Madison Valley Weather

The weather in Montana’s Madison Valley is as memorable as the scenery itself. Warm summer days, cool mountain evenings, colorful autumn afternoons, and snow-covered winter landscapes make every season a unique time to visit.

Whether you’re planning a Madison River fly fishing vacation, a trip to Yellowstone National Park, or simply exploring Southwest Montana, checking the local forecast before your visit will help you make the most of your stay.

Use the live weather forecast below for current conditions in Ennis and the surrounding Madison Valley.

What to Expect by Season

Spring (April–May)
Spring brings warming temperatures, green hillsides, and the start of another outstanding fly fishing season. Weather can change quickly, so packing layers is always a good idea.

Summer (June–August)
Expect warm, sunny days with low humidity and pleasantly cool evenings. Afternoon temperatures often range from the 70s into the 90s, making summer ideal for fishing, hiking, horseback riding, and Yellowstone day trips. Occasional afternoon thunderstorms help keep the valley green.

Fall (September–October)
Many locals consider autumn the best time of year. Crisp mornings, brilliant fall colors, excellent fishing, and fewer crowds create perfect conditions for exploring the Madison Valley.

Winter (November–March)
Snow blankets the surrounding mountains while Ennis remains a peaceful winter destination. Visitors enjoy wildlife viewing, photography, snowmobiling, and quiet evenings beside the fire.

Weather Tips for Your Visit

• Dress in layers throughout the year.

• Even summer mornings can be cool along the Madison River.

• Afternoon mountain thunderstorms are common during mid-summer.

• Sunscreen is recommended year-round because of Montana’s elevation. Ennis elevation is 4940′

• Keep a light rain jacket in your vehicle for changing mountain weather.

• If you’re fly fishing, weather changes often create some of the day’s best fishing opportunities.

Stay Close to Every Adventure

No matter the season, Rainbow Valley Lodge provides a comfortable home base for exploring the Madison Valley. From world-class fly fishing and Yellowstone National Park to Virginia City, Lewis & Clark Caverns, and scenic drives through Southwest Montana, every adventure begins just outside your door.

After a day enjoying Montana’s ever-changing weather, return to comfortable lodging, friendly hospitality, and spectacular mountain views at Rainbow Valley Lodge.