Was the forecast right for Detroit on Wed Sep 30?
Detroit, Michigan · daily high temperature in °F · forecasts from each model's archived runs, verified against the DTW observations
14 days out, 4 models put Detroit's Wed Sep 30 high anywhere from 65° to 81°;by the final call, the day before, the field had settled to a median of 72°. The day verified at 71° against the DTW observations — drizzle.
UKMO landed closest, off by 0.2°. GEM ran 5° warm.
What every model said, at every lead
Daily-high calls for Wed Sep 30 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 |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-15 | — | 69° | — | — | 67° | — | — | 67–69° |
| 14d · 2026-09-16 | 69° | 65° | 69° | — | 81° | — | — | 65–81° |
| 13d · 2026-09-17 | 72° | 75° | 67° | — | 68° | — | — | 67–75° |
| 12d · 2026-09-18 | 73° | 67° | 60° | — | 61° | — | — | 60–73° |
| 11d · 2026-09-19 | 69° | 65° | 76° | — | 72° | — | — | 65–76° |
| 10d · 2026-09-20 | 64° | 77° | 68° | — | 81° | — | — | 64–81° |
| 9d · 2026-09-21 | 74° | 78° | 76° | 66° | 69° | — | — | 66–78° |
| 8d · 2026-09-22 | 64° | 82° | 76° | 74° | 81° | — | — | 64–82° |
| 7d · 2026-09-23 | 70° | 74° | 73° | 67° | 66° | — | — | 66–74° |
| 6d · 2026-09-24 | 70° | 70° | 67° | 66° | 64° | 73° | 65° | 64–73° |
| 5d · 2026-09-25 | 70° | 63° | 76° | 74° | 67° | 76° | 71° | 63–76° |
| 4d · 2026-09-26 | 71° | 72° | 69° | 75° | 72° | 73° | 73° | 69–75° |
| 3d · 2026-09-27 | 74° | 76° | 75° | 76° | 81° | 70° | 72° | 70–81° |
| 2d · 2026-09-28 | 70° | 69° | 72° | 74° | 76° | 68° | 71° | 68–76° |
| 1d · 2026-09-29 | 72° | 71° | 73° | 76° | 73° | 72° | 71° | 71–76° |
| actual | 71° |
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.