Monthly means range from in December to in July, but high temperatures typically peak in June before the monsoon arrives, while daily low temperatures typically peak in July or early August with the higher humidity the monsoon brings (translating to warmer nights). On average, 52 night lows are at or below freezing, with 109 days of + highs and 20 days of + highs annually; extremely rarely do temperatures stay below the freezing mark all day. The city's record high is on June 30, 1994, and its record low is on January 11, 1962; the highest daily minimum was on July 1 and 3, 1994, with weather records for the area maintained by the National Weather Service since 1879.