In February, the weather in Hillsborough is typically freezing. Average daily high temperature in February is about zero. On average, Hillsborough has 11 sunny, 8 partly cloudy, 5 snowy, 4 cloudy, and 1 rainy day in February. The snowfalls are usually heavy. February as well as January, March, April, and May is considered the most uncomfortable time to visit Hillsborough.