Was the forecast right for Salt Lake City on Sat Sep 5?
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 Sat Sep 5 high anywhere from 85° to 92°; by the final call the field had settled to a median of 89°. The day verified at 91° against the SLC observations — clear.
ICON landed closest, off by 1.7°. GEM ran 3° cold.
What every model said, at every lead
Daily-high calls for Sat Sep 5 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 · 2026-08-21 | — | 76° | — | — | 88° | — | — | 76–88° |
| 14d · 2026-08-22 | 89° | 85° | 90° | — | 92° | — | — | 85–92° |
| 13d · 2026-08-23 | 85° | 77° | 93° | — | 96° | — | — | 77–96° |
| 12d · 2026-08-24 | 68° | 55° | 89° | — | 70° | — | — | 55–89° |
| 11d · 2026-08-25 | 73° | 85° | 83° | — | 91° | — | — | 73–91° |
| 10d · 2026-08-26 | 75° | 70° | 81° | — | 87° | — | — | 70–87° |
| 9d · 2026-08-27 | 71° | 70° | 93° | 80° | 84° | — | — | 70–93° |
| 8d · 2026-08-28 | 91° | 94° | 87° | 75° | 82° | — | — | 75–94° |
| 7d · 2026-08-29 | 89° | 92° | 82° | 81° | 93° | — | — | 81–93° |
| 6d · 2026-08-30 | 88° | 90° | 87° | 90° | 87° | 78° | 86° | 78–90° |
| 5d · 2026-08-31 | 88° | 92° | 88° | 87° | 88° | 89° | 87° | 87–92° |
| 4d · 2026-09-01 | 88° | 90° | 88° | 86° | 90° | 88° | 86° | 86–90° |
| 3d · 2026-09-02 | 88° | 89° | 88° | 87° | 90° | 88° | 88° | 87–90° |
| 2d · 2026-09-03 | 89° | 89° | 88° | 88° | 89° | 88° | 88° | 88–89° |
| 1d · 2026-09-04 | 89° | 89° | 88° | 88° | 90° | 88° | 88° | 88–90° |
| 0d · 2026-09-05 | 89° | 89° | 88° | 88° | 89° | 89° | 88° | 88–89° |
| actual | 91° |
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.