Thunder Bay
September
Weather in Thunder Bay for September 2024
Your guide to Thunder Bay weather in September - trends and predictions
Until now, September 2024 in Thunder Bay is slightly cooler than the historical average by -0.7 °C.
Expect cooler weather in the next days in Thunder Bay with the forecast suggesting a temperature of 18 °C, lower than the historical average.
In general, the average temperature in Thunder Bay at the beginning of September is 22.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.4 °C by the end of September.
Thunder Bay sees moderate rainfall in September, averaging 8 rainy days.
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22
Dry days
8
Rainy days
0
Snow days
19°/10°
Temperatures
15 km/h
Avg max wind
80 %
Avg humidity
Thunder Bay in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | ||||||
| 2  26° | 3  27° | 4 24° | 5  24° | 6 17° | 7 19° | 8 20° |
| 9  18° | 10 20° | 11  19° | 12 18° | 13 21° | 14 19° | 15 22° |
| 16 21° | 17 25° | 18 27° | 19 22° | 20 23° | 21 21° | 22 19° |
| 23 14° | 24 16° | 25 17° | 26 16° | 27 17° | 28  10° | 29 15° |
| 30 10° |
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Temperatures trend during September in Thunder Bay
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy rain possible | 22° /10° | 0.1 mm | 6 | |
| 2 Sept. | Sunny | 26° /12° | 0 mm | 7 | |
| 3 Sept. | Partly cloudy | 27° /14° | 0.2 mm | 7 | |
| 4 Sept. | Partly cloudy | 24° /15° | 0 mm | 6 | |
| 5 Sept. | Fog | 24° /12° | 6.2 mm | 6 | |
| 6 Sept. | Light rain shower | 17° /7° | 16.5 mm | 4 | |
| 7 Sept. | Partly cloudy | 19° /5° | 0 mm | 6 | |
| 8 Sept. | Mist | 20° /5° | 0 mm | 5 | |
| 9 Sept. | Light drizzle | 18° /10° | 5.9 mm | 5 | |
| 10 Sept. | Light rain shower | 20° /11° | 1.5 mm | 5 | |
| 11 Sept. | Overcast | 19° /11° | 0 mm | 5 | |
| 12 Sept. | Overcast | 18° /9° | 0 mm | 5 | |
| 13 Sept. | Sunny | 21° /9° | 0 mm | 6 | |
| 14 Sept. | Mist | 19° /8° | 0 mm | 5 | |
| 15 Sept. | Mist | 22° /13° | 0.9 mm | 5 | |
| 16 Sept. | Mist | 21° /13° | 3.7 mm | 5 | |
| 17 Sept. | Partly cloudy | 25° /15° | 0 mm | 5 | |
| 18 Sept. | Fog | 27° /14° | 0 mm | 3 | |
| 19 Sept. | Partly cloudy | 22° /11° | 0 mm | 4 | |
| 20 Sept. | Mist | 23° /15° | 0 mm | 4 | |
| 21 Sept. | Sunny | 21° /14° | 0.1 mm | 5 | |
| 22 Sept. | Sunny | 19° /12° | 0 mm | 5 | |
| 23 Sept. | Patchy rain possible | 14° /11° | 0.9 mm | 3 | |
| 24 Sept. | Overcast | 16° /10° | 0 mm | 3 | |
| 25 Sept. | Patchy rain possible | 17° /10° | 0.9 mm | 3 | |
| 26 Sept. | Sunny | 16° /9° | 0 mm | 4 | |
| 27 Sept. | Patchy rain possible | 17° /8° | 3.5 mm | 3 | |
| 28 Sept. | Cloudy | 10° /7° | 0.1 mm | 2 | |
| 29 Sept. | Patchy rain possible | 15° /5° | 1.2 mm | 2 | |
| 30 Sept. | Patchy rain possible | 10° /5° | 0.3 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Thunder Bay in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Thunder Bay forecast closer to your planned date for the most up-to-date weather information.
Thunder Bay in September - FAQ
What are the expected maximum and minimum temperatures in Thunder Bay during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Thunder Bay during September?
Moderate rainfall is anticipated in Thunder Bay during September, with a total of 70.9 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Thunder Bay during September?
The average wind speed in Thunder Bay during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
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