Strunjan Weather in September
Strunjan in September sees high daytime temperatures of 24°C (75°F) and nighttime lows of 18°C (64°F). Rainfall is fairly high this month at around 155 mm (6.1 in), so pack a rain jacket to stay dry.
Rainfall in Strunjan in September
This month experiences about 11 days of rain according to historical data, averaging 155 mm (6.1 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Strunjan in September
Expect highs of 24°C (75°F) in Strunjan in September, with nights dropping to around 18°C (64°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Strunjan in September
Expect sunny days throughout the month, with an estimated 223 hours of sunshine. This makes it a pleasant time to visit Strunjan.If you prefer enjoying temperate temperatures and rain-free days, May, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 Strunjan's climate page.
Strunjan Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
24°C (75°F)
Chance of Rain
36%
Precipitation
155 mm (6.1 in)
Rainy days
11 days
Humidity
57% *
Sunshine
223 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Strunjan typically drop from around 26°C (79°F) at the start of September to approximately 23°C (73°F) by the end. Nights are cool, 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 for Strunjan in September
Browse day-by-day weather records for Strunjan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Strunjan historical weather extremes in September
According to our 49 years of weather records for Strunjan, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Strunjan reached 35°C (95°F) (September 22, 1985).
- The lowest daytime temperature in September was 11°C (52°F), recorded on September 18, 1977.
- Nighttime temperatures dropped to 3°C (37°F) on September 29, 1977, marking the coldest September night on record.
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
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What to Wear in Strunjan 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! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Strunjan 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 Strunjan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Strunjan climate overview or explore weather in Slovenia.
