Skip to content
Voykit
Draft data. Times, fares and step counts are desk estimates awaiting field checks. How we verify
Source checked
A source and a date are on record: we read it from an official or published page. Not yet confirmed on the ground.
Field checked
Someone checked it on the ground, with the date shown.
Plan calculated
Worked out by Voykit from its own data (times, distances, budgets). A calculation, not a measurement.

Unknown times stay unknown. How we verify

When to go · Southwest Harbor

Southwest Harbor in September

Good month. Outside the best window (Jun–Aug). Across United States: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.

Key facts

Verdict
Good
Temperature
21°C (70°F) / 9°C (48°F)
average high / low
Rain days
9
Crowds
Medium
United States overall
Prices
Medium
United States overall

Verdict

GoodUnited States month rating

Outside the best window (Jun–Aug). Across United States: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.

Is another month better than September?

September is rated good. These months rate higher:

Weather in September

Long-term averages
  • Southwest HarborHighs around 21 °C (70 °F), lows around 9 °C (48 °F), rain on about 9 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Labor Day big impact

    1st Monday of September · United States

    End of summer; last big road-trip weekend.

Crowds and prices

Crowds · United States overall
Medium
Prices · United States overall
Medium

United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.

Compare two months

Weather, crowds and prices for any two months in Southwest Harbor, side by side.

  • Verdict

    Sep: Good

    Jun: Great (better)

  • Daytime high

    Sep: 21 °C (70 °F)

    Jun: 23 °C (73 °F)

  • Night low

    Sep: 9 °C (48 °F)

    Jun: 11 °C (52 °F)

  • Rain days

    Sep: 9

    Jun: 7 (better)

  • Crowds

    Sep: Medium

    Jun: High

  • Prices

    Sep: Medium

    Jun: High

  • Festivals listed

    Sep: 1

    Jun: 0

September: Outside the best window (Jun–Aug). Across United States: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.

June: Inside Southwest Harbor's best window: Jun–Aug.

Southwest Harbor: figures are long-term averages from this guide, not a forecast.

What to pack

  • A warm layer for the evenings

Build the full packing list for your trip →

Across United States in September →