In June, the weather in Berwick-upon-Tweed is typically warm. Average daily high temperature in June is about 14 degrees above zero. On average, Berwick-upon-Tweed has 20 rainy, 5 cloudy, 3 sunny, and 2 partly cloudy days in June. The rains are usually moderate. June as well as January, February, May, and July is considered the most uncomfortable time to visit Berwick-upon-Tweed.