The author (as a part of his Masters Dissertation at the University of Birmingham) attempted to analyse the weather data for Odisha State to find out the trend, if any, on the climate variables and also to see correlation with the production of major crops. Analysis of the weather data, mainly rainfall (precipitation) figures for all districts since 1901 and temperature data since 1931 (till 2010) was made. Crop production data (for the wet, Kharif season) for past one and half decades (period of pronounced climate change impacts) was taken for correlation and regression analysis of seasonal weather variables. These analyses presented interesting results. It empirically established that monsoon onset is getting delayed (than the normal date of onset) in the recent years that may adversely affect cropping system of the state. Mean annual precipitation (rainfall) and mean number of rainy days showed a decreasing trend over the last one century (since 1901). This would obviously disturb crop choice and crop planning. Although total amount of rainfall in a year has decreased over the years, occurrence of very heavy rainfall events in the state has increased in the recent period (last 15-20 years). Similarly, the mean annual maximum temperature has shown an increasing trend in the analysis period with a decrease in the mean annual minimum temperature. All these results call for effective planning and research, as temperature regimes greatly influence the growth pattern and productivity of rice and many other crops.