Was the forecast right for Salt Lake City on Wed Aug 26?
Salt Lake City, Utah · daily high temperature in °F · forecasts from each model's archived runs, verified against the SLC observations
6 days out, 7 models put Salt Lake City's Wed Aug 26 high anywhere from 91° to 99°;by the final call, the day before, the field had settled to a median of 93°. The day verified at 96° against the SLC observations — cloudy.
GEM landed closest, off by 1.0°. AIFS ran 4° cool.
What every model said, at every lead
Daily-high calls for Wed Aug 26 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 |
|---|---|---|---|---|---|---|---|---|
| 6d · 2026-08-20 | 92° | 93° | 97° | 91° | 99° | 97° | 96° | 91–99° |
| 5d · 2026-08-21 | 94° | 92° | 97° | 92° | 96° | 97° | 96° | 92–97° |
| 4d · 2026-08-22 | 94° | 93° | 94° | 92° | 96° | 96° | 94° | 92–96° |
| 3d · 2026-08-23 | 92° | 93° | 94° | 93° | 95° | 92° | 91° | 91–95° |
| 2d · 2026-08-24 | 92° | 93° | 93° | 94° | 95° | 94° | 94° | 92–95° |
| 1d · 2026-08-25 | 92° | 92° | 93° | 95° | 94° | 94° | 93° | 92–95° |
| actual | 96° |
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. The actual values are the ones in hand when this receipt was settled, usually 2 days after the date; a correction published after that is not carried into it. Archive depth varies by city; receipts exist only for dates the archive watched arrive.