Weather in Thunder Bay in April

Thunder Bay, Canada averages a high of 5.3°C (41.5°F) and low of -2.2°C (28°F) in April, with 9 rain days and 9.9 hours of daily sunshine. Travel score: 58.5/100 (Mixed). The best time to visit Thunder Bay is August.

High
5°C42°F
Low
-2°C28°F
🌧️
9
rain days
☀️
9.9
hrs/day sunshine
💧
72%
humidity
59— Mixed

April in Thunder Bay is cold and occasionally wet — mixed conditions — plan indoor alternatives.

JanFebMarAprMayJunJulAugSepOctNovDec

What are the average temperatures in Thunder Bay?

JanFebMarApr5°-2°MayJunJulAugSepOctNovDec

How much does it rain in Thunder Bay in April?

Thunder Bay receives an average of 59.7mm of rainfall across 9 rainy days in April. The annual total is 654.6mm.

JanFebMarApr9dMayJunJulAugSepOctNovDec

What should I pack for Thunder Bay in April?

Essentials

👟
Comfortable walking shoes
Essential for exploring the city
🧥
Warm coat
Cool weather with highs around 5°C
🧶
Sweaters and warm layers
Layer up for comfort
🧤
Warm gloves
Cold nights around -2°C
🧣
Warm scarf
Protect against cold winds

🎉Visiting Canada in April?

Don't miss any public holidays — check before you book!

→ See Canada holidays 2026→ See long weekends in Canada

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How can I plan my trip to Thunder Bay?

Best Time to Visit Canada

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Where Is Hot in April?

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What are other popular cities in Canada?

Toronto

April

10°
60
Good

Montréal

April

10°
59
Mixed

Calgary

April

10°
67
Good

Ottawa

April

11°
62
Good

Edmonton

April

9°
68
Good

What is the weather like in other months in Thunder Bay?

January
-9°
6 rain days
43
February
-8°
5 rain days
48
March
-1°
6 rain days
50
May
13°
10 rain days
67
June
19°
10 rain days
75
July
23°
10 rain days
81
August
22°
9 rain days
82
September
18°
10 rain days
73
October
10°
10 rain days
57
November
3°
7 rain days
46
December
-4°
7 rain days
38

Data based on 1994–2024 averages · Last updated: 2024-12-31