Rockland weather in September 2026

Expect daytime maximum temperatures of 21°C in Rockland, Maine in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 92 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Rockland21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in September in Rockland9
    9 days with some rainfall
  • 10°C minimum night-time temperature in September in Rockland10
    10°C min night temperature
  • 12 hours of daylight per day in September in Rockland12
    12 hours of daylight per day
  • No heat & humidity in September in Rockland0
    No heat & humidity
  • 92 mm monthly rainfall in September in Rockland92
    92 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Rockland5
    5 (Moderate) UV index
  • 13°C sea temperature in September in Rockland13
    13°C sea temperature

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The September weather guide for Maine (Rockland) 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 Rockland in September?

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

How sunny is it in Rockland in September?

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

Does it rain in Rockland in September?

There are usually 10 days with some rain in Rockland in September and the average monthly rainfall is 81mm.

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

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

Rockland September sunrise & sunset times

Browse the sunrise and sunset times for Rockland in September 2026. Select a month to view Rockland sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:00 18:12
Tuesday, 15th September 2026 05:16 17:47
Wednesday, 30th September 2026 05:33 17:19

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