RainBug is a high resolution spatial and temporal rain forecasting application. Able to forecast rain hourly, daily, weekly, monthly and seasonally. Forecasting data can be displayed in both sub-district, district, province, river basin branches. and the main watershed covering the northern area The forecast results are presented both in the form of time series (Time Series) and Map (Map). They can be used to support decision-making in risk management of precipitation variability in each period of forecasting in water management and agriculture to reduce potential impacts However, this RainBug application is reporting forecasts from numerical weather models that are still uncertain about the forecast results. In particular, the uncertainty of the forecast results increases with the duration of the forecast. which is a limitation of current knowledge of atmospheric science. Including the need to develop continuously. Users please use with awareness of such limitations. And the development team reserves no responsibility for any damage that may occur from using this application in making various decisions.