Portland weather in January 2025

Expect 32°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Portland in January. Check more long-term weather averages for Portland in January before you book your next holiday to Maine in 2025/2026.

  • 32°F maximum daytime temperature in January in Portland32
    32°F max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in January in Portland11
    11 days with some rainfall
  • 12°F minimum night-time temperature in January in Portland12
    12°F min night temperature
  • 9 hours of daylight per day in January in Portland9
    9 hours of daylight per day
  • No heat & humidity in January in Portland0
    No heat & humidity
  • 3.7 inches monthly rainfall in January in Portland3.7
    3.7 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Portland1
    1 (Low) UV index
  • 41°F sea temperature in January in Portland41
    41°F sea temperature

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The January 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)  |  Imperial (°F)

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More about the USA

How cold is it in Portland in January?

Daytime temperatures usually reach 32°F in Portland in January, falling to 12°F at night.

How sunny is it in Portland in January?

There are normally 5 hours of bright sunshine each day in Portland in January - that's 55% of daylight hours.

How warm is the sea around Portland in January?

The average sea temperature around Portland in January is 41°F.

Does it rain in Portland in January?

There are usually 11 days with some rain in Portland in January and the average monthly rainfall is 3.7 inches. Rain may fall as snow in this month.

Portland January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 07:15 16:15
Thursday, 16th January 2025 07:11 16:31
Friday, 31st January 2025 06:58 16:51

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