Was the forecast right for Denver on Sat Aug 29?
Denver, Colorado · daily high temperature in °F · forecasts from each model's archived runs, verified against the DEN observations
5 days out, 7 models put Denver's Sat Aug 29 high anywhere from 88° to 96°;by the final call, the day before, the field had settled to a median of 90°. The day verified at 93° against the DEN observations — showers.
ICON landed closest, off by 1.3°. AIFS ran 4° cool.
What every model said, at every lead
Daily-high calls for Sat Aug 29 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 Denver scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 5d · 2026-08-24 | 88° | 88° | 96° | 94° | 93° | 90° | 95° | 88–96° |
| 4d · 2026-08-25 | 92° | 89° | 96° | 94° | 93° | 88° | 94° | 88–96° |
| 3d · 2026-08-26 | 91° | 88° | 95° | 94° | 93° | 91° | 94° | 88–95° |
| 2d · 2026-08-27 | 90° | 89° | 95° | 91° | 89° | 91° | 91° | 89–95° |
| 1d · 2026-08-28 | 89° | 90° | 95° | 91° | 90° | 92° | 90° | 89–95° |
| actual | 93° |
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 Denver — 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 DEN 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.