TheODPsupreme t1_iuhdymt wrote on October 31, 2022 at 10:43 AM

Water starts evaporating at anything above zero Celsius at sea level and 1 atmosphere of pressure: this is because evaporation is diffusion of molecules due to differences in pressure and concentration, not just boiling. Heat speeds up the process, but is not the primary force behind this.

twotall88 t1_iuheiwc wrote on October 31, 2022 at 10:51 AM

>Water starts evaporating at anything above zero Celsius at sea level and 1 atmosphere of pressure

Water will sublime from solid form (ice/snow) well below zero Celsius (32°F). It just takes a sunny, dry day and the sun will give the water molecules enough energy to skip the liquid stage (sublimate). It can be considered evaporation loosely.