Abstract: In order to enhance the degree of the precision of weather forecast,the research carry on the spatial interpolation algorithm．Joined the time series in the spatio-temporal interpolation,it was more accordance with the spatial and temporal characteristics of meteorological elements,and solved the lack of real-time data caused by a variety of force majeure from the source(such as instrument meteorological site failure,transmission line failure,etc.)．Based on the observation data of over 900weather stations in Chongqing of nearly a year,it conducted a comparative study of interpolation methods,and confirmed the feasibility of the algorithm.

Key words: Time series,Spatio-temporal interpolation,Meteorological elements,Real-time prediction