Was the forecast right for Berlin on Thu Sep 10?
Berlin, State of Berlin · daily high temperature in °C · forecasts from each model's archived runs, verified against the EDDB observations
12 days out, 4 models put Berlin's Thu Sep 10 high anywhere from 18° to 22°;by the final call, the day before, the field had settled to a median of 19°. The day verified at 20° against the EDDB observations — drizzle.
GFS landed closest, off by 0.3°. AIFS ran 2° cool.
What every model said, at every lead
Daily-high calls for Thu Sep 10 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 Berlin scoreboard shows them, labeled.
| Lead | AIFS | AIGFS | ECMWF | GEM | GFS | ICON | UKMO | Range |
|---|---|---|---|---|---|---|---|---|
| 12d · 2026-08-29 | 18° | 19° | 20° | — | 22° | — | — | 18–22° |
| 11d · 2026-08-30 | 19° | 21° | 23° | — | 19° | — | — | 19–23° |
| 10d · 2026-08-31 | 21° | 16° | 24° | — | 19° | — | — | 16–24° |
| 9d · 2026-09-01 | 18° | 19° | 18° | 19° | 18° | — | — | 18–19° |
| 8d · 2026-09-02 | 19° | 20° | 18° | 19° | 20° | — | — | 18–20° |
| 7d · 2026-09-03 | 19° | 19° | 19° | 19° | 20° | — | — | 19–20° |
| 6d · 2026-09-04 | 19° | 18° | 15° | 18° | 21° | 20° | — | 15–21° |
| 5d · 2026-09-05 | 17° | 19° | 20° | 18° | 20° | 19° | 19° | 17–20° |
| 4d · 2026-09-06 | 18° | 18° | 20° | 20° | 21° | 19° | 19° | 18–21° |
| 3d · 2026-09-07 | 17° | 19° | 18° | 18° | 21° | 19° | 19° | 17–21° |
| 2d · 2026-09-08 | 18° | 18° | 18° | 18° | 20° | 19° | 18° | 18–20° |
| 1d · 2026-09-09 | 18° | 18° | 18° | 19° | 20° | 19° | 19° | 18–20° |
| actual | 20° |
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 Berlin — 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 EDDB observations. The actual values are the ones in hand when this day was verified, usually 2 days after the date; a correction published after that is not carried into it. Archive depth varies by city; verified days exist only for dates the archive watched arrive.