Dear Santosh Kaini,

Today, for weather forecasting and climate we use numerical models of the atmosphere and oceans.

See links:

https://www.researchgate.net/publication/261729269_Numerical_Method_in_Meteorology_Solved_Problems

https://www.researchgate.net/publication/308986389_GLOBAL_WARMING_-_BETWEEN_THE_MYTH_AND_REALITY

Regards,

Milivoj B. Gavrilov

Book Numerical Method in Meteorology: Solved Problems

Conference Paper GLOBAL WARMING – BETWEEN THE MYTH AND REALITY

Kindly have a look here too..

https://www.skepticalscience.com/climate-models.htm

See more at here too.

http://onlinelibrary.wiley.com/doi/10.1029/2009RG000314/pdf

See more info here..

http://www.fao.org/docrep/014/i2096e/i2096e.pdf

Numerical model

regards

Dear Santosh

You can use weather generator (WG) to predict temperature and rainfall under climate change condition. Two of the most famous WG are LARS-WG and SDSM.

Thanks to all of you. I have managed to select the "Representative general circulation models and downscaling of climate data".

Article Representative general circulation models selection and down...

there are various models use for weather forecasting but it depends on your location.