Portland weather in June 2025

Expect 23°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Portland in June. Check more long-term weather averages for Portland in June before you book your next holiday to Maine in 2025/2026.

  • 23°C maximum daytime temperature in June in Portland23
    23°C max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in June in Portland11
    11 days with some rainfall
  • 11°C minimum night-time temperature in June in Portland11
    11°C min night temperature
  • 15 hours of daylight per day in June in Portland15
    15 hours of daylight per day
  • No heat & humidity in June in Portland0
    No heat & humidity
  • 85 mm monthly rainfall in June in Portland85
    85 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in June in Portland8
    8 (Very High) UV index
  • 12°C sea temperature in June in Portland12
    12°C sea temperature

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The June weather guide for Maine (Portland) 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 Portland in June?

Daytime temperatures usually reach 23°C in Portland in June, falling to 11°C at night.

How sunny is it in Portland in June?

There are normally 9 hours of bright sunshine each day in Portland in June - that's 55% of daylight hours.

How warm is the sea around Portland in June?

The average sea temperature around Portland in June is 12°C.

Does it rain in Portland in June?

There are usually 11 days with some rain in Portland in June and the average monthly rainfall is 85mm.

Portland June sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 04:02 19:16
Sunday, 15th June 2025 03:59 19:25
Monday, 30th June 2025 04:03 19:26

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