WinterOff season ~23°F highs

Things to do in Idaho Falls in January

January is off season (quieter, and often cheaper) to visit Idaho Falls, with average highs around 23°F. Museums and indoor sights come into their own, with fewer crowds outside.

Plan a January weekend Where else in January

Best picks for January

What's famous here, weighted toward what shines in January.

1Indoor escape

Experimental Breeder Reactor I

breeder reactor

Yellowstone National Park

first national park in the world, located in Wyoming, Montana, and Idaho in the United States

3Indoor escape

The Museum of Idaho

history and science museum in Idaho Falls, Idaho, U.S

Holidays in January 2027

New Year's Day · Fri, Jan 1
Martin Luther King, Jr. Day · Mon, Jan 18

Expect busier roads and pricier stays around these dates. See long weekends.

Idaho Falls in January: quick answers

Is January a good time to visit Idaho Falls?

January is off season (quieter, and often cheaper) to visit Idaho Falls, with average highs around 23°F. Museums and indoor sights come into their own, with fewer crowds outside.

What is the weather like in Idaho Falls in January?

Average daytime highs are around 23°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 January?

Top picks for January: Experimental Breeder Reactor I, Yellowstone National Park, The Museum of Idaho, Henrys Lake State Park, Targhee National Forest.