Monthly climate guide
Cagliari weather in September
September in Cagliari is typically warm, with average daytime highs around 26°C (78°F) and night-time lows near 22°C (72°F). The month usually brings about 39 mm of rain (fairly dry) and is a mix of sun and cloud. Daytime highs are 2°C cooler than August and 3°C warmer than October.
What stands out in September
- Even after dark it stays around 22°C, so sleeping can feel warm.
- It's humid — around 72% — so the heat feels heavier.
- September is Cagliari's third warmest month.
- Days and nights are close, only about 4°C apart.
Avg high
26°C
78°F
Avg low
22°C
72°F
Rainfall
39 mm
fairly dry
Humidity
72%
relative
Sky
40%
cloud · a mix of sun and cloud
Cagliari weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 11°C / 52°F | 45 mm | 77% | 58% |
| February | 14°C / 57°F | 11°C / 51°F | 54 mm | 77% | 56% |
| March | 15°C / 59°F | 12°C / 53°F | 62 mm | 79% | 57% |
| April | 17°C / 63°F | 14°C / 56°F | 35 mm | 79% | 53% |
| May | 20°C / 68°F | 16°C / 61°F | 43 mm | 76% | 47% |
| June | 24°C / 76°F | 20°C / 69°F | 10 mm | 73% | 28% |
| July | 27°C / 81°F | 23°C / 74°F | 4 mm | 70% | 17% |
| August | 28°C / 83°F | 24°C / 76°F | 16 mm | 68% | 19% |
| September | 26°C / 78°F | 22°C / 72°F | 39 mm | 72% | 40% |
| October | 23°C / 73°F | 19°C / 67°F | 57 mm | 76% | 46% |
| November | 19°C / 65°F | 16°C / 60°F | 99 mm | 78% | 60% |
| December | 16°C / 60°F | 13°C / 55°F | 62 mm | 77% | 51% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
Is September a good time to visit Cagliari?
Compare the months in the chart above to find your ideal window.
Best time to visit Cagliari →Other Italy cities in September
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Cagliari weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/italy/cagliari/september
<a href="https://weathercompare.eu/weather/italy/cagliari/september">Cagliari weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/italy/cagliari" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Cagliari weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/italy/cagliari/september">Cagliari weather in September</a> – WeatherCompare</p>
Cagliari in September: quick answers
Is September a good time to visit Cagliari?
September is a reasonable time for Cagliari: highs around 26°C and about 39 mm of rain, though not one of the three best months.
How warm is Cagliari in September?
Average highs are about 26°C (78°F) and average lows about 22°C (72°F), based on 10 years of daily data.
Does it rain a lot in Cagliari in September?
Cagliari typically gets around 39 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Cagliari (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.