January in Llandrindod Wells is the windiest and the coldest month of the year. In January, the weather in Llandrindod Wells is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Llandrindod Wells has 23 rainy, 4 sunny, 3 cloudy, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Llandrindod Wells.