Idaho Falls
WinterOff season ~43°F highs
Things to do in Idaho Falls in December
December is off season (quieter, and often cheaper) to visit Idaho Falls, with average highs around 43°F. Museums and indoor sights come into their own, with fewer crowds outside.
Best picks for December
What's famous here, weighted toward what shines in December.
Holidays in December 2026
- Christmas Day · Fri, Dec 25
Expect busier roads and pricier stays around these dates. See long weekends.
What’s on in Idaho Falls in December
Concerts, games and shows in the next few weeks. Tickets open on Ticketmaster.
Idaho Falls in December: quick answers
Is December a good time to visit Idaho Falls?
December is off season (quieter, and often cheaper) to visit Idaho Falls, with average highs around 43°F. Museums and indoor sights come into their own, with fewer crowds outside.
What is the weather like in Idaho Falls in December?
Average daytime highs are around 43°F, compared with 90°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.
What are the best things to do in Idaho Falls in December?
Top picks for December: Experimental Breeder Reactor I, Yellowstone National Park, The Museum of Idaho, Henrys Lake State Park, Targhee National Forest.
