SpringPeak season ~68°F highs

Things to do in Great Falls in May

May is one of the best months to visit Great Falls, with average highs around 68°F. Blooming parks and mild days make it easy to pack in sights.

Plan a May weekend Where else in May

Best picks for May

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

1Spring blooms

Lewis and Clark National Forest

US national forest in west central Montana, from 1907 to 2015, first established in 1897 as Lewis and Clarke Forest Reserve

2Spring blooms

Giant Springs State Park

spring in Montana, United States of America

3Spring blooms

Holidays in May 2027

Memorial Day · Mon, May 31

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

Also great in May in Montana

Billings Missoula

Great Falls in May: quick answers

Is May a good time to visit Great Falls?

May is one of the best months to visit Great Falls, with average highs around 68°F. Blooming parks and mild days make it easy to pack in sights.

What is the weather like in Great Falls in May?

Average daytime highs are around 68°F, compared with 81°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 Great Falls in May?

Top picks for May: Lewis and Clark National Forest, Giant Springs State Park, Benton Lake National Wildlife Refuge, Hewitt Lake National Wildlife Refuge, Black Coulee National Wildlife Refuge.