Planning for the weather is a good way to make your trip to Ainsworth Hot Springs relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 61°F, while the coldest months are December and February with an average of 24°F. The snowiest months in Ainsworth Hot Springs are January, December, February, and March, with each month seeing an average of 7 inches of snowfall.