Mecca weather: the models compared
Mecca, tomorrow (Friday): a high of 31–32 °C and a low of 23–25 °C across 3 models.
Rain over the next 7 days: ECMWF IFS 4.8 mm, ECMWF AIFS 5.6 mm, NOAA GFS 4.5 mm.
The models are close on the temperature on 5 of the 10 days.
Day by day
| Day | ECMWF IFS | ECMWF AIFS | NOAA GFS | Models |
|---|---|---|---|---|
| Today | 34° / 22° | 34° / 24° | 32° / 24°Rain 0.1 mm | Some spread |
| Tomorrow | 32° / 23°Rain 3.2 mm | 31° / 25°Rain 3.6 mm | 32° / 25°Rain 0.4 mm | Some spread |
| Saturday, Nov 14 | 30° / 22°Rain 1 mm | 33° / 25°Rain 0.7 mm | 33° / 25°Rain 1.3 mm | Models disagree |
| Sunday, Nov 15 | 33° / 22° | 35° / 25°Rain 0.1 mm | 34° / 26° | Models disagree |
| Monday, Nov 16 | 33° / 22° | 35° / 26° | 34° / 26° | Models disagree |
| Tuesday, Nov 17 | 35° / 23°Rain 0.1 mm | 35° / 26° | 34° / 26° | Some spread |
| Wednesday, Nov 18 | 35° / 25° | 35° / 26°Rain 0.1 mm | 34° / 26°Rain 0.3 mm | Models agree |
| Thursday, Nov 19 | 33° / 25°Rain 0.5 mm | 33° / 26°Rain 1.1 mm | 31° / 26°Rain 2.5 mm | Some spread |
| Friday, Nov 20 | 34° / 25°Rain 0.5 mm | 36° / 25° | 33° / 26°Rain 11 mm | Models disagree |
| Saturday, Nov 21 | 34° / 24° | 36° / 25° | 32° / 22°Rain 14 mm | Models disagree |
Runs used: ECMWF IFS, Nov 11 12 UTC run · ECMWF AIFS, Nov 11 18 UTC run · NOAA GFS, Nov 11 18 UTC run. Updated Nov 12, 03:21 AM.
Why several models?
Each weather centre runs its own model of the atmosphere, and no single one is always right. When the models agree, the forecast is more certain; when they disagree, the weather is harder to call, and it is worth watching the newer runs. The Lab's Forecast mode shows each model's maps, and Compare models sets them side by side for any place.
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Data: ECMWF (CC BY 4.0), NOAA (public domain), DWD (CC BY 4.0). Places: GeoNames (CC BY 4.0).