Was the forecast right for Phoenix on Mon Oct 12?
Phoenix, Arizona · daily high temperature in °F · forecasts from each model's archived runs, verified against the PHX observations
14 days out, 4 models put Phoenix's Mon Oct 12 high anywhere from 89° to 99°;by the final call, the day before, the field had settled to a median of 80°. The day verified at 83° against the PHX observations, with 0.05 in of precipitation — drizzle.
GFS landed closest, off by 1.1°. ECMWF ran 7° cool.
What every model said, at every lead
Daily-high calls for Mon Oct 12 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, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-27 | — | 95° | — | — | 90° | — | — | 90–95° |
| 14d · 2026-09-28 | 99° | 91° | 97° | — | 89° | — | — | 89–99° |
| 13d · 2026-09-29 | 100° | 96° | 98° | — | 91° | — | — | 91–100° |
| 12d · 2026-09-30 | 86° | 89° | 99° | — | 96° | — | — | 86–99° |
| 11d · 2026-10-01 | 97° | 96° | 96° | — | 93° | — | — | 93–97° |
| 10d · 2026-10-02 | 76° | 86° | 84° | — | 96° | — | — | 76–96° |
| 9d · 2026-10-03 | 77° | 90° | 88° | 93° | 94° | — | — | 77–94° |
| 8d · 2026-10-04 | 78° | 91° | 78° | 93° | 93° | — | — | 78–93° |
| 7d · 2026-10-05 | 78° | 90° | 77° | 82° | 82° | — | — | 77–90° |
| 6d · 2026-10-06 | 84° | 78° | 83° | 84° | 87° | 82° | — | 78–87° |
| 5d · 2026-10-07 | 82° | 80° | 82° | 75° | 87° | 86° | 85° | 75–87° |
| 4d · 2026-10-08 | 82° | 81° | 82° | 83° | 82° | 82° | 78° | 78–83° |
| 3d · 2026-10-09 | 81° | 82° | 78° | 82° | 82° | 81° | 84° | 78–84° |
| 2d · 2026-10-10 | 80° | 81° | 80° | 79° | 85° | 85° | 84° | 79–85° |
| 1d · 2026-10-11 | 80° | 80° | 76° | 80° | 84° | 78° | 79° | 76–84° |
| actual | 83° |
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 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.