Was the forecast right for Salt Lake City on Tue Sep 8?
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 Tue Sep 8 high anywhere from 76° to 92°; by the final call the field had settled to a median of 79°. The day verified at 83° against the SLC observations — clear.
GEM landed closest, off by 2.0°. AIGFS ran 5° cold.
What every model said, at every lead
Daily-high calls for Tue Sep 8 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 · 2026-08-24 | — | 80° | — | — | 88° | — | — | 80–88° |
| 14d · 2026-08-25 | 76° | 88° | 92° | — | 92° | — | — | 76–92° |
| 13d · 2026-08-26 | 75° | 79° | 87° | — | 91° | — | — | 75–91° |
| 12d · 2026-08-27 | 91° | 88° | 84° | — | 78° | — | — | 78–91° |
| 11d · 2026-08-28 | 82° | 77° | 85° | — | 82° | — | — | 77–85° |
| 10d · 2026-08-29 | 81° | 80° | 83° | — | 95° | — | — | 80–95° |
| 9d · 2026-08-30 | 90° | 79° | 73° | 74° | 88° | — | — | 73–90° |
| 8d · 2026-08-31 | 78° | 68° | 78° | 74° | 90° | — | — | 68–90° |
| 7d · 2026-09-01 | 75° | 74° | 77° | 68° | 74° | — | — | 68–77° |
| 6d · 2026-09-02 | 80° | 73° | 80° | 79° | 79° | 76° | 79° | 73–80° |
| 5d · 2026-09-03 | 79° | 77° | 83° | 80° | 80° | 78° | 72° | 72–83° |
| 4d · 2026-09-04 | 78° | 74° | 79° | 77° | 79° | 77° | 78° | 74–79° |
| 3d · 2026-09-05 | 79° | 76° | 82° | 80° | 80° | 78° | 77° | 76–82° |
| 2d · 2026-09-06 | 80° | 77° | 80° | 80° | 80° | 81° | 81° | 77–81° |
| 1d · 2026-09-07 | 81° | 77° | 80° | 80° | 80° | 80° | 78° | 77–81° |
| 0d · 2026-09-08 | 81° | 78° | 80° | 81° | 79° | 79° | 79° | 78–81° |
| actual | 83° |
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.