October in Ashburton is the rainiest month of the year. In October, the weather in Ashburton is typically warm. Average daily high temperature in October is about 16 degrees above zero. On average, Ashburton has 14 rainy, 8 sunny, 7 partly cloudy, and 2 cloudy days in October. The rains are usually heavy. October as well as May, June, July, and August is considered the most uncomfortable time to visit Ashburton.