Go to Bovec in Slovenia
With mountains that linger in the blue sky, an emerald-green river Bovec offers picturesque scenes that are a must see for your bucket list.
Izola Weather in September
Izola in September sees high daytime temperatures of 24°C (75°F) and nighttime lows of 17°C (63°F). Rainfall is fairly high this month at around 157 mm (6.2 in), so pack a rain jacket to stay dry.
Rainfall in Izola in September
Rain is expected on roughly 11 days, totalling around 157 mm (6.2 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Izola in September
In September, expect high temperatures in Izola, with highs of 24°C (75°F) and lows of 17°C (63°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 17°C (63°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Izola in September
The month enjoys around 223 hours of sunshine, creating mostly sunny days with good weather conditions.If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Izola.
Izola Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
24°C (75°F)
Chance of Rain
37%
Precipitation
157 mm (6.2 in)
Rainy days
11 days
Humidity
57% *
Sunshine
223 hours *
Percentage Sunshine
*
* Data from: Portorož, Slovenia (6 KM, 3 Miles).
Izola Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Izola - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Izola typically drop from around 26°C (79°F) at the start of September to approximately 22°C (72°F) by the end. Nights are pleasant, with lows typically ranging from 12°C (54°F) to 16°C (61°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 Izola in September
Browse day-by-day weather records for Izola spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Izola historical weather extremes in September
The extremes listed below come from historical weather data collected in Izola from 1976 through 2026.
- The hottest September day on record in Izola reached 35°C (95°F) (September 23, 1985).
- The coldest September day was on September 18, 1977, with a maximum of 11°C (52°F).
- Izola registered its coldest September night on September 29, 1977, with temperatures dropping to 4°C (39°F).
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
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 Izola in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Izola in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
Camping6/10
Izola 3-Day Forecast
More climate data for Izola
Temperature Rainfall Sunshine Humidity
See the full Izola climate overview or explore weather in Slovenia.
Popular in September
Where to go in September - average daytime high across popular destinations.
Piran
24°C (75°F) Portorož24°C (75°F) Maribor
21°C (70°F) Ljubljana21°C (70°F) Bled19°C (66°F) Bovec19°C (66°F) Bohinj19°C (66°F) Kranjska Gora18°C (64°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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