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Istria (Pula)
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Weather in Istria for September 2025

Your guide to Istria weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Yellow Wind Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Istria is slightly cooler than the historical average by -1.4 °C.

  • Expect cooler weather in the next days in Istria with the forecast suggesting a temperature of 21.5 °C, lower than the historical average.

  • In general, the average temperature in Istria at the beginning of September is 26.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.

    • Rain 🌧️

  • The climate of Istria in September is notably wet, with an average of 15 rainy days, and a total of 88.7 mm of precipitation.

    • More

  • Is September a good time to visit Istria? check out the best time to travel to Istria page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/19°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
66 %
Avg humidity

Istria Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
27°
2
Sunny
27°
3
Overcast
26°
4
Sunny
26°
5
Sunny
26°
6
Patchy rain possible
25°
7
Sunny
26°
8
Sunny
26°
9
Sunny
25°
10
Sunny
25°
11
Sunny
25°
12
Overcast
24°
13
Partly cloudy
22°
14
Partly cloudy
22°
15
Sunny
22°
16
Weather Alert Moderate rain
24°
17
Weather Alert Patchy rain possible
22°
18
Sunny
24°
19
Sunny
26°
20
Sunny
26°
21
Sunny
24°
22
Sunny
24°
23
Patchy rain possible
23°
24
Moderate rain
21°
25
Patchy rain possible
16°
26
Patchy rain possible
18°
27
Patchy rain possible
18°
28
Patchy rain possible
17°
29
Patchy rain possible
18°
30
Sunny
22°

What’s the Weather Like in Istria This September?

Discover the average temperatures and weather trends across Istria’s cities this September.
SunnyPula23 °C / 19 °CPatchy rain possiblePoreč24 °C / 18 °CPatchy rain possibleRovinj24 °C / 18 °CMore Locations

Temperatures trend during September in Istria

See the weather trend as well as the moving average line

September weather in Istria day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 27° /21° 0.7 mm 6
2 Sept. Sunny
Sunny
 27° /21° 2.5 mm 7
3 Sept. Overcast
Overcast
 26° /20° 0.6 mm 6
4 Sept. Sunny
Sunny
 26° /20° 0 mm 7
5 Sept. Sunny
Sunny
 26° /20° 2.2 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 25° /20° 2.2 mm 6
7 Sept. Sunny
Sunny
 26° /20° 0 mm 6
8 Sept. Sunny
Sunny
 26° /20° 3.6 mm 6
9 Sept. Sunny
Sunny
 25° /20° 5.6 mm 6
10 Sept. Sunny
Sunny
 25° /19° 20.8 mm 6
11 Sept. Sunny
Sunny
 25° /20° 0.6 mm 6
12 Sept. Overcast
Overcast
 24° /18° 14.6 mm 5
13 Sept. Partly cloudy
Partly cloudy
 22° /18° 1.1 mm 6
14 Sept. Partly cloudy
Partly cloudy
 22° /17° 2.7 mm 5
15 Sept. Sunny
Sunny
 22° /17° 0 mm 5
16 Sept. Moderate rain
Moderate rain
 24° /17° 5 mm 1.2
17 Sept. Patchy rain possible
Patchy rain possible
 22° /17° 1.6 mm 1.3
18 Sept. Sunny
Sunny
 24° /18° 0 mm 1.4
19 Sept. Sunny
Sunny
 26° /20° 0 mm 1.4
20 Sept. Sunny
Sunny
 26° /21° 0 mm 1.6
21 Sept. Sunny
Sunny
 24° /20° 0 mm 6
22 Sept. Sunny
Sunny
 24° /20° 0 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 23° /19° 4.1 mm 5
24 Sept. Moderate rain
Moderate rain
 21° /16° 8.4 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 16° /14° 1.5 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 0.7 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 1.8 mm 4
28 Sept. Patchy rain possible
Patchy rain possible
 17° /13° 0.3 mm 3
29 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 5 mm 4
30 Sept. Sunny
Sunny
 22° /15° 0 mm 6
Next
Important Notice
Our weather forecast for Istria in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Istria forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
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Istria weather in September vs August vs October

Compare September weather in Istria with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherSunny
Sunny
Sunny
Sunny
Patchy rain possible
Patchy rain possible
Temperatures28°/23°23°/19°20°/16°
Rainfall152 mm89 mm135 mm
Wind16.9 km/h22.1 km/h22.3 km/h
Humidity62%66%74%
Rainy days11 days15 days19 days
Dry days20 days15 days12 days

Planning a trip to Istria? Discover the best time to visit

Istria in September - FAQ

What are the expected maximum and minimum temperatures in Istria during September?
During September, expect a variety of temperatures with highs around 23° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Istria during September?
Moderate rainfall is anticipated in Istria during September, with a total of 88.7 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Istria during September?
The average wind speed in Istria during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Istria in September?

As you prepare for your trip to Istria in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Istria, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Istria

Explore the daily rainfall trends and prepare for Istrias September weather 💧

UV exposure in Istria during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in Istria
Select a province for an accurate weather forecast
Grad PorečGrad PulaGrad Rovinj
Top locations in Istria
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PorečPulaRovinj
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Location coordinates Where is Istria?

Get accurate weather forecasts for Istria, located at latitude 44.868 and longitude 13.848. Stay updated with localized weather information tailored for Istria.

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