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Thunder Bay Weather in April
April in Thunder Bay brings low temperatures, with highs of 6°C (43°F) and nights dropping to -3°C (27°F). Rainfall is on the higher side this month, averaging around 62 mm (2.4 in), so keep a rain jacket handy.
Rainfall in Thunder Bay in April
Past climate data indicates that roughly 9 days will see snow/rain, totalling around 62 mm (2.4 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Thunder Bay in April
April in Thunder Bay brings typical temperatures with highs around 6°C (43°F) and lows of -3°C (27°F). The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With overnight lows of -3°C (27°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.April in Thunder Bay has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Thunder Bay Temperature in April
Min Temperature
-3°C (27°F)
Max Temperature
6°C (43°F)
Chance of Rain
29%
Precipitation
62 mm (2.4 in)
Rainy days
9 days
Thunder Bay Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Thunder Bay - and find the best time to visit.
Best Places in Canada in April
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in April →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Thunder Bay in April
Dress warmly and in layers for your trip to Thunder Bay in April. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days.
What To Do in Thunder Bay in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling4/10 -
Walking4/10 -
Barbeque1/10 -
Camping1/10 -
Outdoor sports4/10
Thunder Bay 3-Day Forecast
More climate data for Thunder Bay
See the full Thunder Bay climate overview or explore weather in Canada.
Popular in April
Where to go in April - average daytime high across popular destinations.
Niagara Falls
13°C (55°F) Ottawa
12°C (54°F) Vancouver
12°C (54°F) Montréal12°C (54°F) Calgary12°C (54°F) Toronto10°C (50°F) Quebec City
9°C (48°F) Whistler6°C (43°F) Bucket list
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