23 | 30° | 30° | 31° | 29° | 32° | 34° | 32° | 29–34° |
| 4d · 2026-08-24 | 30° | 30° | 29° | 30° | 31° | 33° | 31° | 29–33° |
| 3d · 2026-08-25 | 29° | 29° | 30° | 26° | 30° | 26° | 31° | 26–31° |
| 2d · 2026-08-26 | 30° | 31° | 33° | 30° | 27° | 31° | 35° | 27–35° |
| 1d · 2026-08-27 | 30° | 31° | 32° | 29° | 32° | 32° | 31° | 29–32° |
| 0d · 2026-08-28 | 30° | 32° | 32° | 31° | 34° | 31° | 32° | 30–34° |
| actual | 34° |
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 Atlanta — 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 ATL observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.