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Kefalonia weather in January

Is it warm? No. January in Kefalonia is cool: afternoons average 15°C and nights 9°C. Most days (80%) peak between 12°C and 18°C.

Cool · average high

15°C

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

  • Average low9°overnight
  • Sea16°average, 2022–2025
  • Rainy days12150 mm in the month
  • SkyOften cloudy52% cloud · 25% clear days

How warm it really gets

Every January afternoon from 2011–2025: 465 days. Most (80%) peaked between 12° and 18°.

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

January, year by year

The average January high in each year. The warmest, 2025, averaged 17°C; the coolest, 2017, 13°C.

Average January high by year: 2011: 15.2°C, 2012: 13°C, 2013: 15.2°C, 2014: 16.5°C, 2015: 15.3°C, 2016: 15.6°C, 2017: 12.9°C, 2018: 15.8°C, 2019: 13.7°C, 2020: 15.3°C, 2021: 16.5°C, 2022: 14.6°C, 2023: 16.3°C, 2024: 16.1°C, 2025: 17.2°C.

Compared with home

Average January highs. Expect rain on about 12 days (150 mm in a typical month).

  • Kefalonia15°
  • Cork9°
  • London9°
  • Dublin8°
  • Belfast8°
  • Glasgow7°
  • Manchester7°

Other months

Kefalonia all year · Where else is hot in January

Warmer in January, not much further

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

  • Cool in Jan

    18°C average high

    avg high · 7° at night

    25°C+ on rarely

    Alicante & Costa Blanca

    Spain

    Sea
    14°
    Rain
    2 days
    Sky
    Some cloud
    From Dublin
    ≈ 2h 30m

  • Cool in Jan

    18°C average high

    avg high · 8° at night

    25°C+ on rarely

    Valencia

    Spain

    Sea
    15°
    Rain
    3 days
    Sky
    Some cloud
    From Dublin
    ≈ 2h 30m

  • Cool in Jan

    17°C average high

    avg high · 9° at night

    25°C+ on rarely

    Mallorca

    Balearic Islands, Spain

    Sea
    16°
    Rain
    5 days
    Sky
    Often cloudy
    From Dublin
    ≈ 2h 30m

Air: Copernicus ERA5-Land, 2011–2025, matched to the official averages for Kefalonia 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