Portland weather in January 2026

Expect 0°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Portland in January based on long-term weather averages. There is usually 11 days with some rainfall and 94 mm of average monthly rainfall in January.

  • 0°C maximum daytime temperature in January in Portland0
    0°C max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in January in Portland11
    11 days with some rainfall
  • -11°C minimum night-time temperature in January in Portland-11
    -11°C 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
  • 94 mm monthly rainfall in January in Portland94
    94 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Portland1
    1 (Low) UV index
  • 5°C sea temperature in January in Portland5
    5°C 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 / mm)  |  Imperial (°F / inches)

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How cold is it in Portland in January?

Daytime temperatures usually reach -0°C in Portland in January, falling to -11°C 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.

Is the sea cold around Portland in January?

The average sea temperature around Portland in January is 5°C.

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 94mm. Rain may fall as snow in this month.

Portland January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:15 16:15
Friday, 16th January 2026 07:11 16:31
Saturday, 31st January 2026 06:59 16:51

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