January in Pamplona is the cloudiest and the coldest month of the year. In January, the weather in Pamplona is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Pamplona has 20 rainy, 5 sunny, 4 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Pamplona.