June in Hartford is the rainiest month of the year. In June, the weather in Hartford is typically warm. Average daily high temperature in June is about 18 degrees above zero. On average, Hartford has 19 rainy, 5 sunny, 3 cloudy, and 3 partly cloudy days in June. The rains are usually moderate. June as well as January, February, March, and April is considered the most uncomfortable time to visit Hartford.