Was the forecast right for Salt Lake City on Fri Sep 18?
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 Fri Sep 18 high anywhere from 71° to 93°; by the final call the field had settled to a median of 75°. The day verified at 82° against the SLC observations, with 0.6 in of precipitation — showers.
GFS landed closest, off by 0.9°. ECMWF ran 9° cold.
What every model said, at every lead
Daily-high calls for Fri Sep 18 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 · 2026-09-03 | — | 82° | — | — | 79° | — | — | 79–82° |
| 14d · 2026-09-04 | 85° | 71° | 92° | — | 93° | — | — | 71–93° |
| 13d · 2026-09-05 | 83° | 81° | 90° | — | 77° | — | — | 77–90° |
| 12d · 2026-09-06 | 86° | 87° | 92° | — | 82° | — | — | 82–92° |
| 11d · 2026-09-07 | 85° | 86° | 81° | — | 90° | — | — | 81–90° |
| 10d · 2026-09-08 | 73° | 65° | 75° | — | 88° | — | — | 65–88° |
| 9d · 2026-09-09 | 79° | 80° | 91° | 82° | 87° | — | — | 79–91° |
| 8d · 2026-09-10 | 76° | 82° | 83° | 86° | 81° | — | — | 76–86° |
| 7d · 2026-09-11 | 86° | 81° | 84° | 80° | 80° | — | — | 80–86° |
| 6d · 2026-09-12 | 80° | 77° | 77° | 78° | 89° | 84° | 85° | 77–89° |
| 5d · 2026-09-13 | 80° | 85° | 85° | 81° | 83° | 79° | 83° | 79–85° |
| 4d · 2026-09-14 | 77° | 80° | 77° | 74° | 82° | 81° | 83° | 74–83° |
| 3d · 2026-09-15 | 77° | 80° | 71° | 78° | 82° | 77° | 78° | 71–82° |
| 2d · 2026-09-16 | 74° | 79° | 73° | 73° | 83° | 75° | 77° | 73–83° |
| 1d · 2026-09-17 | 75° | 77° | 74° | 71° | 83° | 75° | 78° | 71–83° |
| 0d · 2026-09-18 | 73° | 78° | 73° | 75° | 83° | 74° | 77° | 73–83° |
| actual | 82° |
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.