Please check for normality, homogeneity, independance of the time series and you may refer to the review on trend by Sonali & Nagesh (2013).
Sonali, P. & Nagesh, D. K., 2013. Review of trend detection methods and their application to detect temperature changes in India. Journal of Hydrology, 476, 212-227.
You can refer my recently published article concerning analysis trends in extreme climatic indices for West-Central Indian region.
The article titled "Spatiotemporal trends in extreme rainfall and temperature indices over Upper Tapi Basin, India" will be hopefully useful to you in deriving inferences for Indian context.
Article Spatiotemporal trends in extreme rainfall and temperature in...