Summer days are sunny, dry and hot, with dramatic cooling at night; the average August high temperature is and the low is . Winters are cool and fairly rainy, with only occasional snow; the average January high temperature is and the low is . Grants Pass receives roughly precipitation per year, with three-quarters of it occurring between November 1 and March 31. The mild winters and dry summers support a native vegetation structure quite different from the rest of Oregon, dominated by madrone, deciduous and evergreen oak, manzanita, pine, bush chinquapin, and other species that are far less abundant further north.