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Italy

Sardinia (Cagliari) weather in September

Is it warm? Yes. September in Sardinia (Cagliari) is warm: afternoons average 28°C and nights 20°C. Most days (80%) peak between 24°C and 31°C.

Warm · average high

28°C

25°C or more on about eight in ten days; 20°C or more on almost every day.

  • Average low20°overnight
  • Sea26°average, 2023–2025
  • Rainy days430 mm in the month
  • SkySome cloud37% cloud · 48% clear days

How warm it really gets

Every September afternoon from 2011–2025: 450 days. Most (80%) peaked between 24° and 31°.

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

September, year by year

The average September high in each year. The warmest, 2023, averaged 29°C; the coolest, 2013, 26°C.

Average September high by year: 2011: 28°C, 2012: 27.2°C, 2013: 26.2°C, 2014: 28.8°C, 2015: 27.5°C, 2016: 27.2°C, 2017: 26.3°C, 2018: 27.4°C, 2019: 28.3°C, 2020: 26.7°C, 2021: 28.4°C, 2022: 28.9°C, 2023: 29.1°C, 2024: 26.8°C, 2025: 27.8°C.

Compared with home

Average September highs. Expect rain on about 4 days (30 mm in a typical month).

  • Sardinia (Cagliari)28°
  • London19°
  • Manchester17°
  • Dublin17°
  • Cork17°
  • Belfast16°
  • Glasgow16°

Other months

Sardinia (Cagliari) all year · Where else is hot in September

Warmer in September, not much further

Flying times are estimates from Dublin; Sardinia (Cagliari) is about 3h.

  • Hot in Sep

    31°C average high

    avg high · 19° at night

    25°C+ on almost every day

    Seville

    Spain

    Sea
    Inland
    Rain
    3 days
    Sky
    Some cloud
    From Dublin
    ≈ 2h 45m

  • Hot in Sep

    29°C average high

    avg high · 22° at night

    25°C+ on almost every day

    Hammamet

    Tunisia

    Sea
    27°
    Rain
    3 days
    Sky
    Some cloud
    From Dublin
    ≈ 3h 15m

  • Hot in Sep

    33°C average high

    avg high · 18° at night

    25°C+ on almost every day · often 35°C+

    Marrakech

    Morocco

    Sea
    Inland
    Rain
    1 day
    Sky
    Some cloud
    From Dublin
    ≈ 3h 30m

Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology