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When to go · Portland, Maine

Portland, Maine in September

Great month. Inside Portland, Maine's best window: Jun–Sep for warm weather and ferries; Sep–Oct for fewer crowds.

Key facts

Verdict
Great
Temperature
22°C (72°F) / 12°C (54°F)
average high / low
Rain days
9
Crowds
Medium
United States overall
Prices
Medium
United States overall

Verdict

GreatBest and avoid months for Portland, Maine

Inside Portland, Maine's best window: Jun–Sep for warm weather and ferries; Sep–Oct for fewer crowds.

Is another month better than September?

No other month rates higher than September for Portland, Maine in this guide.

Weather in September

Long-term averages
  • Portland, MaineHighs around 22 °C (72 °F), lows around 12 °C (54 °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 Portland, Maine, side by side.

  • Verdict

    Sep: Great

    Jun: Great

  • Daytime high

    Sep: 22 °C (72 °F)

    Jun: 23 °C (73 °F)

  • Night low

    Sep: 12 °C (54 °F)

    Jun: 13 °C (55 °F)

  • Rain days

    Sep: 9 (better)

    Jun: 11

  • Crowds

    Sep: Medium

    Jun: High

  • Prices

    Sep: Medium

    Jun: High

  • Festivals listed

    Sep: 1

    Jun: 0

September: Inside Portland, Maine's best window: Jun–Sep for warm weather and ferries; Sep–Oct for fewer crowds.

June: Inside Portland, Maine's best window: Jun–Sep for warm weather and ferries; Sep–Oct for fewer crowds.

Portland, Maine: 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 →