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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

  1. JanuaryAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-8 °C (18 °F) / -19 °C (−2 °F), 8 rain daysCrowds: Low
  2. FebruaryAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-5 °C (23 °F) / -18 °C (0 °F), 7 rain daysCrowds: Low
  3. MarchAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).1 °C (34 °F) / -12 °C (10 °F), 8 rain daysCrowds: Low
  4. 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 daysCrowds: Low
  5. 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 daysCrowds: Medium
  6. JuneGreatInside Thunder Bay's best window: Jun–Sep.22 °C (72 °F) / 8 °C (46 °F), 11 rain daysCrowds: Medium · 1 festival or holiday
  7. JulyGreatInside Thunder Bay's best window: Jun–Sep.25 °C (77 °F) / 11 °C (52 °F), 11 rain daysCrowds: High · 1 festival or holiday
  8. AugustGreatInside Thunder Bay's best window: Jun–Sep.24 °C (75 °F) / 10 °C (50 °F), 11 rain daysCrowds: High
  9. SeptemberGreatInside Thunder Bay's best window: Jun–Sep.19 °C (66 °F) / 6 °C (43 °F), 11 rain daysCrowds: Medium
  10. 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 daysCrowds: Medium
  11. NovemberAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).3 °C (37 °F) / -7 °C (19 °F), 10 rain daysCrowds: Low
  12. DecemberAvoidListed as a month to avoid: Nov–Mar (cold, snow, some parks closed).-5 °C (23 °F) / -15 °C (5 °F), 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)

    Jul: 25 °C (77 °F)

  • Night low

    Jun: 8 °C (46 °F)

    Jul: 11 °C (52 °F)

  • 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.