Was the forecast right for Salt Lake City on Mon Aug 24?
Salt Lake City, Utah · daily high temperature in °F · forecasts from each model's archived runs, verified against the SLC observations
4 days out, 7 models put Salt Lake City's Mon Aug 24 high anywhere from 88° to 96°;by the final call, the day before, the field had settled to a median of 91°. The day verified at 95° against the SLC observations, with 0.06 in of precipitation — drizzle.
ICON landed closest, off by 0.8°. AIFS ran 8° cool.
What every model said, at every lead
Daily-high calls for Mon Aug 24 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 |
|---|---|---|---|---|---|---|---|---|
| 4d · 2026-08-20 | 90° | 88° | 93° | 90° | 94° | 96° | 92° | 88–96° |
| 3d · 2026-08-21 | 91° | 90° | 93° | 91° | 93° | 95° | 93° | 90–95° |
| 2d · 2026-08-22 | 89° | 90° | 92° | 89° | 93° | 96° | 91° | 89–96° |
| 1d · 2026-08-23 | 87° | 91° | 89° | 91° | 93° | 96° | 91° | 87–96° |
| actual | 95° |
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.