Thunder Bay

City · Ontario, 🇨🇦 Canada

Population 108,843

Area 465 km²

Time zone America/Thunder_Bay, America/Toronto

Thunder Bay

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Thunder Bay — Map

Thunder Bay — Map

Climate & when to visit

Best time to visit: July, August

Select a month

Typical weather in January

Poor

-9° (feels like -15°) · extremes -28°–1°
-16° at night
8 rainy days
1 sunny day
3 hours of sunshine per day
Dry air
Light breeze
1°C · too cold to swim
UV index 0 · low

Typical weather in February

Poor

-7° (feels like -13°) · extremes -25°–3°
-15° at night
7 rainy days
5 sunny days
4 hours of sunshine per day
Dry air
Calm winds
0°C · too cold to swim
UV index 1 · low

Typical weather in March

Poor

-1° (feels like -6°) · extremes -20°–7°
-8° at night
8 rainy days
10 sunny days
6 hours of sunshine per day
Dry air
Calm winds
0°C · too cold to swim
UV index 2 · low

Typical weather in April

Poor

5° (feels like 1°) · extremes -9°–13°
-2° at night
10 rainy days
11 sunny days
7 hours of sunshine per day
Dry air
Calm winds
1°C · too cold to swim
UV index 4 · moderate

Typical weather in May

Fair

12° (feels like 9°) · extremes -1°–21°
4° at night
11 rainy days
12 sunny days
8 hours of sunshine per day
Dry air
Calm winds
2°C · too cold to swim
UV index 5 · moderate

Typical weather in June

Good

18° (feels like 17°) · extremes 6°–24°
11° at night
12 rainy days
11 sunny days
9 hours of sunshine per day
Dry air
Calm winds
5°C · too cold to swim
UV index 6 · high

Typical weather in July

Great

23° (feels like 22°) · extremes 11°–28°
15° at night
11 rainy days
12 sunny days
9 hours of sunshine per day
Comfortable humidity
Calm winds
11°C · too cold to swim
UV index 6 · high

Typical weather in August

Great

22° (feels like 21°) · extremes 12°–27°
16° at night
10 rainy days
12 sunny days
8 hours of sunshine per day
Comfortable humidity
Calm winds
16°C · too cold to swim
UV index 5 · moderate

Typical weather in September

Good

18° (feels like 16°) · extremes 6°–25°
12° at night
11 rainy days
10 sunny days
6 hours of sunshine per day
Dry air
Light breeze
15°C · too cold to swim
UV index 4 · moderate

Typical weather in October

Poor

10° (feels like 6°) · extremes -1°–19°
5° at night
11 rainy days
7 sunny days
4 hours of sunshine per day
Dry air
Light breeze
10°C · too cold to swim
UV index 2 · low

Typical weather in November

Poor

3° (feels like -2°) · extremes -12°–11°
-2° at night
9 rainy days
3 sunny days
3 hours of sunshine per day
Dry air
Light breeze
6°C · too cold to swim
UV index 1 · low

Typical weather in December

Poor

-5° (feels like -10°) · extremes -23°–4°
-11° at night
10 rainy days
2 sunny days
2 hours of sunshine per day
Dry air
Light breeze
4°C · too cold to swim
UV index 0 · low

Climate data: NASA POWER + Copernicus ERA5-Land and ERA5 · 1996–2025

Practical information

Currency: Canadian Dollar CAD $ · Card payments · Widely accepted
Emergency numbers: 911
Electricity: Type A / Type B
120 V · 60 Hz

Languages: English, French
Tap water: Safe to drink
Driving side: Right
Calling code: +1

Tours & Activities

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