In October, the weather in Aberystwyth is typically warm. Average daily high temperature in October is about 13 degrees above zero. On average, Aberystwyth has 20 rainy, 6 partly cloudy, 3 cloudy, and 2 sunny days in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Aberystwyth.