A study was conducted at three different agroeclogical zones (southern, western and north eastern zones) of Tamil Nadu to assess the effect of climatic parameters on seed yield and quality of maize hybrid COHM 8 during rabi, 2021. One of the major factors affecting maize seed production is weather and this proposed work was attempted to ascertain the suitability of different weather parameters at different growth stages of maize hybrid on seed yield and quality. Seed crop was raised at all three locations with three dates of sowing at 15 days intervals (2nd fortnight of September, 1st fortnight of October and 2nd fortnight of October). In the present study, the erratic rainfall along with lower temperature and relative humidity experienced in southern zone and north eastern zone had a great impact on crop growth during different growth stages of seed crop of maize and thus results in lower yield. In southern zone, 2nd fortnight of October resulted in higher seed yield (4082 Kg/ha) compared to yield of 2nd fortnight of September (2721 Kg/ha) or 1st fortnight of October (2397 Kg/ha). In north eastern zone, 2nd fortnight of September recorded higher seed yield (3919 Kg/ha) than at 1st fortnight of October (2503 Kg/ha) and 2nd fortnight of October (2277 Kg/ha). In western zone, all the three dates of sowing registered higher seed yield which were on par to each other may be due to the favorable weather attributes along with required rainfall during peak growth stages. The results confirmed the importance of temperature, rainfall and relative humidity on the growth of the crop to obtain higher seed yield.