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Weather in Sudbury
Nickel mining and Lake Ramsey city
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About Sudbury
A remarkable destination worth exploring.
Best months to visit
June, July
Things to do in Sudbury
Explore
Dine
Culture
Nature
Shopping
Day trips
Weather by month
Click any month for detailed weather information and travel tips.
January
-6C
Cold, with some rainy days.
February
-6C
Cold, with some rainy days.
March
0C
Cold, with occasional showers.
April
8C
Cold, with some rainy days.
May
17C
Cool, with some rainy days.
Recommended
June
23C
Mild and comfortable, with some rainy days.
Recommended
July
25C
Warm and pleasant, with some rainy days.
August
23C
Mild and comfortable, with some rainy days.
September
19C
Mild and comfortable, with some rainy days.
October
11C
Cool, with some rainy days.
November
3C
Cold, with some rainy days.
December
-2C
Cold, with some rainy days.
Sudbury was once defined by its nickel mines and a moonscape so barren NASA reportedly trained here — but decades of land reclamation have turned it into a surprisingly green city ringed by lakes. Science North's geodesic-dome science centre and the giant roadside Big Nickel are its best-known attractions, while the surrounding boreal lakes offer canoeing and fishing right at the city's edge.
Best areas to stay in Sudbury
Downtown Sudbury
The compact commercial core along Elgin Street, with restaurants and the Sudbury Theatre Centre.
Ramsey Lake area
Home to Science North, Bell Park, and lakeside walking trails right beside downtown.
New Sudbury
A suburban commercial area with malls and chain hotels.
Copper Cliff
A historic former company town with mining heritage and the iconic Inco/Vale smelter stack visible across the area.
Getting to Sudbury
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Flights
Greater Sudbury Airport (YSB) connects to Toronto; alternatively, drive about 4 hours north from Toronto.
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From London
~10-12 hours from London via Toronto, plus a short connecting flight or drive.
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Getting around
A car is recommended, though downtown and the Ramsey Lake area around Science North are walkable.
Frequently asked questions
When is the best time to visit Sudbury?
June to September is best for the lakes and outdoor attractions; winter brings cross-country skiing and snowmobiling to the surrounding area.
How do I get around Sudbury?
A car is recommended, as the city is spread out around its lakes, though Greater Sudbury Transit serves the main areas.
What is Sudbury known for?
Its mining history — particularly nickel — and its remarkable environmental recovery, plus attractions like Science North and the Big Nickel.
What is Science North?
A major science centre built into the bedrock beside Ramsey Lake, with hands-on exhibits, an IMAX theatre, and a butterfly gallery.
Is Sudbury good for outdoor activities?
Yes — Ramsey Lake and the surrounding conservation areas offer swimming, canoeing, and extensive trail networks within the city limits.
Traveler reviews
★★★★☆
Science North was brilliant for the kids, and I loved that you can walk along Ramsey Lake right from the city centre afterwards.
Marie-Claude L. · July 2024
★★★★☆
Didn't expect Sudbury to be this green — the lakes around the city are lovely for a paddle on a summer evening.
Brian K. · August 2023
★★★☆☆
An interesting stop to learn about the mining history at the Big Nickel, and a good base for exploring the surrounding lakes.
Tammy R. · September 2023
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