Cascais weather in January 2026

Expect 14°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Cascais in January based on long-term weather averages. There is usually 15 days with some rainfall and 123 mm of average monthly rainfall in January.

  • 14°C maximum daytime temperature in January in Cascais14
    14°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in January in Cascais15
    15 days with some rainfall
  • 8°C minimum night-time temperature in January in Cascais8
    8°C min night temperature
  • 10 hours of daylight per day in January in Cascais10
    10 hours of daylight per day
  • No heat & humidity in January in Cascais0
    No heat & humidity
  • 123 mm monthly rainfall in January in Cascais123
    123 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in January in Cascais2
    2 (Low) UV index
  • 15°C sea temperature in January in Cascais15
    15°C sea temperature

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The January weather guide for Portugal (Cascais) 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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More about Portugal

How warm is it in Cascais in January?

Daytime temperatures usually reach 14°C in Cascais in January, falling to 8°C at night.

How sunny is it in Cascais in January?

There are normally 5 hours of bright sunshine each day in Cascais in January - that's 48% of daylight hours.

How warm is the sea around Cascais in January?

The average sea temperature around Cascais in January is 15°C.

Does it rain in Cascais in January?

There are usually 15 days with some rain in Cascais in January and the average monthly rainfall is 123mm.

Cascais January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:56 17:27
Friday, 16th January 2026 07:54 17:41
Saturday, 31st January 2026 07:44 17:58

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