Ukiah has a hot-summer Mediterranean climate. Average rainfall for the area is 36.96 in (939 mm) per year. Measurable precipitation occurs on an average of 82.1 days per year. The greatest monthly precipitation was 24.76 in (628.9 mm) in January 1995 and the greatest 24-hour precipitation was 6.18 in (157.0 mm) on December 22, 1964. Light snowfall occurs about every other year.