Traditional methods of weather modification are based on the impact on cloud condensation nuclei; whereas, modern methods of weather modification are based on the increase of cloud condensation nuclei. In modern methods of weather modification, the use of nanoparticles to increase cloud condensation nuclei is main challenge. At present research, Silica nanoparticles with a mean size of less than 50 nm and with a non-structured structure have been used to investigate the evaporation process. The results show that the Silica nanoparticles slow down the evaporation trend at temperatures close to zero in degrees Celsius. Therefore, Silica nanoparticles can increase the amount of condensation nuclei and thus slow down the evaporation trend.