Climate of Thunder Bay
Thunder Bay has a continental climate. It is warm in the summer and cold in the winter. The average annual temperature for Thunder Bay is 14° degrees and there is about 149 inch of rain in a year. It is dry for 173 days a year with an average humidity of 81% and an UV-index of 2.
Climate averages for the whole year
- Day: the average daily temperature during the day is between -9°C and 21°C
- Night:the average nighttime temperature is between -16°C and 13°C
- Rain: it rains 113 days and there is a total of approximately 380 mm rainfall
- Snow: it snows an average of 103 days per year
- Sun hours: throughout the year there are 2367 sun hours
Maximum temperature: | between -9°C and 21°C |
Warmest month: | 21°C in July |
Coldest month: | -9°C in January |
Night temperature: | between -16°C and 13°C |
Dry days: | 149 days |
Days with rain: | 113 days |
Days with snow: | 103 days |
Total rain sum: | 380 mm |
Hours of sunshine: | 2367 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for Thunder Bay.
Precipitation graph
This graph shows the average amount of rainfall per month for Thunder Bay.
Climate table of Thunder Bay
In this climate table you can see at a glance what the average weather per month is for Thunder Bay. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Thunder Bay might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°F) | 16 | 18 | 30 | 40 | 54 | 62 | 69 | 70 | 62 | 48 | 35 | 22 |
Night temp. (°F) | 4 | 6 | 18 | 29 | 39 | 46 | 53 | 55 | 48 | 39 | 26 | 13 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (inch) | 9 | 11 | 12 | 14 | 15 | 14 | 12 | 10 | 11 | 15 | 14 | 12 |
Days with rain | 4 | 4 | 11 | 10 | 13 | 13 | 12 | 11 | 10 | 11 | 9 | 5 |
Days with snow | 21 | 20 | 17 | 10 | 1 | - | - | - | - | 2 | 12 | 20 |
Dry days | 6 | 4 | 3 | 10 | 17 | 17 | 19 | 20 | 20 | 18 | 9 | 6 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 3 | 4 | 5 | 7 | 9 | 11 | 11 | 10 | 8 | 6 | 4 | 3 |
Wind force (Bft) | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 |
UV-index | 1 | 1 | 1 | 2 | 3 | 4 | 5 | 5 | 3 | 2 | 1 | 1 |
Best time to visit Thunder Bay
The best time to visit Thunder Bay in Canada is in July and August. In this period you have a pleasant temperature and almost no precipitation. The highest average temperature in Thunder Bay is 70°F in August and the lowest is 16°F in January.
Climate of Thunder Bay by month
What is the average climate in a given month for Thunder Bay? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
Thunder Bay weather experiences
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