CanadaAverage weather for Thunder Bay in August
It's warm in August in Thunder Bay with an average temperature of 23°C. Temperatures this month range from a low of 20°C to a high of 26°C. At night, you can expect temperatures between 10°C and 14°C.
Start of August
The month of August starts in Thunder Bay with warm temps, averaging around 25°C during the day and nights around 14°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid August
By mid-August, daytime temps drop to around 24°C, with nights around 13°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of August
By the end of August, the average daytime temperature in Thunder Bay is around 22°C, while nighttime temps are about 13°C. A shower might pop up, but overall, the weather will be dry and sunny.
In August, there is an average of 67 mm of precipitation, spread over 10 days. The wind speed is around 4 Bft, mostly coming from the South.
Thunder Bay in August |
New York | ||
|---|---|---|---|
 Average temperature |
23°C | 30°C | |
 Max. temperature |
26°C | 31°C | |
| Min. temperature |
20°C | -5°C | |
 Total precipitation |
67 mm | 79 mm | |
| Rainy days |
10 days | 13 days | |
July
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit Thunder Bay?
Looking for great weather? August is a good time to be in Thunder Bay. The temperatures are nice, and there’s not too much rain.
Temperature records
With 31°C in 2015, Thunder Bay reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 13°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 2°C to a highest value of 20°C.
Check out the climate of Thunder Bay for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Daily Temperature in August in Thunder Bay
This chart shows the average daily high and low temperatures in August for Thunder Bay, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in Thunder Bay
The chart below shows the average daily precipitation in August for Thunder Bay, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for August, you can expect about 10 days of precipitation in Thunder Bay.
Daily UV index in August in Thunder Bay
This chart shows the average daily UV index in August in Thunder Bay, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Thunder Bay over the years
This chart shows the average temperature in August in Thunder Bay, measured in degrees Celsius, over the past few years.
Total precipitation in August in Thunder Bay over the years
This chart shows the average precipitation in August in Thunder Bay, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in August for Thunder Bay
Click on any day in August to get detailed info about the usual weather on that day in Thunder Bay. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Thunder Bay
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Average weather in Thunder Bay by month
Click on a month below to see detailed weather info for Thunder Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Thunder Bay for all months at once
