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.
TheODPsupreme t1_iuhdymt wrote
Reply to ELI5 - How do puddles evaporate if water turns to gas at 100 Celsius? by takeonme02
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.