Croatia (Istria) · September
Best travel monthTravel seasonCroatia · Europe
Max Temp · September
25°
at night 16° · avg 20°★ Best travel time
- Sunshine
- 6 h/day
- Rain Days
- 6 days
- Water Temp
- 22°
average
108 mm · changeable
pleasantly warm
In Croatia (Istria), September is 5°C cooler than the warmest month (July).
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MAXMAX | 10° | 11° | 14° | 18° | 22° | 27° | 30° | 30° | 25° | 20° | 15° | 12° |
MINMIN | 2° | 3° | 5° | 8° | 12° | 17° | 19° | 19° | 16° | 12° | 8° | 4° |
☀️Sunshine | 3h | 4h | 6h | 7h | 7h | 9h | 9h | 8h | 6h | 5h | 3h | 3h |
🌊Water Temp | 13° | 12° | 12° | 14° | 18° | 22° | 24° | 25° | 22° | 20° | 17° | 15° |
🌧Rain Days | 6d73mm | 7d82mm | 6d67mm | 6d57mm | 7d81mm | 4d51mm | 3d39mm | 5d67mm | 6d108mm | 6d80mm | 8d144mm | 7d108mm |
Best travel time current monthMonthly averages 2005–2025 · Source: ERA5 + station data
Travel season — mid-range prices, good availability.
September is one of the best travel months for Croatia (Istria) — conditions are stable, temperatures reach 24°C, and outdoor activities are excellent.
Daytime temperatures reach up to 24°C, cooling to 15°C at night (daily average: 20°C). With 6 sunshine hours per day and 6 rain days (108 mm), this is one of the cloudier months. Sea temperature is 22°C — pleasantly warm for long swim sessions.
Pack light summer clothing, sunscreen, and swimwear — beach and water conditions in September are ideal.
Packing list for Croatia (Istria) in September
- T-Shirts und kurze Hosen
- Leichte Jacke für kühle Abende
- Badezeug (Wasser ist noch etwas frisch)
- Sonnencreme
- Sonnenbrille
- Kleiner Regenschirm (vereinzelte Schauer möglich)
- Reiseapotheke
Frequently Asked Questions
- Is September a good time to visit Croatia (Istria)?
- Yes — September is one of the best months to visit Croatia (Istria) (Climate Score: 61/100). Pleasant temperatures (24°C), good sunshine (6 h/day), and few rain days (6) make it one of the most recommended months.
- How warm is it in Croatia (Istria) in September?
- In September, Croatia (Istria) sees daily highs of 24°C. Nights cool to 15°C, with a daily average of 20°C.
- How much rain falls in Croatia (Istria) in September?
- In September, Croatia (Istria) receives an average of 108 mm of rain over 6 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Croatia (Istria) get in September?
- Croatia (Istria) averages 6 sunshine hours per day in September — close to the annual average.
- How warm is the water in Croatia (Istria) in September?
- Water temperature in Croatia (Istria) in September averages 22°C — pleasantly warm for swim sessions.
