Harrisburg weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Harrisburg in August. Check more long-term weather averages for Harrisburg in August before you book your next holiday to Pennsylvania in 2025/2026.

  • 29°C maximum daytime temperature in August in Harrisburg29
    29°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in August in Harrisburg10
    10 days with some rainfall
  • 17°C minimum night-time temperature in August in Harrisburg17
    17°C min night temperature
  • 14 hours of daylight per day in August in Harrisburg14
    14 hours of daylight per day
  • Moderate heat & humidity in August in HarrisburgM
    Moderate heat & humidity
  • 85 mm monthly rainfall in August in Harrisburg85
    85 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Harrisburg8
    8 (Very High) UV index

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The August weather guide for Pennsylvania (Harrisburg) 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 Harrisburg in August?

Daytime temperatures usually reach 29°C in Harrisburg in August with moderate heat and humidity, falling to 17°C at night.

How sunny is it in Harrisburg in August?

There are normally 9 hours of bright sunshine each day in Harrisburg in August - that's 66% of daylight hours.

Does it rain in Harrisburg in August?

There are usually 10 days with some rain in Harrisburg in August and the average monthly rainfall is 85mm.

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

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

Harrisburg August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:06 19:22
Saturday, 16th August 2025 05:20 19:03
Sunday, 31st August 2025 05:34 18:40

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