If you travel to different regions of the province, you will confront various views, which show the variety of climatic conditions throughout the province. Khorasan Razavi is considered as dry and semi-dry areas of the country but under the effects of different geographical factors, it has ecological variety. The highlands have cold winters, temperate summers, and the lowlands have relatively cold winters, warm, and dry summers. The effective factors in the ecological variety are latitude or the difference of sun’s radiation angle in different areas of the province and the difference between the highest and the lowest areas of the province, which reaches to 3000 meters and different air masses, which cause main climatic changes.