Was the forecast right for Salt Lake City on Mon Sep 7?
Salt Lake City, Utah · daily high temperature in °F · forecasts from each model's archived runs, verified against the SLC observations
14 days out, 4 models put Salt Lake City's Mon Sep 7 high anywhere from 73° to 92°; by the final call the field had settled to a median of 74°. The day verified at 77° against the SLC observations — drizzle.
ECMWF landed closest, off by 2.0°. UKMO ran 4° cold.
What every model said, at every lead
Daily-high calls for Mon Sep 7 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 Salt Lake City scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-23 | — | 85° | — | — | 86° | — | — | 85–86° |
| 14d · 2026-08-24 | 82° | 73° | 92° | — | 87° | — | — | 73–92° |
| 13d · 2026-08-25 | 82° | 87° | 92° | — | 88° | — | — | 82–92° |
| 12d · 2026-08-26 | 84° | 72° | 81° | — | 94° | — | — | 72–94° |
| 11d · 2026-08-27 | 82° | 85° | 83° | — | 83° | — | — | 82–85° |
| 10d · 2026-08-28 | 82° | 77° | 80° | — | 87° | — | — | 77–87° |
| 9d · 2026-08-29 | 84° | 88° | 78° | 80° | 95° | — | — | 78–95° |
| 8d · 2026-08-30 | 84° | 83° | 78° | 82° | 94° | — | — | 78–94° |
| 7d · 2026-08-31 | 75° | 76° | 86° | 73° | 86° | — | — | 73–86° |
| 6d · 2026-09-01 | 81° | 83° | 80° | 71° | 76° | 78° | 69° | 69–83° |
| 5d · 2026-09-02 | 77° | 70° | 73° | 73° | 80° | 73° | 78° | 70–80° |
| 4d · 2026-09-03 | 76° | 73° | 75° | 75° | 84° | 69° | 76° | 69–84° |
| 3d · 2026-09-04 | 75° | 69° | 74° | 76° | 72° | 70° | 76° | 69–76° |
| 2d · 2026-09-05 | 74° | 72° | 75° | 72° | 73° | 73° | 74° | 72–75° |
| 1d · 2026-09-06 | 75° | 73° | 76° | 74° | 74° | 75° | 73° | 73–76° |
| 0d · 2026-09-07 | 75° | 74° | 75° | 75° | 74° | 74° | 73° | 73–75° |
| actual | 77° |
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 Salt Lake City — 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 SLC observations. Archive depth varies by city; receipts exist only for dates the archive watched arrive.