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Ischia Weather in September
Ischia in September sees high daytime temperatures of 25°C (77°F) and nighttime lows of 22°C (72°F). Rainfall is fairly high this month at around 83 mm (3.3 in), so pack a rain jacket to stay dry.
Rainfall in Ischia in September
Expect around 9 days of rain based on historical data, with 83 mm (3.3 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Ischia in September
September is a excellent month in Ischia, with 25°C (77°F) during the day and 22°C (72°F) at night. This month falls in the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.
Sunshine in Ischia in September
There are approximately 234 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in September
With water at 25°C (77°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Ischia.
Ischia Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
25°C (77°F)
Water Temperature
25°C (77°F)
Chance of Rain
29%
Precipitation
83 mm (3.3 in)
Rainy days
9 days
Sunshine
234 hours
Percentage Sunshine
Ischia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ischia - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ischia typically drop from around 28°C (82°F) at the start of September to approximately 25°C (77°F) by the end. Nights are pleasant, with lows typically ranging from 15°C (59°F) to 19°C (66°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Ischia in September
Browse day-by-day weather records for Ischia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ischia historical weather extremes in September
Based on weather observations in Ischia between 1976 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Ischia reached 37°C (99°F) (September 4, 1982).
- Ischia experienced its chilliest September day on September 28, 2020, reaching only 17°C (63°F).
- Ischia registered its coldest September night on September 26, 1984, with temperatures dropping to 9°C (48°F).
Best Places in Italy in September
Find out more about the weather in Italy and which places have the best travel conditions in this month. See all of Italy in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Ischia in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 25°C (77°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Ischia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping8/10 -
Outdoor sports7/10
Ischia 3-Day Forecast
More climate data for Ischia
Temperature Rainfall Sunshine Water Temp
See the full Ischia climate overview or explore weather in Italy.
Popular in September
Where to go in September - average daytime high across popular destinations.
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