Thunder Bay Weather: August
 |
Average Day Temperature: | 71.9°F |
|
Average Night Temperature: | 59.5°F |
|
Sea Water Temperature: | 64.5°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 13.4 - 15.0 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.2 in | |
| detailed information | ||
forecast
| Thunder Bay |
Temperature
| Thunder Bay |
Air Temperature in August, °F
The highest day temperature in August 2026 was 89°F. The lowest night temperature was 49°F. The average values for day and night temperatures during August were 76.2°F и 57.0°F respectivly.
Thunder Bay Water Sea Temperature in August, °F
The average sea surface temperature in August 2026 for Thunder Bay was 62.5°F. The maximum and minimum values were 57.0°F and 65.2°F respectively.
Most of the days in August are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in August, in
Precipitation total in August for Thunder Bay is 1.2 in. It makes august the most rainy month of the year.
The average wind speed in August is 6.5 mph. It makes August one of the most windless months of the year for Thunder Bay.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Thunder Bay in August is 8.8 hours.
Thunder Bay on the Weather Map
| Halifax |  |
+66 |
| Montreal | |
+68 |
| Niagara Falls | |
+84 |
| Ottawa | |
+70 |
| Prince Edward Island | |
+58 |
| Quebec |  |
+64 |
| Saint Andrews | |
+62 |
| Saint John | |
+68 |
| Sydney | |
+60 |
| Thunder Bay |  |
+74 |
| Toronto | |
+76 |
| Vancouver | |
+60 |
| Victoria |  |
+64 |
| Winnipeg |  |
+72 |
| Yellowknife | |
+60 |
| 1800 |  |
74°F | N 14 mph |
| 2100 | |
70°F | NE 11 mph |
| 0000 | |
68°F | NE 11 mph |
| 0300 |  |
70°F | E 12 mph |
| 0600 | |
64°F | E 11 mph |
| 0900 |  |
60°F | E 14 mph |
| 1200 |  |
66°F | E 16 mph |
| 1500 |  |
70°F | E 19 mph |