Was the forecast right for Denver on Wed Oct 21?
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 Wed Oct 21 high anywhere from 41° to 70°;by the final call, the day before, the field had settled to a median of 75°. The day verified at 75° against the DEN observations — cloudy.
ICON landed closest, off by 0.2°. AIGFS ran 5° cool.
What every model said, at every lead
Daily-high calls for Wed Oct 21 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 · 2026-10-06 | — | 74° | — | — | 69° | — | — | 69–74° |
| 14d · 2026-10-07 | 67° | 57° | 41° | — | 70° | — | — | 41–70° |
| 13d · 2026-10-08 | 57° | 41° | 54° | — | 64° | — | — | 41–64° |
| 12d · 2026-10-09 | 60° | 53° | 62° | — | 54° | — | — | 53–62° |
| 11d · 2026-10-10 | 60° | 58° | 73° | — | 69° | — | — | 58–73° |
| 10d · 2026-10-11 | 56° | 66° | 72° | — | 49° | — | — | 49–72° |
| 9d · 2026-10-12 | — | 63° | 77° | 59° | 76° | — | — | 59–77° |
| 8d · 2026-10-13 | 48° | 72° | 73° | 69° | 70° | — | — | 48–73° |
| 7d · 2026-10-14 | 71° | 74° | 73° | 72° | 72° | — | — | 71–74° |
| 6d · 2026-10-15 | 72° | 73° | 77° | 71° | 71° | 73° | 64° | 64–77° |
| 5d · 2026-10-16 | 71° | 68° | 75° | 73° | 74° | 73° | 68° | 68–75° |
| 4d · 2026-10-17 | 72° | 72° | 76° | 74° | 76° | 73° | 74° | 72–76° |
| 3d · 2026-10-18 | 73° | 71° | 78° | 75° | 74° | 73° | 75° | 71–78° |
| 2d · 2026-10-19 | 73° | 70° | 77° | 76° | 76° | 75° | 77° | 70–77° |
| 1d · 2026-10-20 | 73° | 70° | 77° | 76° | 74° | 75° | 76° | 70–77° |
| actual | 75° |
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.