Boston in September

Inside Boston's best window: May–Jun, Sep–Oct.

No other month rates higher than September for Boston in this guide.

• BostonHighs around 73 °C (163 °F), lows around 58 °C (136 °F), rain on about 9 daysHighs around 163 °F (73 °C), lows around 136 °F (58 °C), rain on about 9 days
• Northeast, United States · New York, Boston, Washington, Philadelphia, Mainebest weather

  Cold, sometimes snowy winters; humid 30 °C (86 °F)+ spells in July–August; late September to October is the pick for foliage and walking.Cold, sometimes snowy winters; humid 86 °F (30 °C)+ spells in July–August; late September to October is the pick for foliage and walking.

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 · 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.

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

• Light, breathable clothes, a sun hat and sunscreen

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