Was the forecast right for Salt Lake City on Mon Sep 14?
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 14 high anywhere from 61° to 84°; by the final call the field had settled to a median of 70°. The day verified at 72° against the SLC observations — partly cloudy.
ECMWF landed closest, off by 0.9°. UKMO ran 3° cold.
What every model said, at every lead
Daily-high calls for Mon Sep 14 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 · 2026-08-30 | — | 67° | — | — | 88° | — | — | 67–88° |
| 14d · 2026-08-31 | 84° | 67° | 61° | — | 65° | — | — | 61–84° |
| 13d · 2026-09-01 | 83° | 80° | 64° | — | 84° | — | — | 64–84° |
| 12d · 2026-09-02 | 77° | 68° | 86° | — | 86° | — | — | 68–86° |
| 11d · 2026-09-03 | 88° | 76° | 68° | — | 73° | — | — | 68–88° |
| 10d · 2026-09-04 | 86° | 71° | 88° | — | 78° | — | — | 71–88° |
| 9d · 2026-09-05 | 70° | 82° | 87° | 85° | 75° | — | — | 70–87° |
| 8d · 2026-09-06 | 71° | 90° | 73° | 78° | 78° | — | — | 71–90° |
| 7d · 2026-09-07 | 78° | 86° | 72° | 76° | 76° | — | — | 72–86° |
| 6d · 2026-09-08 | 72° | 72° | 74° | 77° | 74° | 70° | 72° | 70–77° |
| 5d · 2026-09-09 | 73° | 70° | 74° | 82° | 72° | 70° | 77° | 70–82° |
| 4d · 2026-09-10 | 71° | 70° | 74° | 78° | 73° | 73° | 75° | 70–78° |
| 3d · 2026-09-11 | 72° | 70° | 74° | 73° | 72° | 72° | 75° | 70–75° |
| 2d · 2026-09-12 | 70° | 70° | 72° | 72° | 72° | 72° | 72° | 70–72° |
| 1d · 2026-09-13 | 71° | 68° | 72° | 72° | 70° | 72° | 71° | 68–72° |
| 0d · 2026-09-14 | 71° | 70° | 71° | 70° | 71° | 70° | 69° | 69–71° |
| actual | 72° |
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.