Was the forecast right for Detroit on Sat Aug 29?
Detroit, Michigan · daily high temperature in °C · forecasts from each model's archived runs, verified against the DTW observations
4 days out, 7 models put Detroit's Sat Aug 29 high anywhere from 25° to 30°;by the final call, the day before, the field had settled to a median of 28°. The day verified at 28° against the DTW observations — cloudy.
ICON landed closest, off by 0.1°. AIGFS ran 2° cool.
What every model said, at every lead
Daily-high calls for Sat Aug 29 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 Detroit scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 4d · 2026-08-25 | 27° | 25° | 28° | 28° | 30° | 26° | 25° | 25–30° |
| 3d · 2026-08-26 | 28° | 26° | 26° | 25° | 29° | 27° | 26° | 25–29° |
| 2d · 2026-08-27 | 28° | 27° | 28° | 27° | 28° | 28° | 27° | 27–28° |
| 1d · 2026-08-28 | 28° | 27° | 28° | 30° | 28° | 28° | 28° | 27–30° |
| actual | 28° |
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 Detroit — 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 DTW 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.