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Greece

Skiathos weather in December

Is it warm? No. December in Skiathos is cold: afternoons average 15°C and nights 9°C. Most days (80%) peak between 11°C and 18°C.

Cold · average high

15°C

25°C or more on almost no days; 20°C or more on almost no days.

  • Average low9°overnight
  • Sea17°average, 2022–2025
  • Rainy days11124 mm in the month
  • SkyOften cloudy56% cloud · 25% clear days

How warm it really gets

Every December afternoon from 2011–2025: 465 days. Most (80%) peaked between 11° and 18°.

Number of December days by daily high, 2011–2025.

December, year by year

The average December high in each year. The warmest, 2023, averaged 16°C; the coolest, 2016, 12°C.

Average December high by year: 2011: 14.1°C, 2012: 13.8°C, 2013: 13.5°C, 2014: 14.8°C, 2015: 14.7°C, 2016: 12.4°C, 2017: 15.3°C, 2018: 13.3°C, 2019: 15.2°C, 2020: 16.1°C, 2021: 14.4°C, 2022: 16.1°C, 2023: 16.2°C, 2024: 14.9°C, 2025: 15.6°C.

Compared with home

Average December highs. Expect rain on about 11 days (124 mm in a typical month).

  • Skiathos15°
  • Cork10°
  • London10°
  • Dublin9°
  • Belfast9°
  • Manchester9°
  • Glasgow8°

Other months

Skiathos all year · Where else is hot in December

Warmer in December, not much further

Flying times are estimates from Dublin; Skiathos is about 3h 45m.

  • Cool in Dec

    19°C average high

    avg high · 8° at night

    25°C+ on rarely

    Alicante & Costa Blanca

    Spain

    Sea
    16°
    Rain
    2 days
    Sky
    Some cloud
    From Dublin
    ≈ 2h 30m

  • Cool in Dec

    18°C average high

    avg high · 9° at night

    25°C+ on rarely

    Valencia

    Spain

    Sea
    16°
    Rain
    3 days
    Sky
    Some cloud
    From Dublin
    ≈ 2h 30m

  • Cool in Dec

    18°C average high

    avg high · 11° at night

    25°C+ on rarely

    Mallorca

    Balearic Islands, Spain

    Sea
    17°
    Rain
    5 days
    Sky
    Often cloudy
    From Dublin
    ≈ 2h 30m

Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Skiathos airport. Sea: Copernicus ERA5, 2022–2025. Rainy days = days with 1 mm of rain or more, as weather stations count them. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology