When to go · Thunder Bay
Thunder Bay in September
Great month. Inside Thunder Bay's best window: Jun–Sep.
Key facts
- Verdict
- Great
- Temperature
- 19°C (66°F)66°F (19°C) / 6°C (43°F)43°F (6°C)
- average high / low
- Rain days
- 11
- Crowds
- Medium
- Canada overall
- Prices
- Medium
- Canada overall
Verdict
Inside Thunder Bay's best window: Jun–Sep.
Is another month better than September?
No other month rates higher than September for Thunder Bay in this guide.
Weather in September
- Thunder BayHighs around 19 °C (66 °F), lows around 6 °C (43 °F), rain on about 11 daysHighs around 66 °F (19 °C), lows around 43 °F (6 °C), rain on about 11 days
Crowds and prices
- Crowds · Canada overall
- Medium
- Prices · Canada overall
- Medium
Canada overall: After Labour Day crowds drop; larches turn gold in the Rockies late in the month.
Compare two months
Weather, crowds and prices for any two months in Thunder Bay, side by side.
Verdict
Sep: Great
Jun: Great
Daytime high
Sep: 19 °C (66 °F)66 °F (19 °C)
Jun: 22 °C (72 °F)72 °F (22 °C)
Night low
Sep: 6 °C (43 °F)43 °F (6 °C)
Jun: 8 °C (46 °F)46 °F (8 °C)
Rain days
Sep: 11
Jun: 11
Crowds
Sep: Medium
Jun: Medium
Prices
Sep: Medium
Jun: Medium
Festivals listed
Sep: 0
Jun: 1
September: Inside Thunder Bay's best window: Jun–Sep.
June: Inside Thunder Bay's best window: Jun–Sep.
Thunder Bay: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast