Was the forecast right for Charlotte on Wed Sep 2?
Charlotte, North Carolina · daily high temperature in °F · forecasts from each model's archived runs, verified against the CLT observations
12 days out, 4 models put Charlotte's Wed Sep 2 high anywhere from 92° to 100°;by the final call, the day before, the field had settled to a median of 98°. The day verified at 97° against the CLT observations — drizzle.
AIFS landed closest, off by 0.4°. GFS ran 4° warm.
What every model said, at every lead
Daily-high calls for Wed Sep 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 Charlotte scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 12d · 2026-08-21 | 92° | 93° | 92° | — | 100° | — | — | 92–100° |
| 11d · 2026-08-22 | 93° | 89° | 86° | — | 96° | — | — | 86–96° |
| 10d · 2026-08-23 | 94° | 96° | 86° | — | 85° | — | — | 85–96° |
| 9d · 2026-08-24 | 94° | 95° | 99° | 90° | 100° | — | — | 90–100° |
| 8d · 2026-08-25 | 93° | 95° | 93° | 89° | 99° | — | — | 89–99° |
| 7d · 2026-08-26 | 89° | 95° | 96° | 93° | 102° | — | — | 89–102° |
| 6d · 2026-08-27 | 93° | 93° | 95° | 93° | 101° | 94° | 89° | 89–101° |
| 5d · 2026-08-28 | 95° | 97° | 96° | 95° | 100° | 97° | 90° | 90–100° |
| 4d · 2026-08-29 | 96° | 97° | 99° | 95° | 100° | 98° | 92° | 92–100° |
| 3d · 2026-08-30 | 96° | 96° | 100° | 95° | 101° | 98° | 93° | 93–101° |
| 2d · 2026-08-31 | 97° | 98° | 100° | 97° | 101° | 96° | 94° | 94–101° |
| 1d · 2026-09-01 | 97° | 98° | 98° | 99° | 101° | 96° | 95° | 95–101° |
| actual | 97° |
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. 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.