Was the forecast right for Salt Lake City on Sat Sep 12?
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 12 high anywhere from 82° to 90°; by the final call the field had settled to a median of 90°. The day verified at 91° against the SLC observations — partly cloudy.
GEM landed closest, off by 0.4°. AIGFS ran 3° cold.
What every model said, at every lead
Daily-high calls for Sat Sep 12 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 · 2026-08-28 | — | 81° | — | — | 68° | — | — | 68–81° |
| 14d · 2026-08-29 | 88° | 82° | 90° | — | 88° | — | — | 82–90° |
| 13d · 2026-08-30 | 65° | 82° | 84° | — | 96° | — | — | 65–96° |
| 12d · 2026-08-31 | 78° | 77° | 72° | — | 88° | — | — | 72–88° |
| 11d · 2026-09-01 | 68° | 79° | 74° | — | 78° | — | — | 68–79° |
| 10d · 2026-09-02 | 72° | 71° | 83° | — | 76° | — | — | 71–83° |
| 9d · 2026-09-03 | 88° | 70° | 85° | 78° | 61° | — | — | 61–88° |
| 8d · 2026-09-04 | 91° | 90° | 85° | 82° | 82° | — | — | 82–91° |
| 7d · 2026-09-05 | 88° | 77° | 73° | 89° | 84° | — | — | 73–89° |
| 6d · 2026-09-06 | 93° | 94° | 87° | 90° | 83° | 91° | 90° | 83–94° |
| 5d · 2026-09-07 | 92° | 92° | 93° | 91° | 88° | 90° | 87° | 87–93° |
| 4d · 2026-09-08 | 91° | 91° | 93° | 90° | 90° | 94° | 92° | 90–94° |
| 3d · 2026-09-09 | 91° | 90° | 93° | 93° | 93° | 94° | 90° | 90–94° |
| 2d · 2026-09-10 | 90° | 90° | 92° | 92° | 92° | 94° | 90° | 90–94° |
| 1d · 2026-09-11 | 90° | 88° | 89° | 92° | 91° | 91° | 90° | 88–92° |
| 0d · 2026-09-12 | 90° | 88° | 89° | 91° | 90° | 90° | 89° | 88–91° |
| 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.