Allentown weather in August 2025

Expect daytime maximum temperatures of 28°C in Allentown in August based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 110 mm of rainfall in the month.

  • 28°C maximum daytime temperature in August in Allentown28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in August in Allentown10
    10 days with some rainfall
  • 16°C minimum night-time temperature in August in Allentown16
    16°C min night temperature
  • 14 hours of daylight per day in August in Allentown14
    14 hours of daylight per day
  • Moderate heat & humidity in August in AllentownM
    Moderate heat & humidity
  • 110 mm monthly rainfall in August in Allentown110
    110 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Allentown8
    8 (Very High) UV index

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The August weather guide for Pennsylvania (Allentown) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Allentown in August?

Daytime temperatures usually reach 28°C in Allentown in August with moderate heat and humidity, falling to 16°C at night.

How sunny is it in Allentown in August?

There are normally 8 hours of bright sunshine each day in Allentown in August - that's 61% of daylight hours.

Does it rain in Allentown in August?

There are usually 10 days with some rain in Allentown in August and the average monthly rainfall is 110mm.

What is the chance of a hurricane in Allentown in August?

On average less than 1 day in August in Allentown is likely to be affected by the passage of one or more tropical storms.

Allentown August sunrise & sunset times

Browse the sunrise and sunset times for Allentown in August 2025. Select a month to view Allentown sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:59 19:17
Saturday, 16th August 2025 05:14 18:58
Sunday, 31st August 2025 05:28 18:35

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