Was the forecast right for London on Fri Oct 23?
London, England · daily high temperature in °F · forecasts from each model's archived runs, verified against the EGLL observations
14 days out, 4 models put London's Fri Oct 23 high anywhere from 52° to 58°;by the final call, the day before, the field had settled to a median of 55°. The day verified at 55° against the EGLL observations, with 0.95 in of precipitation — thunderstorms.
GFS landed closest, off by 0.0°. AIFS 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 London scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-10-08 | — | 61° | — | — | 64° | — | — | 61–64° |
| 14d · 2026-10-09 | 57° | 53° | 52° | — | 58° | — | — | 52–58° |
| 13d · 2026-10-10 | 49° | 58° | 59° | — | 59° | — | — | 49–59° |
| 12d · 2026-10-11 | 53° | 59° | 57° | — | 55° | — | — | 53–59° |
| 11d · 2026-10-12 | 56° | 64° | 55° | — | 65° | — | — | 55–65° |
| 10d · 2026-10-13 | — | 63° | 59° | — | 62° | — | — | 59–63° |
| 9d · 2026-10-14 | 58° | 64° | 61° | 61° | 67° | — | — | 58–67° |
| 8d · 2026-10-15 | 58° | 60° | 57° | 59° | 57° | — | — | 57–60° |
| 7d · 2026-10-16 | 56° | 61° | 59° | 61° | 55° | — | — | 55–61° |
| 6d · 2026-10-17 | 55° | 59° | 55° | 55° | 57° | 56° | 57° | 55–59° |
| 5d · 2026-10-18 | 56° | 56° | 55° | 54° | 57° | 58° | 56° | 54–58° |
| 4d · 2026-10-19 | 54° | 57° | 53° | 54° | 56° | 57° | 56° | 53–57° |
| 3d · 2026-10-20 | 54° | 56° | 54° | 57° | 56° | 56° | 55° | 54–57° |
| 2d · 2026-10-21 | 54° | 56° | 58° | 56° | 55° | 57° | 56° | 54–58° |
| 1d · 2026-10-22 | 53° | 55° | 54° | 55° | 55° | 57° | 56° | 53–57° |
| actual | 55° |
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 London — 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 EGLL 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.