When to go · Allentown
Allentown in September
Great month. Inside Allentown's best window: May–Jun, Sep–Oct.
Key facts
- Verdict
- Great
- Temperature
- 25°C (77°F)77°F (25°C) / 13°C (55°F)55°F (13°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Allentown's best window: May–Jun, Sep–Oct.
Is another month better than September?
No other month rates higher than September for Allentown in this guide.
Weather in September
- AllentownHighs around 25 °C (77 °F), lows around 13 °C (55 °F), rain on about 9 daysHighs around 77 °F (25 °C), lows around 55 °F (13 °C), 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 Allentown, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 25 °C (77 °F)77 °F (25 °C)
May: 23 °C (73 °F)73 °F (23 °C)
Night low
Sep: 13 °C (55 °F)55 °F (13 °C)
May: 10 °C (50 °F)50 °F (10 °C)
Rain days
Sep: 9 (better)
May: 11
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 1
May: 1
September: Inside Allentown's best window: May–Jun, Sep–Oct.
May: Inside Allentown's best window: May–Jun, Sep–Oct.
Allentown: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.