In the present study attempts have been made to identify a most important weeks for wheat yield at district level. Weekly data of 18 meteorological weeks on (47th to 52nd weeks on first year and 1st to 12th Standard Meteorological Weeks, SMW for 2nd year) on minimum temperature over a span of 20 year (1995 to 2015) has been used along with the annual wheat production data (used as detrened yield for fitting of model) for Faizabad district of eastern . Distribution of temperature has been recorded for wheat crop. Yield of wheat crop was recorded yearly for the study. | Identification of most important weeks on minimum temperature for wheat crop