Thunder Bay Climate (Weather Averages)

The Climate Guide for Thunder Bay, Ontario is perfect for planning your holiday. Monthly weather averages give the best indication of what the weather is usually like for every month of the year including figures for temperature, rainfall and sunshine.

Thunder Bay Weather Ontario Summary Thunder Bay Climate Thunder Bay Today Thunder Bay Forecast Thunder Bay When Best
Thunder Bay Weather Ontario Summary Thunder Bay Climate Thunder Bay Today Thunder Bay Forecast Thunder Bay When Best
J F M A M J J A S O N D
Max Daytime Temperature (°C) -9°C (16°F) Max Daytime Temperature in January in Thunder Bay -6°C (21°F) Max Daytime Temperature in February in Thunder Bay 0°C (32°F) Max Daytime Temperature in March in Thunder Bay 8°C (46°F) Max Daytime Temperature in April in Thunder Bay 16°C (61°F) Max Daytime Temperature in May in Thunder Bay 21°C (70°F) Max Daytime Temperature in June in Thunder Bay 25°C (77°F) Max Daytime Temperature in July in Thunder Bay 23°C (73°F) Max Daytime Temperature in August in Thunder Bay 17°C (63°F) Max Daytime Temperature in September in Thunder Bay 11°C (52°F) Max Daytime Temperature in October in Thunder Bay 2°C (36°F) Max Daytime Temperature in November in Thunder Bay -6°C (21°F) Max Daytime Temperature in December in Thunder Bay
Min Night-time Temperature (°C) -22°C (-8°F) Min Night-time Temperature in January in Thunder Bay -20°C (-4°F) Min Night-time Temperature in February in Thunder Bay -13°C (9°F) Min Night-time Temperature in March in Thunder Bay -4°C (25°F) Min Night-time Temperature in April in Thunder Bay 2°C (36°F) Min Night-time Temperature in May in Thunder Bay 7°C (45°F) Min Night-time Temperature in June in Thunder Bay 11°C (52°F) Min Night-time Temperature in July in Thunder Bay 10°C (50°F) Min Night-time Temperature in August in Thunder Bay 5°C (41°F) Min Night-time Temperature in September in Thunder Bay 1°C (34°F) Min Night-time Temperature in October in Thunder Bay -7°C (19°F) Min Night-time Temperature in November in Thunder Bay -16°C (3°F) Min Night-time Temperature in December in Thunder Bay
Hours of Sunshine (Daily) 4 Hours of Bright Sunshine per day (42% of Daylight Hours) in January in Thunder Bay 5 Hours of Bright Sunshine per day (47% of Daylight Hours) in February in Thunder Bay 5 Hours of Bright Sunshine per day (44% of Daylight Hours) in March in Thunder Bay 7 Hours of Bright Sunshine per day (54% of Daylight Hours) in April in Thunder Bay 8 Hours of Bright Sunshine per day (55% of Daylight Hours) in May in Thunder Bay 9 Hours of Bright Sunshine per day (54% of Daylight Hours) in June in Thunder Bay 10 Hours of Bright Sunshine per day (61% of Daylight Hours) in July in Thunder Bay 8 Hours of Bright Sunshine per day (58% of Daylight Hours) in August in Thunder Bay 5 Hours of Bright Sunshine per day (42% of Daylight Hours) in September in Thunder Bay 4 Hours of Bright Sunshine per day (36% of Daylight Hours) in October in Thunder Bay 3 Hours of Bright Sunshine per day (32% of Daylight Hours) in November in Thunder Bay 3 Hours of Bright Sunshine per day (35% of Daylight Hours) in December in Thunder Bay
Hours of Daylight (Daily) 9 Hours of Daylight in January in Thunder Bay 10 Hours of Daylight in February in Thunder Bay 12 Hours of Daylight in March in Thunder Bay 14 Hours of Daylight in April in Thunder Bay 15 Hours of Daylight in May in Thunder Bay 16 Hours of Daylight in June in Thunder Bay 16 Hours of Daylight in July in Thunder Bay 14 Hours of Daylight in August in Thunder Bay 13 Hours of Daylight in September in Thunder Bay 11 Hours of Daylight in October in Thunder Bay 9 Hours of Daylight in November in Thunder Bay 8 Hours of Daylight in December in Thunder Bay
Heat and Humidity Discomfort No Heat & Humidity in January in Thunder Bay No Heat & Humidity in February in Thunder Bay No Heat & Humidity in March in Thunder Bay No Heat & Humidity in April in Thunder Bay No Heat & Humidity in May in Thunder Bay No Heat & Humidity in June in Thunder Bay No Heat & Humidity in July in Thunder Bay No Heat & Humidity in August in Thunder Bay No Heat & Humidity in September in Thunder Bay No Heat & Humidity in October in Thunder Bay No Heat & Humidity in November in Thunder Bay No Heat & Humidity in December in Thunder Bay
Days with some Rainfall 11 Days with some Rainfall in January in Thunder Bay 9 Days with some Rainfall in February in Thunder Bay 10 Days with some Rainfall in March in Thunder Bay 9 Days with some Rainfall in April in Thunder Bay 11 Days with some Rainfall in May in Thunder Bay 13 Days with some Rainfall in June in Thunder Bay 12 Days with some Rainfall in July in Thunder Bay 13 Days with some Rainfall in August in Thunder Bay 13 Days with some Rainfall in September in Thunder Bay 11 Days with some Rainfall in October in Thunder Bay 10 Days with some Rainfall in November in Thunder Bay 11 Days with some Rainfall in December in Thunder Bay
Monthly Rainfall (mm) 43 mm (1.7 inches) Monthly Rainfall in January in Thunder Bay 30 mm (1.2 inches) Monthly Rainfall in February in Thunder Bay 44 mm (1.7 inches) Monthly Rainfall in March in Thunder Bay 46 mm (1.8 inches) Monthly Rainfall in April in Thunder Bay 71 mm (2.8 inches) Monthly Rainfall in May in Thunder Bay 81 mm (3.2 inches) Monthly Rainfall in June in Thunder Bay 78 mm (3.1 inches) Monthly Rainfall in July in Thunder Bay 86 mm (3.4 inches) Monthly Rainfall in August in Thunder Bay 84 mm (3.3 inches) Monthly Rainfall in September in Thunder Bay 63 mm (2.5 inches) Monthly Rainfall in October in Thunder Bay 56 mm (2.2 inches) Monthly Rainfall in November in Thunder Bay 43 mm (1.7 inches) Monthly Rainfall in December in Thunder Bay
UV Index (Maximum) UV (Maximum) Index 1 (Low) in January in Thunder Bay UV (Maximum) Index 1 (Low) in February in Thunder Bay UV (Maximum) Index 3 (Moderate) in March in Thunder Bay UV (Maximum) Index 4 (Moderate) in April in Thunder Bay UV (Maximum) Index 6 (High) in May in Thunder Bay UV (Maximum) Index 7 (High) in June in Thunder Bay UV (Maximum) Index 7 (High) in July in Thunder Bay UV (Maximum) Index 6 (High) in August in Thunder Bay UV (Maximum) Index 5 (Moderate) in September in Thunder Bay UV (Maximum) Index 2 (Low) in October in Thunder Bay UV (Maximum) Index 1 (Low) in November in Thunder Bay UV (Maximum) Index 1 (Low) in December in Thunder Bay
Sea Temperature (°C) 2°C (36°F) Sea Temperature in January in Thunder Bay 2°C (36°F) Sea Temperature in February in Thunder Bay 2°C (36°F) Sea Temperature in March in Thunder Bay 2°C (36°F) Sea Temperature in April in Thunder Bay 3°C (37°F) Sea Temperature in May in Thunder Bay 4°C (39°F) Sea Temperature in June in Thunder Bay 7°C (45°F) Sea Temperature in July in Thunder Bay 13°C (55°F) Sea Temperature in August in Thunder Bay 13°C (55°F) Sea Temperature in September in Thunder Bay 8°C (46°F) Sea Temperature in October in Thunder Bay 5°C (41°F) Sea Temperature in November in Thunder Bay 4°C (39°F) Sea Temperature in December in Thunder Bay
J F M A M J J A S O N D
 		    
 

Thunder Bay Climate Zone

Thunder Bay has a cold climate with warm summers and some rainfall in all months.
Thunder Bay Holidays Thunder Bay Flights Thunder Bay Hotels Thunder Bay Hire Cars Thunder Bay Villas Thunder Bay Transfers
Thunder Bay Holidays Thunder Bay Flights Thunder Bay Hotels Thunder Bay Hire Cars Thunder Bay Villas Thunder Bay Transfers

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Thunder Bay Weather by Month
Check the weather for a particular month in Thunder Bay by selecting a month from the list below. Alternatively check which month usually has the Best Weather in Thunder Bay. If you are not sure where to go, why not try our Holiday Planner.
  · January
  · February
  · March
   · April
  · May
  · June
   · July
  · August
  · September
   · October
  · November
  · December
Popular Climate Guide Regions

1.

Cyprus

2.

Tenerife, Canary Islands, Spain

3.

Tunisia

4.

Sharm el-Sheikh, Egypt

5.

Mauritius

6.

Crete, Greece

7.

Dalaman and Marmaris Coast, Turkey

8.

Cape Verde

9.

Rhodes, Greece

10.

Antalya Coast, Turkey
Popular Climate Guide Destinations

1.

Santa Cruz de Tenerife, Tenerife, Canary Islands, Spain

2.

Nicosia, Cyprus

3.

Sharm el Sheikh Airport, Sharm el-Sheikh, Egypt

4.

Tunis, Tunisia

5.

Port Louis, Mauritius

6.

Khania, Crete, Greece

7.

Dalaman, Dalaman and Marmaris Coast, Turkey

8.

Praia, Santiago, Cape Verde

9.

Rhodes Town, Rhodes, Greece

10.

Antalya, Antalya Coast, Turkey
 		    
 
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