What the Weather is Like in March and April in Ennis, MT

By John Way
/ 9th January 2026

March: Still Winter… But the River Starts Waking Up

March in Ennis is usually a mix of cold mornings and slightly longer afternoons. Average highs are generally in the low 40s, with lows down near the teens. Snow is still common, and you’ll see your share of windy days.

That said — even on the colder days — the river starts to shift. Daylight increases, the sun gets higher, and the fish begin sliding into spring patterns.

April: Transition Month

April is where things start moving fast. Average highs climb into the 50s, lows hover around the 20s, and you’ll get a mix of rain, snow, sunshine, and everything in between.

It’s not constant warmth — but it’s enough that water temperatures begin ticking upward, and trout respond quickly.

Why March and April are Great for Madison River Fly Fishing

1) Less Pressure = Better Fishing

One of the biggest advantages of early spring is that the river is quiet. There aren’t many boats. Wade anglers are spread out. And trout don’t see nearly as many flies as they will in June and July.

Spring fishing on the Madison is known for minimal pressure and big opportunities, especially for anglers who want a real Montana river experience without the summer traffic.

2) Trout are Hungry (and More Predictable Than You’d Think)

Trout spend the winter conserving energy. As March and April progress, their metabolism starts to ramp up and they begin feeding more consistently. Fishing improves noticeably as the days lengthen and water temps rise.

Even when the weather is unsettled, you can still have great days — especially with the right approach.

3) Spring Bugs Start Showing Up

Early season hatches aren’t the giant, headline-maker hatches of summer — but they can be very real.

In April, the Madison sees reliable Blue Winged Olive (BWO) and March Brown activity depending on the weather and water temps.

And then right on the edge of late April into early May, the famous Mother’s Day Caddis starts knocking on the door on the lower river.

If you’ve never seen a caddis hatch bring fish up in waves, spring is your chance.

Springtime Madison River Tactics (Guide-Style Simple)

Nymphing Is King in March

March is usually about:

nymphing deeper runs
fishing slower water
looking for midday feeding windows

If you’re new to the Madison, this is one of the best times to fish with a guide because a little help with water reading goes a long way.

April Adds Dry Fly Opportunities

April still offers strong nymphing and streamer fishing, but more consistent bug activity opens the door for:

BWO dry fly windows
emerger fishing
occasional “surprise” surface days

And when the weather hits right — sunny with a little cloud cover — you can have those classic early spring afternoons that feel like the river is changing right in front of you.

Why It’s a Great Time to Visit Ennis (Even Beyond Fishing)

March and April are what we call “real Montana” months. It’s quieter. The valley opens up. The mountains are still white. The town isn’t rushed.

Here’s why people love visiting this time of year:

1) The Valley Is Wide Open

You get those big skies and open-road drives without summer crowds. It’s a great time for:

scenic drives through the Madison Valley
photography
watching the weather roll through the mountains

2) Wildlife Viewing Is Excellent

Spring is active. It’s common to see:

bald eagles
deer and elk moving through the valley
early migrating birds

And because there are fewer people around, wildlife tends to hold closer to the river corridors.

3) Quick Day Trips

If you’re staying in Ennis, you can easily spend off-days exploring:

Virginia City & Nevada City (historic Montana)
Ennis Lake
hot springs in the region (depending on your route)

And if you want to make a full fishing-and-exploring trip, March and April are a great time to base yourself here and bounce between towns without summer traffic.

What to Pack for Spring Fishing in Ennis

Spring in Ennis is about being ready for anything — because you’ll probably get it.

Here’s what we recommend:

warm layers (base layer + fleece + shell)
a good rain jacket
gloves and a warm hat for mornings
polarized glasses (sun and glare can be intense even in cold weather)
a thermos of coffee doesn’t hurt

And if you don’t want to worry about packing the “right” flies or gear, you can always stop into The Tackle Shop and we’ll get you lined out based on current conditions.

Why Fish with The Tackle Shop in March and April?

Early season fishing is where experience matters most.

Flows, water temps, weather, and hatch timing change week to week — sometimes day to day. This is exactly where a guide makes the biggest difference. Our guides have been fishing the Madison for decades, and they know how to adjust when spring throws its usual curveballs.

If you want to learn more about what spring fishing looks like, or plan a trip, check out:
✅ Montana Guided Fly Fishing Trips
✅ Book a Guided Fly Fishing Trip

Spring is Quiet, Wild, and Full of Opportunity

March and April might not be the months people brag about at the bar — but they’re the months locals look forward to. Quiet water, hungry trout, and the first signs of spring.

If you want a true Montana experience — the kind where the weather keeps you honest and the fishing surprises you — this is the time to come.