Was the forecast right for Charlotte on Sun Sep 6?
Charlotte, North Carolina · daily high temperature in °F · forecasts from each model's archived runs, verified against the CLT observations
13 days out, 4 models put Charlotte's Sun Sep 6 high anywhere from 67° to 91°; by the final call the field had settled to a median of 89°. The day verified at 87° against the CLT observations, with 0.01 in of precipitation — thunderstorms.
AIFS landed closest, off by 1.0°. GFS ran 6° hot.
What every model said, at every lead
Daily-high calls for Sun Sep 6 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 Charlotte scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-22 | — | 83° | — | — | 88° | — | — | 83–88° |
| 14d · 2026-08-23 | 83° | 84° | — | — | 76° | — | — | 76–84° |
| 13d · 2026-08-24 | 89° | 91° | 90° | — | 67° | — | — | 67–91° |
| 12d · 2026-08-25 | 85° | 93° | 96° | — | 88° | — | — | 85–96° |
| 11d · 2026-08-26 | 92° | 81° | 97° | — | 92° | — | — | 81–97° |
| 10d · 2026-08-27 | 90° | 98° | 96° | — | 89° | — | — | 89–98° |
| 9d · 2026-08-28 | 83° | 88° | 91° | — | 101° | — | — | 83–101° |
| 8d · 2026-08-29 | 83° | 89° | 88° | 90° | 96° | — | — | 83–96° |
| 7d · 2026-08-30 | 79° | 82° | 81° | 86° | 81° | — | — | 79–86° |
| 6d · 2026-08-31 | 82° | 82° | 82° | 85° | 78° | 86° | — | 78–86° |
| 5d · 2026-09-01 | 86° | 85° | 90° | 87° | 78° | 92° | 92° | 78–92° |
| 4d · 2026-09-02 | 82° | 85° | 85° | 81° | 92° | 80° | 86° | 80–92° |
| 3d · 2026-09-03 | 87° | 88° | 84° | 81° | 87° | 83° | 84° | 81–88° |
| 2d · 2026-09-04 | 85° | 89° | 90° | 85° | 93° | 88° | 83° | 83–93° |
| 1d · 2026-09-05 | 88° | 89° | 87° | 86° | 93° | 86° | 85° | 85–93° |
| 0d · 2026-09-06 | 86° | 89° | 90° | 91° | 93° | 83° | 86° | 83–93° |
| actual | 87° |
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 Charlotte — 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 CLT observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.