Lancaster weather in September 2025

Expect 25°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Lancaster in September. Check more long-term weather averages for Lancaster in September before you book your next holiday to Pennsylvania in 2025/2026.

  • 25°C maximum daytime temperature in September in Lancaster25
    25°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Lancaster8
    8 days with some rainfall
  • 12°C minimum night-time temperature in September in Lancaster12
    12°C min night temperature
  • 12 hours of daylight per day in September in Lancaster12
    12 hours of daylight per day
  • No heat & humidity in September in Lancaster0
    No heat & humidity
  • 97 mm monthly rainfall in September in Lancaster97
    97 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Lancaster6
    6 (High) UV index

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The September weather guide for Pennsylvania (Lancaster) 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 Lancaster in September?

Daytime temperatures usually reach 25°C in Lancaster in September with no heat and humidity, falling to 12°C at night.

How sunny is it in Lancaster in September?

There are normally 7 hours of bright sunshine each day in Lancaster in September - that's 59% of daylight hours.

Does it rain in Lancaster in September?

There are usually 8 days with some rain in Lancaster in September and the average monthly rainfall is 97mm.

What is the chance of a hurricane in Lancaster in September?

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

Lancaster September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:33 18:36
Monday, 15th September 2025 05:46 18:13
Tuesday, 30th September 2025 06:01 17:49

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