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 Denali: The hottest months are usually July and June, with an average temperature of 10°C, while the coldest months are January and December, with an average of -16°C. The snowiest months in Denali are April, December, October and November, with each month seeing an average of 57 cm of snowfall.