Was the forecast right for St. Louis on Mon Oct 26?
St. Louis, Missouri · daily high temperature in °C · forecasts from each model's archived runs, verified against the STL observations
13 days out, 4 models put St. Louis's Mon Oct 26 high anywhere from 17° to 26°;by the final call, the day before, the field had settled to a median of 24°. The day verified at 25° against the STL observations — cloudy.
GFS landed closest, off by 0.6°. ECMWF ran 3° 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 St. Louis scoreboard shows them, labeled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-10-11 | — | 15° | — | — | 17° | — | — | 15–17° |
| 14d · 2026-10-12 | — | 17° | 16° | — | 14° | — | — | 14–17° |
| 13d · 2026-10-13 | 17° | 19° | 26° | — | 18° | — | — | 17–26° |
| 12d · 2026-10-14 | 13° | 15° | 23° | — | 16° | — | — | 13–23° |
| 11d · 2026-10-15 | 24° | 23° | 27° | — | 27° | — | — | 23–27° |
| 10d · 2026-10-16 | 22° | 12° | 23° | — | 23° | — | — | 12–23° |
| 9d · 2026-10-17 | 24° | 22° | 22° | 23° | 17° | — | — | 17–24° |
| 8d · 2026-10-18 | 21° | 20° | 24° | 22° | 22° | — | — | 20–24° |
| 7d · 2026-10-19 | 24° | 23° | 19° | 24° | 23° | — | — | 19–24° |
| 6d · 2026-10-20 | 24° | 24° | 22° | 23° | 24° | 24° | 21° | 21–24° |
| 5d · 2026-10-21 | 25° | 24° | 23° | 24° | 25° | 23° | 23° | 23–25° |
| 4d · 2026-10-22 | 24° | 24° | 22° | 23° | 25° | 25° | 23° | 22–25° |
| 3d · 2026-10-23 | 24° | 24° | 23° | 24° | 24° | 25° | 23° | 23–25° |
| 2d · 2026-10-24 | 24° | 24° | 23° | 25° | 25° | 25° | 23° | 23–25° |
| 1d · 2026-10-25 | 23° | 24° | 22° | 26° | 24° | 24° | 22° | 22–26° |
| actual | 25° |
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 St. Louis — 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 STL 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.