On average, Hays receives of precipitation in a year with the largest share being received from May through August. The average relative humidity is 64%. There are, on average, 77 days of measurable precipitation each year. Annual snowfall averages . Measurable snowfall occurs an average of 11 days a year with at least an inch of snow being received on six of those days. Snow depth of at least an inch occurs an average of 25 days a year. Typically, the first fall freeze occurs by the second week of October, and the last spring freeze occurs by the last week of April.