Was the forecast right for Atlanta on Tue Oct 20?
Atlanta, Georgia · daily high temperature in °F · forecasts from each model's archived runs, verified against the ATL observations
13 days out, 4 models put Atlanta's Tue Oct 20 high anywhere from 62° to 80°;by the final call, the day before, the field had settled to a median of 73°. The day verified at 76° against the ATL observations — clear.
GFS landed closest, off by 0.1°. UKMO ran 5° cool.
What every model said, at every lead
Daily-high calls for Tue Oct 20 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-10-05 | — | 76° | — | — | 76° | — | — | 76–76° |
| 14d · 2026-10-06 | 66° | 77° | — | — | 74° | — | — | 66–77° |
| 13d · 2026-10-07 | 68° | 73° | 62° | — | 80° | — | — | 62–80° |
| 12d · 2026-10-08 | 61° | 76° | 63° | — | 74° | — | — | 61–76° |
| 11d · 2026-10-09 | 72° | 70° | 74° | — | 69° | — | — | 69–74° |
| 10d · 2026-10-10 | 72° | 66° | 71° | — | 67° | — | — | 66–72° |
| 9d · 2026-10-11 | 76° | 72° | 74° | 70° | 74° | — | — | 70–76° |
| 8d · 2026-10-12 | — | 75° | 73° | 68° | 74° | — | — | 68–75° |
| 7d · 2026-10-13 | 73° | 78° | 73° | 73° | 72° | — | — | 72–78° |
| 6d · 2026-10-14 | 70° | 73° | 73° | 73° | 74° | 72° | 70° | 70–74° |
| 5d · 2026-10-15 | 73° | 70° | 72° | 72° | 77° | 74° | 69° | 69–77° |
| 4d · 2026-10-16 | 75° | 72° | 73° | 72° | 76° | 76° | 68° | 68–76° |
| 3d · 2026-10-17 | 75° | 74° | 74° | 71° | 76° | 76° | 72° | 71–76° |
| 2d · 2026-10-18 | 74° | 74° | 72° | 71° | 76° | 75° | 71° | 71–76° |
| 1d · 2026-10-19 | 73° | 73° | 73° | 71° | 76° | 73° | 71° | 71–76° |
| actual | 76° |
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. 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.