Monthly climate guide
Ischia weather in September
With highs near 25°C (76°F) and lows around 23°C (74°F), September feels warm in Ischia. Rainfall averages about 71 mm (some rain) and the sky 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
- There's little difference between day and night (around 1°C).
- Nights stay warm, rarely below 23°C — air-conditioning helps.
- Just 30 km apart, but Ischia runs about 2°C cooler than Naples this month.
- Only 2 months are warmer in Ischia than September.
Avg high
25°C
76°F
Avg low
23°C
74°F
Rainfall
71 mm
some rain
Humidity
72%
relative
Sky
46%
cloud · a mix of sun and cloud
Ischia weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 12°C / 54°F | 101 mm | 73% | 69% |
| February | 14°C / 56°F | 12°C / 53°F | 95 mm | 74% | 68% |
| March | 14°C / 58°F | 13°C / 55°F | 84 mm | 78% | 63% |
| April | 16°C / 61°F | 15°C / 59°F | 52 mm | 80% | 57% |
| May | 19°C / 66°F | 18°C / 64°F | 52 mm | 78% | 52% |
| June | 23°C / 73°F | 22°C / 72°F | 25 mm | 78% | 33% |
| July | 26°C / 78°F | 25°C / 77°F | 24 mm | 76% | 24% |
| August | 27°C / 80°F | 26°C / 78°F | 27 mm | 75% | 24% |
| September | 25°C / 76°F | 23°C / 74°F | 71 mm | 72% | 46% |
| October | 22°C / 71°F | 20°C / 69°F | 98 mm | 74% | 55% |
| November | 19°C / 65°F | 17°C / 63°F | 140 mm | 74% | 66% |
| December | 16°C / 60°F | 14°C / 58°F | 88 mm | 71% | 63% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Ischia?
Compare the months in the chart above to find your ideal window.
Best time to visit Ischia →Other Italy cities in September
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Ischia weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/italy/ischia/september
<a href="https://weathercompare.eu/weather/italy/ischia/september">Ischia weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/italy/ischia" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Ischia weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/italy/ischia/september">Ischia weather in September</a> – WeatherCompare</p>
Ischia in September: quick answers
Is September a good time to visit Ischia?
September is a reasonable time for Ischia: highs around 25°C and about 71 mm of rain, though not one of the three best months.
How warm is Ischia in September?
Average highs are about 25°C (76°F) and average lows about 23°C (74°F), based on 10 years of daily data.
Does it rain a lot in Ischia in September?
Ischia typically gets around 71 mm of rain in September — some rain.
Figures are long-term averages for the area around Ischia (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.