temperature and sunshine hours, being the major dimatic factors influencing rubber growth and yield, were analyzed at four rubber research stations in the traditional rubber growing regions of Tamil Nadu, Kerala and Karnataka having daily datasets ranging from 11 to 53 years. No significant trend was noted in the annual rainfall amount and total number of rainy days over 53 years at Kottayam. Annual maximum and minimum temperature trends were not significant for stations other than Kottayam. Increase in maximum temperature was observed in Kottayam while minimum temperature decreased in Parliar and Nettana. The daily bright sunshine hours showed a decreasing trend in Kottayam. Extreme rainfall events increased in Padiyoor Long-term decadal means in maximum temperature showed an increase of 2 Cover 53 years in Kottayam while it was 0.5 C n Parliar. Increase in temperature, decrease in bright sunshine hours a skewed rainfall were observed at some of the traditional rubber growing locations.