Thunder Bay weather in April
Cold, with some rainy days. Average highs of 5°C and lows of -3°C, with around 10 rainy days expected throughout the month.
While April isn't our top-rated month for Thunder Bay, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
5°C
Average low
-3°C
Rainy days
10 days
Best months to visit
Year-round
What to do in Thunder Bay in April
Whatever the weather, Thunder Bay rewards curious visitors. Here are some of the best ways to spend your time:
Climb the Sleeping Giant overlooking the harbor
Kayak or paddleboard Lake Superior's calm bays
Fish for trout in nearby streams and lakes
Visit the Thunder Bay National Marine Conservation Area
Hike trails with dramatic lake and mountain views
Explore the historic waterfront and port infrastructure
What to pack for April
Pack for cold weather — a proper winter coat, thermal layers, waterproof boots, and warm accessories. You'll want a good base layer for outdoor activities.
Browse other months
January
-8C
Cold, with occasional showers.
February
-8C
Cold, with occasional showers.
March
-1C
Cold, with occasional showers.
April (you are here)
5C
Cold, with some rainy days.
May
12C
Cool, with some rainy days.
June
18C
Mild and comfortable, with some rainy days.
July
22C
Mild and comfortable, with some rainy days.
August
21C
Mild and comfortable, with some rainy days.
September
18C
Mild and comfortable, with some rainy days.
October
10C
Cool, with occasional showers.
November
3C
Cold, with occasional showers.
December
-3C
Cold, with occasional showers.
Book your April trip to Thunder Bay
Find hotels, tours and experiences for the perfect escape.
