An experiment was conducted to know the influence of different weather parameters on late leaf spot (LLS) of groundnut on susceptible genotype K-6 under different dates of sowing during rabi 2017-18 in sandy soil. Correlation studies between severity of late leaf spots and weather parameters during rabi 2017-18 revealed that age of the crop (r = 0.908*) and relative humidity at morning (r = 0.411*) were significant and positively correlated with PDI whereas maximum temperature (r = -0.385*), minimum temperature (r = -0.644*) and relative humidity at evening (r = -0.388*) were significant and negatively correlated with PDI. Regression analysis of LLS PDI with weather factors revealed that age of the crop and maximum temperature influenced the development of LLS in K-6 genotype in all three sowings. AUDPC values for LLS per cent disease severity revealed that the third sowing has low AUDPC value with less disease severity. Hence, during rabi late sowing is more preferred than early sowing.