Was the forecast right for Charlotte on Mon Aug 31?
Charlotte, North Carolina · daily high temperature in °F · forecasts from each model's archived runs, verified against the CLT observations
10 days out, 4 models put Charlotte's Mon Aug 31 high anywhere from 80° to 98°;by the final call, the day before, the field had settled to a median of 93°. The day verified at 92° against the CLT observations — partly cloudy.
AIFS landed closest, off by 0.0°. GFS ran 4° warm.
What every model said, at every lead
Daily-high calls for Mon Aug 31 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 |
|---|---|---|---|---|---|---|---|---|
| 10d · 2026-08-21 | 86° | 93° | 80° | — | 98° | — | — | 80–98° |
| 9d · 2026-08-22 | 90° | 89° | 87° | 86° | 81° | — | — | 81–90° |
| 8d · 2026-08-23 | 87° | 94° | 92° | 78° | 94° | — | — | 78–94° |
| 7d · 2026-08-24 | 90° | 91° | 94° | 86° | 94° | — | — | 86–94° |
| 6d · 2026-08-25 | 90° | 91° | 89° | 88° | 94° | 88° | 90° | 88–94° |
| 5d · 2026-08-26 | 89° | 93° | 92° | 90° | 98° | 92° | 90° | 89–98° |
| 4d · 2026-08-27 | 91° | 90° | 91° | 90° | 97° | 94° | 82° | 82–97° |
| 3d · 2026-08-28 | 92° | 93° | 93° | 91° | 97° | 95° | 89° | 89–97° |
| 2d · 2026-08-29 | 92° | 94° | 95° | 92° | 96° | 95° | 90° | 90–96° |
| 1d · 2026-08-30 | 92° | 93° | 93° | 95° | 96° | 92° | 89° | 89–96° |
| actual | 92° |
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.