Was the forecast right for Phoenix on Mon Oct 26?
Phoenix, Arizona · daily high temperature in °F · forecasts from each model's archived runs, verified against the PHX observations
13 days out, 4 models put Phoenix's Mon Oct 26 high anywhere from 71° to 86°;by the final call, the day before, the field had settled to a median of 82°. The day verified at 86° against the PHX observations — clear.
ECMWF landed closest, off by 1.6°. AIGFS ran 6° cool.
What every model said, at every lead
Daily-high calls for Mon Oct 26 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 Phoenix scoreboard shows them, labeled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-10-11 | — | 78° | — | — | 82° | — | — | 78–82° |
| 14d · 2026-10-12 | — | 84° | 87° | — | 89° | — | — | 84–89° |
| 13d · 2026-10-13 | 86° | 79° | 71° | — | 82° | — | — | 71–86° |
| 12d · 2026-10-14 | 82° | 76° | 82° | — | 80° | — | — | 76–82° |
| 11d · 2026-10-15 | 80° | 73° | 79° | — | 78° | — | — | 73–80° |
| 10d · 2026-10-16 | 77° | 80° | 85° | — | 83° | — | — | 77–85° |
| 9d · 2026-10-17 | 82° | 80° | 92° | 79° | 81° | — | — | 79–92° |
| 8d · 2026-10-18 | 82° | 85° | 89° | 81° | 82° | — | — | 81–89° |
| 7d · 2026-10-19 | 82° | 84° | 87° | 80° | 87° | — | — | 80–87° |
| 6d · 2026-10-20 | 83° | 83° | 84° | 77° | 86° | 82° | 84° | 77–86° |
| 5d · 2026-10-21 | 81° | 83° | 84° | 81° | 85° | 83° | 77° | 77–85° |
| 4d · 2026-10-22 | 82° | 82° | 82° | 79° | 84° | 82° | 82° | 79–84° |
| 3d · 2026-10-23 | 83° | 82° | 83° | 82° | 82° | 83° | 82° | 82–83° |
| 2d · 2026-10-24 | 83° | 81° | 84° | 82° | 82° | 83° | 82° | 81–84° |
| 1d · 2026-10-25 | 83° | 80° | 84° | 82° | 82° | 82° | 83° | 80–84° |
| 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 Phoenix — 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 PHX observations. The actual values are the ones in hand when this day was verified, usually 2 days after the date; a correction published after that is not carried into it. Archive depth varies by city; verified days exist only for dates the archive watched arrive.