July weather forecastThunder Bay, Canada

July

Weather in July

July is the warmest month in Thunder Bay, with temperatures reaching up to 24.3°C (75.7°F). Despite the heat, July also sees its fair share of rain with 87mm (3.43") on record. Nonetheless, the agreeable weather, combined with extended sunlight makes for ideal conditions for outdoor leisure activities. Visiting the city’s natural landmarks is particularly recommended during this month.

Temperature

In Thunder Bay, July is identified by the highest average temperatures, reaching a peak of 24.3°C (75.7°F) and a low of 11.1°C (52°F).

Rainfall

In Thunder Bay, in July, during 12.9 rainfall days, 87mm (3.43") of precipitation is typically accumulated. In Thunder Bay, during the entire year, the rain falls for 92.6 days and collects up to 547mm (21.54") of precipitation.

Snowfall

June through August are months without snowfall in Thunder Bay.

Sea temperature

In Thunder Bay, Canada, in July, the average water temperature is 7°C (44.6°F).
Note: Swimming in 7°C (44.6°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

In July, the average length of the day is 15h and 38min.
On the first day of the month, sunrise is at 6:00 am and sunset at 10:01 pm. On the last day of July, in Thunder Bay, sunrise is at 6:31 am and sunset at 9:34 pm EDT.

Sunshine

In July, the average sunshine is 8.6h.

UV index

June and July, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The UV index of 7 during July translates into the following guidance:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.

Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Thunder Bay, Canada, the average highest temperatures are observed in July, with a high of 24.3°C (75.7°F) and a low of 11.1°C (52°F).

In Thunder Bay, 24.3°C (75.7°F) is the average high-temperature and 11.1°C (52°F) is the average low-temperature during July.

In Thunder Bay, during July, the rain falls for 12.9 days and regularly aggregates up to 87mm (3.43") of precipitation.

In Thunder Bay, snow does not fall in June through August.

In Thunder Bay, Canada, the average seawater temperature in July is 7°C (44.6°F). Swimming in 7°C (44.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

The average day length in July in Thunder Bay, Canada, is 15h and 38min.

On the first day of July in Thunder Bay, sunrise is at 6:00 am and sunset at 10:01 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 9:34 pm EDT.

The average sunshine duration in July is 8.6h.

June and July, with an average maximum UV index of 7, are months with the highest UV index in Thunder Bay, Canada.

In Thunder Bay, the average daily maximum UV index in July is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J July A S O N D

Jun

July

Aug

Average high temperature

20.6°C

24.3°C

23.3°C

Average low temperature

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in July
Thunder Bay, Canada

Average high temperature in July: 24.3°C

The warmest month (with the highest average high temperature) is July (24.3°C).
The month with the lowest average high temperature is January (-8°C).

Average low temperature in July: 11.1°C

The month with the highest average low temperature is July (11.1°C).
The coldest month (with the lowest average low temperature) is January (-20.6°C).

Average rainfall in July
Thunder Bay, Canada

Average rainfall in July: 87mm

The wettest month (with the highest rainfall) is August (89.5mm).
The driest month (with the least rainfall) is January (0.4mm).

Average rainfall days in July
Thunder Bay, Canada

Average rainfall days in July: 12.9 days

The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is January (0.6 days).

Average snowfall in July
Thunder Bay, Canada

Average snowfall in July: 0mm

The month with the highest snowfall is December (389mm).
The months with the least snowfall are June, July and August (0mm).

Average snowfall days in July
Thunder Bay, Canada

Average snowfall days in July: 0 days

The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July and August (0 days).

Average sea temperature in July
Thunder Bay, Canada

Average sea temperature in July: 7°C

The best months for swimming (with the highest average sea temperature) are August and September (13°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (2°C).

Average daylight in July /
Average sunshine in July
Thunder Bay, Canada

Average daylight in July: 15h and 36min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

Average sunshine in July: 8h and 36min

The month with the most sunshine is June (Average sunshine: 8h and 42min).
The months with the least sunshine are November and December (Average sunshine: 2h and 54min).

Average UV index in July
Thunder Bay, Canada

Average UV index in July: 7

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).