Was the forecast right for Salt Lake City on Sat Aug 29?
Salt Lake City, Utah · daily high temperature in °F · forecasts from each model's archived runs, verified against the SLC observations
9 days out, 4 models put Salt Lake City's Sat Aug 29 high anywhere from 78° to 101°; by the final call the field had settled to a median of 78°. The day verified at 75° against the SLC observations, with 0.2 in of precipitation — showers.
ECMWF landed closest, off by 0.0°. GFS ran 9° hot.
What every model said, at every lead
Daily-high calls for Sat Aug 29 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 |
|---|---|---|---|---|---|---|---|---|
| 9d · 2026-08-20 | 86° | 78° | 95° | — | 101° | — | — | 78–101° |
| 8d · 2026-08-21 | 86° | 79° | 92° | 88° | 90° | — | — | 79–92° |
| 7d · 2026-08-22 | 81° | 83° | 92° | 90° | 94° | — | — | 81–94° |
| 6d · 2026-08-23 | 71° | 79° | 90° | 82° | 94° | 84° | 80° | 71–94° |
| 5d · 2026-08-24 | 73° | 77° | 90° | 76° | 82° | 76° | 85° | 73–90° |
| 4d · 2026-08-25 | 74° | 76° | 80° | 77° | 80° | 77° | 78° | 74–80° |
| 3d · 2026-08-26 | 72° | 76° | 79° | 84° | 82° | 76° | 76° | 72–84° |
| 2d · 2026-08-27 | 72° | 77° | 76° | 81° | 85° | 77° | 77° | 72–85° |
| 1d · 2026-08-28 | 70° | 76° | 73° | 76° | 82° | 77° | 76° | 70–82° |
| 0d · 2026-08-29 | 73° | 78° | 75° | 83° | 84° | 74° | 78° | 73–84° |
| actual | 75° |
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.