Ithaca weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Ithaca in September. Check more long-term weather averages for Ithaca in September before you book your next holiday to New York in 2025/2026.

  • 21°C maximum daytime temperature in September in Ithaca21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in September in Ithaca11
    11 days with some rainfall
  • 9°C minimum night-time temperature in September in Ithaca9
    9°C min night temperature
  • 12 hours of daylight per day in September in Ithaca12
    12 hours of daylight per day
  • No heat & humidity in September in Ithaca0
    No heat & humidity
  • 87 mm monthly rainfall in September in Ithaca87
    87 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Ithaca6
    6 (High) UV index

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The September weather guide for New York (Ithaca) 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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More about New York

How hot is it in Ithaca in September?

Daytime temperatures usually reach 21°C in Ithaca in September, falling to 9°C at night.

How sunny is it in Ithaca in September?

There are normally 7 hours of bright sunshine each day in Ithaca in September - that's 54% of daylight hours.

Does it rain in Ithaca in September?

There are usually 11 days with some rain in Ithaca in September and the average monthly rainfall is 87mm.

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

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

Ithaca September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:31 18:40
Monday, 15th September 2025 05:46 18:15
Tuesday, 30th September 2025 06:02 17:49

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