Climate Field School (CFS) is one of BMKG yearly program has been established since 2007 until present day. In general, the CFS objective is to anticipate climate extreme by improving the farmers insight of BMKG’s climate & weather information and use the information for agriculture activity. In the early days, the CFS is focusing on rice farming. Rice is the majority of Indonesian main source of food. Therefore, the productivity & stability of rice production is one of the government of Indonesia’s main concern. However, in 2016, Ministry of Agriculture recorded from 8.2 million hectare of wetland, the ratio between irrigated and non-irrigated (mostly rain-fed) paddy field (wetland) is: 6:4. Its mean that there are 3.4 million hectare of wetland still depend on rain-fed as the main source of water.