When to go · Thunder Bay
Thunder Bay, month by month
The best months for Thunder Bay: Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Mar, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-8 °C (18 °F) / -19 °C (−2 °F), 8 rain days18 °F (-8 °C) / −2 °F (-19 °C), 8 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-5 °C (23 °F) / -18 °C (0 °F), 7 rain days23 °F (-5 °C) / 0 °F (-18 °C), 7 rain daysCrowds: Low
- MarchAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).1 °C (34 °F) / -12 °C (10 °F), 8 rain days34 °F (1 °C) / 10 °F (-12 °C), 8 rain daysCrowds: Low
- AprilMixedOutside the best window (Jun–Sep). Across Canada: Thaw and mud; Rockies trails still snowy; Vancouver cherry blossoms.9 °C (48 °F) / -4 °C (25 °F), 8 rain days48 °F (9 °C) / 25 °F (-4 °C), 8 rain daysCrowds: Low
- MayGoodOutside the best window (Jun–Sep). Across Canada: Victoria Day weekend opens the season; Rockies lakes still frozen at altitude.16 °C (61 °F) / 2 °C (36 °F), 10 rain days61 °F (16 °C) / 36 °F (2 °C), 10 rain daysCrowds: Medium
- JuneGreatInside Thunder Bay's best window: Jun–Sep.22 °C (72 °F) / 8 °C (46 °F), 11 rain days72 °F (22 °C) / 46 °F (8 °C), 11 rain daysCrowds: Medium · 1 festival or holiday
- JulyGreatInside Thunder Bay's best window: Jun–Sep.25 °C (77 °F) / 11 °C (52 °F), 11 rain days77 °F (25 °C) / 52 °F (11 °C), 11 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Thunder Bay's best window: Jun–Sep.24 °C (75 °F) / 10 °C (50 °F), 11 rain days75 °F (24 °C) / 50 °F (10 °C), 11 rain daysCrowds: High
- SeptemberGreatInside Thunder Bay's best window: Jun–Sep.19 °C (66 °F) / 6 °C (43 °F), 11 rain days66 °F (19 °C) / 43 °F (6 °C), 11 rain daysCrowds: Medium
- OctoberGoodOutside the best window (Jun–Sep). Across Canada: Foliage in Ontario, Québec and the Maritimes early in the month; mountain roads get snow.11 °C (52 °F) / 0 °C (32 °F), 10 rain days52 °F (11 °C) / 32 °F (0 °C), 10 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).3 °C (37 °F) / -7 °C (19 °F), 10 rain days37 °F (3 °C) / 19 °F (-7 °C), 10 rain daysCrowds: Low
- DecemberAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-5 °C (23 °F) / -15 °C (5 °F), 9 rain days23 °F (-5 °C) / 5 °F (-15 °C), 9 rain daysCrowds: Medium · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Thunder Bay, side by side.
Verdict
Jun: Great
Jul: Great
Daytime high
Jun: 22 °C (72 °F)72 °F (22 °C)
Jul: 25 °C (77 °F)77 °F (25 °C)
Night low
Jun: 8 °C (46 °F)46 °F (8 °C)
Jul: 11 °C (52 °F)52 °F (11 °C)
Rain days
Jun: 11
Jul: 11
Crowds
Jun: Medium
Jul: High
Prices
Jun: Medium
Jul: High
Festivals listed
Jun: 1
Jul: 1
June: Inside Thunder Bay's best window: Jun–Sep.
July: Inside Thunder Bay's best window: Jun–Sep.
Thunder Bay: figures are long-term averages from this guide, not a forecast.