Was the forecast right for New York on Tue Aug 18?
New York, New York · daily high temperature in °F · forecasts from each model's archived runs, verified against the ECMWF IFS analysis
13 days out, 4 models put New York's Tue Aug 18 high anywhere from 80° to 86°; by the final call the field had settled to a median of 84°. The day verified at 84° against the ECMWF IFS analysis, with 0.17 in of precipitation — drizzle.
ICON landed closest, off by 0.3°. GEM ran 4° hot.
What every model said, at every lead
Daily-high calls for Tue Aug 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 New York scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-08-03 | — | 77° | — | — | 83° | — | — | 77–83° |
| 14d · 2026-08-04 | 77° | 76° | — | — | 81° | — | — | 76–81° |
| 13d · 2026-08-05 | 80° | 86° | 83° | — | 82° | — | — | 80–86° |
| 12d · 2026-08-06 | 80° | 86° | 90° | — | 77° | — | — | 77–90° |
| 11d · 2026-08-07 | 72° | 82° | 80° | — | 82° | — | — | 72–82° |
| 10d · 2026-08-08 | 83° | 86° | 79° | — | 71° | — | — | 71–86° |
| 9d · 2026-08-09 | 82° | 81° | 85° | — | 82° | — | — | 81–85° |
| 8d · 2026-08-10 | 84° | 83° | 80° | 84° | 81° | — | — | 80–84° |
| 7d · 2026-08-11 | 86° | 84° | 88° | 82° | 82° | — | — | 82–88° |
| 6d · 2026-08-12 | 79° | 81° | 85° | 83° | 83° | 79° | — | 79–85° |
| 5d · 2026-08-13 | 81° | 82° | 81° | 84° | 82° | 84° | 88° | 81–88° |
| 4d · 2026-08-14 | 83° | 84° | 84° | 82° | 84° | 86° | 87° | 82–87° |
| 3d · 2026-08-15 | 84° | 83° | 88° | 80° | 88° | 85° | 87° | 80–88° |
| 2d · 2026-08-16 | 84° | 84° | 86° | 84° | 86° | 87° | 89° | 84–89° |
| 1d · 2026-08-17 | 85° | 86° | 85° | 87° | 88° | 83° | 87° | 83–88° |
| 0d · 2026-08-18 | 83° | 86° | 85° | 87° | 84° | 83° | 84° | 83–87° |
| actual | 84° |
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 New York — 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 ECMWF IFS analysis (temperature_2m_max). Archive depth varies by city; receipts exist only for dates the archive watched arrive.