Was the forecast right for Philadelphia on Fri Oct 23?
Philadelphia, Pennsylvania · daily high temperature in °F · forecasts from each model's archived runs, verified against the PHL observations
14 days out, 4 models put Philadelphia's Fri Oct 23 high anywhere from 58° to 76°;by the final call, the day before, the field had settled to a median of 61°. The day verified at 62° against the PHL observations — cloudy.
AIFS landed closest, off by 0.1°. UKMO ran 3° cool.
What every model said, at every lead
Daily-high calls for Fri Oct 23 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 Philadelphia scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-10-08 | — | 60° | — | — | 68° | — | — | 60–68° |
| 14d · 2026-10-09 | 70° | 58° | 76° | — | 66° | — | — | 58–76° |
| 13d · 2026-10-10 | 65° | 71° | 71° | — | 67° | — | — | 65–71° |
| 12d · 2026-10-11 | 66° | 60° | 69° | — | 64° | — | — | 60–69° |
| 11d · 2026-10-12 | — | 60° | 64° | — | 70° | — | — | 60–70° |
| 10d · 2026-10-13 | 69° | 70° | 71° | — | 62° | — | — | 62–71° |
| 9d · 2026-10-14 | 74° | 68° | 60° | 66° | 69° | — | — | 60–74° |
| 8d · 2026-10-15 | 66° | 67° | 62° | 66° | 66° | — | — | 62–67° |
| 7d · 2026-10-16 | 54° | 64° | 60° | 52° | 67° | — | — | 52–67° |
| 6d · 2026-10-17 | 60° | 63° | 58° | 62° | 65° | 57° | 60° | 57–65° |
| 5d · 2026-10-18 | 61° | 62° | 56° | 60° | 63° | 58° | 61° | 56–63° |
| 4d · 2026-10-19 | 60° | 60° | 55° | 60° | 62° | 58° | 56° | 55–62° |
| 3d · 2026-10-20 | 61° | 60° | 56° | 60° | 61° | 60° | 58° | 56–61° |
| 2d · 2026-10-21 | 62° | 61° | 58° | 62° | 62° | 60° | 59° | 58–62° |
| 1d · 2026-10-22 | 62° | 61° | 59° | 60° | 62° | 61° | 59° | 59–62° |
| actual | 62° |
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 Philadelphia — 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 PHL 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.