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When to Visit Duluth

Climate guide & best times to travel

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Monthly Climate Data for Duluth Average temperature and rainfall by month Climate Overview -21°C -8°C 4°C 17°C 30°C Rainfall (mm) 0 55 111 Jan Jan: -6.0°C high, -16.0°C low, 23mm rain Feb Feb: -4.0°C high, -14.0°C low, 25mm rain Mar Mar: 2.0°C high, -7.0°C low, 38mm rain Apr Apr: 9.0°C high, -1.0°C low, 64mm rain May May: 17.0°C high, 5.0°C low, 86mm rain Jun Jun: 22.0°C high, 10.0°C low, 112mm rain Jul Jul: 25.0°C high, 13.0°C low, 99mm rain Aug Aug: 24.0°C high, 12.0°C low, 94mm rain Sep Sep: 19.0°C high, 8.0°C low, 89mm rain Oct Oct: 11.0°C high, 2.0°C low, 74mm rain Nov Nov: 2.0°C high, -5.0°C low, 51mm rain Dec Dec: -4.0°C high, -12.0°C low, 38mm rain Temperature Rainfall
Duluth perches at the western tip of Lake Superior. This single fact creates a climate unlike any other in the continental United States. The lake is a colossal thermal buffer. It cools summers that would otherwise scorch and softens winter's bite compared with inland Minnesota. "Softened" is relative. Duluth runs cold. January regularly bottoms out at -16°C (2°F). July highs seldom pass 25°C (77°F). Arrive from a southern state and the contrast stings. Every season. Lake effect defines Duluth weather. Summer fog rolls in off Superior on otherwise clear days. Autumn storms intensify when warm air slams into the cooling surface. Winter lake-effect snow can bury Canal Park with little warning. Rainfall stays steady year-round, peaking in June at 112mm and shrinking to under 25mm in January. Most of that winter moisture falls as snow. The year splits into two long acts with quick scene changes. Winter rules November through March. Long. Dark. Cold. Yet striking if you own proper gear. Summer is short, June through August, and fiercely sweet. Spring and fall are pure transition. Temperatures swing day by day. Superior stays frigid long after the calendar claims warmth.

Best Time to Visit

Recommended timing for different travel styles.

Beach
July and August are the only realistic months. Highs hit 24-25°C (75-77°F). Evenings stay pleasant. Superior's surface, always cold, edges toward swimmable. Briefly. Duluth's public beaches see action.
Cultural
September and October reward visitors handsomely. Crowds vanish after Labor Day. Fall foliage along the North Shore dazzles. Galleries, historic sites, Canal Park attractions feel roomy. Temperatures hover 11-19°C (52-67°F). Perfect walking weather.
Adventure
June balances workable temperatures with open trails. Waterfalls along the Superior Hiking Trail increase with spring snowmelt. Northern daylight stretches forever. You can cover miles before July crowds arrive.
Budget
March and November sit quiet. Rates drop sharply. The city never empties. But the pace slows. Shoulder season feels calm. Pack for real cold either month.

What to Pack

Essentials and seasonal recommendations for Duluth.

Year-Round Essentials
A waterproof outer shell
Rainfall and lake spray hit every month. Duluth weather flips fast. Pack for wet and wind anytime.
Comfortable walking shoes with solid grip
Duluth rewards grippy soles. The hillside terrain and Canal Park area punish slick shoes. Bring traction or regret it.
Sunglasses
Sunglasses matter more than you think. The glare off Lake Superior's surface is fierce. Winter snow doubles the burn.
A reusable water bottle
worth having since the tap water draws from Lake Superior and is excellent.
Some form of mid-layer - a fleece or light insulating piece
Pack a jacket even in July. Evenings at 13°C (56°F) off the lake bite. A light fleece saves the night.
Winter
Clothing
A down or synthetic-insulated parka rated well below freezing, merino wool base layers, a hat that covers the ears
Footwear
waterproof insulated boots
Accessories
mittens over gloves
Layering Tip
Wind chill on the lakefront slashes the feels-like temperature far below the actual reading. Cotton layers fail here. Bring windproof gear.
Spring and Fall
Clothing
A waterproof mid-weight jacket, a wool or fleece sweater
Footwear
waterproof hiking boots
Layering Tip
Flexibility rules. A warm afternoon can swing to a cold evening. Layer up, layer down.
Summer
Clothing
lighter clothing, quick-dry fabrics
Accessories
A packable rain jacket, a warm layer for evenings
Layering Tip
Plan to use the warm layer more than you might expect.
Plug Type
Type An and Type B
Voltage
120V, 60Hz
Adapter Note
Europe, Australia, and most of Asia need a plug adapter. Check dual voltage on devices. New laptops and phone chargers usually handle it. Old hair dryers may fry.
Skip These Items
Skip the full-size umbrella. Duluth's lake wind flips it inside out. A waterproof hood or packable jacket wins. Sandals alone will fail even in July. Mornings, evenings, and the lakefront all demand real shoes. Pack sneakers or boots. Heavy cotton layers in winter soak up moisture and stay wet. Cold humid air is Duluth's specialty. Switch to wool or synthetic. Leave the tux at home. Duluth stays casual year-round unless you have a specific event. Jeans and a sweater fit right in.
Full Packing Checklist

Interactive checklist with shopping links for every item you need.

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Month-by-Month Guide

Climate conditions and crowd levels for each month of the year.

January

Duluth is as cold as it gets. Highs hover near -6°C (19°F). Lows can dive to -16°C (2°F). About 23mm of precipitation falls, mostly as snow. The city does not shut down. It downshifts. Frozen harbor. Ice-armored breakwaters. The scene is haunting and beautiful.

High -6°C (19°F)
Low -16°C (2°F)
Rainfall 23mm
Crowds lowest of the year
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February

Little warmth. But longer days. Highs of -4°C (24°F). Lows still sink to -14°C (6°F). Around 25mm of precipitation. On clear days the light over Superior's ice shelf is memorable. Dress for it.

High -4°C (24°F)
Low -14°C (6°F)
Rainfall 25mm
Crowds very low
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March

The first hint of change. Highs inch to 2°C (36°F) by month's end. Mornings stay brisk at -7°C (17°F). Snowmelt plus rain push precipitation to 38mm. Sections of the Superior Hiking Trail reopen when conditions allow.

High 2°C (36°F)
Low -7°C (17°F)
Rainfall 38mm
Crowds low
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April

Pure transition, both good and risky. Average highs of 9°C (49°F). Variance is wide. A warm week can flip to late snow. Lows linger near -1°C (29°F). 64mm of rain makes this one of the wetter months.

High 9°C (49°F)
Low -1°C (29°F)
Rainfall 64mm
Crowds low toward medium by late April
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May

Spring finally shows up. Highs reach 17°C (62°F). Lows settle at 5°C (41°F). 86mm of rainfall tops the year so far. North Shore trails dry out. Birdwatching along the lakeshore peaks.

High 17°C (62°F)
Low 5°C (41°F)
Rainfall 86mm
Crowds medium
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June

Summer kicks off and Duluth celebrates. Highs of 22°C (72°F) and lows around 10°C (50°F) feel perfect. June is the rainiest month at 112mm. Fog can roll in fast. Evenings stretch forever. Northern light is memorable.

High 22°C (72°F)
Low 10°C (50°F)
Rainfall 112mm
Crowds medium-high by late in the month
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July

Peak season. Highs hit 25°C (77°F). Lows stay near 13°C (56°F). Warmest Duluth ever gets. Canal Park buzzes. Beaches fill with regional visitors. Events calendar overflows.

High 25°C (77°F)
Low 13°C (56°F)
Rainfall None
Crowds high
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August

Barely cooler than July. Highs of 24°C (75°F), lows of 12°C (55°F). 94mm of rainfall. Lake surface temperature peaks in August. Still cold by most standards. Late August hints at autumn. That shift has its own charm.

High 24°C (75°F)
Low 12°C (55°F)
Rainfall 94mm
Crowds high
View Details →
September

Many seasoned travelers call this the best month. Highs of 19°C (67°F) and lows of 8°C (47°F) deliver crisp, clear days. First foliage flames across the ridgeline above town. Crowds thin after Labor Day. 89mm of rain keeps things green.

High 19°C (67°F)
Low 8°C (47°F)
Rainfall 89mm
Crowds medium
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October

Highs of 11°C (52°F) and lows of 2°C (35°F) demand a real jacket. Skies stay bright and sharp. Fall color peaks early October along the North Shore. 74mm of rain is manageable. Photographers love this month.

High 11°C (52°F)
Low 2°C (35°F)
Rainfall 74mm
Crowds low to medium
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November

Winter storms back in. Highs of 2°C (37°F) and lows of -5°C (22°F) arrive with early snow by mid-month. 51mm of precipitation. Superior turns theatrical. Big waves. Frequent storms. Dramatic skies over the harbor.

High 2°C (37°F)
Low -5°C (22°F)
Rainfall 51mm
Crowds low
View Details →
December

Full winter. Highs around -4°C (24°F). Lows drop to -12°C (9°F). Snow is steady and deep. Holiday lights glow along Canal Park. Bentleyville draws visitors for the season's sparkle.

High -4°C (24°F)
Low -12°C (9°F)
Rainfall None
Crowds low outside of specific holiday weekends
View Details →

Ready to plan your trip to Duluth?

Now that you've got the research covered, here's where to go next.

Top Things to Do

Curated attractions, tours, and experiences in Duluth.

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Where to Stay

Best neighbourhoods and hotels for every budget.

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What to Pack

Climate-specific gear and essentials for Duluth.

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Continue Planning Your Trip

Packing List

What to bring on your trip for Duluth

When to Visit

Best times to travel for Duluth

Budget Guide

Trip costs and money tips for Duluth