the prediction for the area north/east Thailand are often incorrect - mostly are rainstorm not mention - as one of many example the night from 22/4 to 23/4 we had the worst rainstorm for years - wind until 60 km/h and at least 30mm of rain - your prediction was showing sunshine and light clouds - rain not before the end of next week
Windy makes no weather forecasts.
Just visualizes forecast models of American, European and German meteorological institutions.
You say: "...rain not before the end of next week".
As I see here https://www.windy.com/?rain,14.966,100.767,5
rain is forecasted every day !
Also the rain accumulation for the next 3 days is 45mm.