Otočec Weather in September
Otočec in September averages 22°C (72°F) during the day and 11°C (52°F) at night. This is the wettest month of the year.
Rainfall in Otočec in September
Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. Expect around 13 days of rain based on historical data, with 122 mm (4.8 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 Otočec in September
In September, Otočec gets high temperatures, with highs of 22°C (72°F). Nights cool to around 11°C (52°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Otočec in September
Expect a lot of sunshine this month, with about 190 hours of sun. These sunny conditions add to the overall experience.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Otočec.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Otočec's climate page.
Otočec Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
22°C (72°F)
Chance of Rain
42%
Precipitation
122 mm (4.8 in)
Rainy days
13 days
Humidity
77% *
Sunshine
190 hours *
Percentage Sunshine
54% *
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Otočec typically drop from around 23°C (73°F) at the start of September to approximately 19°C (66°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Otočec in September
Browse day-by-day weather records for Otočec spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Otočec historical weather extremes in September
Based on 33 years of weather observations (1992-2025), these are the most extreme conditions recorded in Otočec.
- The hottest September day on record in Otočec reached 32°C (90°F) (September 11, 2011).
- The lowest daytime temperature in September was 9°C (48°F), recorded on September 30, 2013.
- The lowest overnight temperature recorded in September was 0°C (32°F) (September 30, 1995).
Best Places in Slovenia in September
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in September →
perfect weather
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What to Wear in Otočec in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Otočec in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Otočec's climate page.
Temperature Rainfall Sunshine Humidity
See the full Otočec climate overview or explore weather in Slovenia.
