Was the forecast right for Atlanta on Sun Aug 2?
Atlanta, Georgia · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
7 days out, 5 models put Atlanta's Sun Aug 2 high anywhere from 81° to 84°;by the final call, the day before, the field had settled to a median of 86°. The day verified at 88° against the ECMWF IFS analysis, with 0.22 in of precipitation — rain.
GFS landed closest, off by 0.8°. UKMO ran 5° warm.
What every model said, at every lead
Daily-high calls for Sun Aug 2 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 |
|---|---|---|---|---|---|---|---|---|
| 7d · 2026-07-26 | 82° | 82° | 81° | 84° | 83° | — | — | 81–84° |
| 6d · 2026-07-27 | 83° | 81° | 88° | 80° | 82° | 83° | 91° | 80–91° |
| 5d · 2026-07-28 | 83° | 82° | 85° | 77° | 87° | 79° | 90° | 77–90° |
| 4d · 2026-07-29 | 83° | 81° | 88° | 78° | 88° | 81° | 90° | 78–90° |
| 3d · 2026-07-30 | 84° | 84° | 85° | 79° | 80° | 80° | 90° | 79–90° |
| 2d · 2026-07-31 | 85° | 86° | 86° | 86° | 86° | 84° | 92° | 84–92° |
| 1d · 2026-08-01 | 85° | 85° | 86° | 85° | 89° | 87° | 93° | 85–93° |
| actual | 88° |
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 ECMWF IFS analysis (temperature_2m_max). 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.