Was the forecast right for Boston on Wed Oct 14?
Boston, Massachusetts · daily high temperature in °F · forecasts from each model's archived runs, verified against the BOS observations
14 days out, 4 models put Boston's Wed Oct 14 high anywhere from 57° to 69°;by the final call, the day before, the field had settled to a median of 74°. The day verified at 77° against the BOS observations, with 0.02 in of precipitation — cloudy.
AIGFS landed closest, off by 0.5°. AIFS ran 5° cool.
What every model said, at every lead
Daily-high calls for Wed Oct 14 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 Boston scoreboard shows them, labelled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 15d · 2026-09-29 | — | 57° | — | — | 58° | — | — | 57–58° |
| 14d · 2026-09-30 | 69° | 65° | 57° | — | 66° | — | — | 57–69° |
| 13d · 2026-10-01 | 50° | 53° | 62° | — | 63° | — | — | 50–63° |
| 12d · 2026-10-02 | 52° | 48° | 59° | — | 78° | — | — | 48–78° |
| 11d · 2026-10-03 | 58° | 55° | 60° | — | 70° | — | — | 55–70° |
| 10d · 2026-10-04 | 65° | 47° | 62° | — | 48° | — | — | 47–65° |
| 9d · 2026-10-05 | 70° | 60° | 77° | 55° | 64° | — | — | 55–77° |
| 8d · 2026-10-06 | 67° | 65° | 63° | 71° | 56° | — | — | 56–71° |
| 7d · 2026-10-07 | 68° | 68° | 55° | 72° | 60° | — | — | 55–72° |
| 6d · 2026-10-08 | 74° | 79° | 58° | 69° | 69° | 68° | 55° | 55–79° |
| 5d · 2026-10-09 | 76° | 68° | 64° | 58° | 63° | 60° | 56° | 56–76° |
| 4d · 2026-10-10 | 76° | 76° | 70° | 66° | 73° | 66° | 77° | 66–77° |
| 3d · 2026-10-11 | 70° | 79° | 66° | 77° | 76° | 75° | 61° | 61–79° |
| 2d · 2026-10-12 | — | 76° | 75° | 79° | 75° | 75° | 72° | 72–79° |
| 1d · 2026-10-13 | 72° | 76° | 73° | 78° | 72° | 74° | 75° | 72–78° |
| actual | 77° |
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 Boston — 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 BOS 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.