Was the forecast right for Denver on Fri Oct 9?
Denver, Colorado · daily high temperature in °F · forecasts from each model's archived runs, verified against the DEN observations
14 days out, 4 models put Denver's Fri Oct 9 high anywhere from 71° to 85°;by the final call, the day before, the field had settled to a median of 85°. The day verified at 86° against the DEN observations — partly cloudy.
AIFS landed closest, off by 0.2°. AIGFS ran 3° cool.
What every model said, at every lead
Daily-high calls for Fri Oct 9 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-24 | — | 74° | — | — | 77° | — | — | 74–77° |
| 14d · 2026-09-25 | 85° | 71° | 78° | — | 76° | — | — | 71–85° |
| 13d · 2026-09-26 | 82° | 72° | 76° | — | 81° | — | — | 72–82° |
| 12d · 2026-09-27 | 83° | 67° | 67° | — | 65° | — | — | 65–83° |
| 11d · 2026-09-28 | 84° | 82° | 74° | — | 73° | — | — | 73–84° |
| 10d · 2026-09-29 | 84° | 76° | 83° | — | 75° | — | — | 75–84° |
| 9d · 2026-09-30 | 84° | 79° | 83° | 80° | 85° | — | — | 79–85° |
| 8d · 2026-10-01 | 86° | 83° | 84° | 81° | 82° | — | — | 81–86° |
| 7d · 2026-10-02 | 82° | 83° | 84° | 81° | 84° | — | — | 81–84° |
| 6d · 2026-10-03 | 82° | 81° | 82° | 82° | 82° | 81° | 74° | 74–82° |
| 5d · 2026-10-04 | 83° | 78° | 83° | 78° | 74° | 79° | 80° | 74–83° |
| 4d · 2026-10-05 | 85° | 79° | 86° | 83° | 83° | 83° | 86° | 79–86° |
| 3d · 2026-10-06 | 84° | 81° | 85° | 84° | 83° | 82° | 86° | 81–86° |
| 2d · 2026-10-07 | 86° | 83° | 85° | 83° | 85° | 84° | 86° | 83–86° |
| 1d · 2026-10-08 | 86° | 83° | 85° | 84° | 85° | 84° | 85° | 83–86° |
| actual | 86° |
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.