Portland weather in July 2025

Expect 26°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Portland in July. Check more long-term weather averages for Portland in July before you book your next holiday to Maine in 2025/2026.

  • 26°C maximum daytime temperature in July in Portland26
    26°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in July in Portland10
    10 days with some rainfall
  • 15°C minimum night-time temperature in July in Portland15
    15°C min night temperature
  • 15 hours of daylight per day in July in Portland15
    15 hours of daylight per day
  • Low heat & humidity in July in PortlandL
    Low heat & humidity
  • 77 mm monthly rainfall in July in Portland77
    77 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Portland8
    8 (Very High) UV index
  • 16°C sea temperature in July in Portland16
    16°C sea temperature

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The July 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 July?

Daytime temperatures usually reach 26°C in Portland in July with low heat and humidity, falling to 15°C at night.

How sunny is it in Portland in July?

There are normally 9 hours of bright sunshine each day in Portland in July - that's 59% of daylight hours.

How warm is the sea around Portland in July?

The average sea temperature around Portland in July is 16°C.

Does it rain in Portland in July?

There are usually 10 days with some rain in Portland in July and the average monthly rainfall is 77mm.

Portland July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:04 19:26
Wednesday, 16th July 2025 04:14 19:19
Thursday, 31st July 2025 04:29 19:05

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