If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Basalt: The hottest months are usually July and August, with an average temperature of 16°C, while the coldest months are January and December, with an average of -6°C. The snowiest months in Basalt are February, March, January and December, with each month seeing an average of 38 cm of snowfall.