Siem Reap Forecast Models Compared – ECMWF, GFS, ICON, JMA
Four models compared
| ECMWF IFS | NOAA GFS | DWD ICON | JMA | Agreement | |
|---|---|---|---|---|---|
| Thursday 05/11 | 31° 6.5mm | 28° 2.9mm | 32° 4.8mm | 30° 5.5mm | 78% ±3.6° · 4/4 |
| Friday 06/11 | 31° 1.4mm | 33° 0.0mm | 32° 4.5mm | 32° 3.9mm | 73% ±2.3° · 3/4 |
| Saturday 07/11 | 31° 6.4mm | 34° 0.9mm | 32° 0.6mm | 32° 0.1mm | 71% ±2.7° · 1/4 |
| Sunday 08/11 | 32° 5.5mm | 33° 3.1mm | 33° 0.0mm | 31° -0.1mm | 65% ±1.6° · 2/4 |
| Monday 09/11 | 32° 1.8mm | 33° 2.1mm | 33° 0.3mm | 32° 0.5mm | 66% ±1.5° · 2/4 |
| Tuesday 10/11 | 32° 9.4mm | 31° 5.1mm | 31° 0.6mm | 30° 0.0mm | 64% ±1.7° · 2/4 |
When the models disagree, confidence in that day is lower.
- ECMWF IFS — ECMWF (EU), 25 km
- NOAA GFS — NOAA (US), 13 km
- DWD ICON — Deutscher Wetterdienst, 11 km
- JMA — Japan Met. Agency, 5 km
Verified accuracy
| Lead time | Mean temperature error | Within 2°C | Rain call correct | Days verified |
|---|---|---|---|---|
| 1d | 0.89 °C | 90% | 90% | 21 |
| 2d | 1.04 °C | 95% | 85% | 20 |
| 3d | 1.67 °C | 68% | 74% | 19 |
Every day the system stores the forecast it issued, then checks it against observed data. These numbers are the result of that check, not a marketing claim.
2026-08-13 → 2026-09-02 · n=60
Common questions
Will it rain in Siem Reap today?
Yes. Rain is expected around 12:00–17:00, totalling roughly 6.2 mm.
How hot is it in Siem Reap today?
Between 24°C and 31°C, with a felt maximum of 37°C.
What is the weather in Siem Reap tomorrow?
Tomorrow: drizzle, 24–31°C, with a 45% chance of rain.