This is a unique book on operational agro meteorology. It has contents that explicitly state that: · Weather is a non-monetary input in all agricultural operations. If weather based farming is done, the cost of cultivation of crops can be reduced at least by 10% and quality of the agricultural produce be improved by 2-3% · Past 10 days weather is as important as 10 day forecast of weather, in developing weather based technologies and making farm management decisions · Growing Degree Days are very much useful in predicting pests and helio- thermal units are highly useful in predicting diseases on crops. Reflecting on his teaching experience, research findings and extension activities the author provided a roadmap through this book for not only profitable agriculture in the odd events of weather disasters but also ways that enhance the prestige and dignity of the farmers.