If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Keene: The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and February with an average of 23°F. The snowiest months in Keene are January, December, March, and February, with each month seeing an average of 19 inches of snowfall.