How warm is it in Poreč in September?

Daytime highs averaged 23.9 °C, night-time lows 18.1 °C. The highest value of the past 10 years was 31.8 °C (8 Sep 2026), the lowest 10.1 °C (26 Sep 2018).

How often does it rain in Poreč in September?

On average there were 11.6 rain days (at least 1 mm) with 121 mm of precipitation in total.

🇭🇷 Weather in Poreč in September

This is what the weather in Poreč (Istria, Croatia) was like in September in 2017–2026.

Key facts at a glance

Prevailing weather: Sunny

Avg. daytime high

23.9 °C

21.2 °C – 26.0 °C

Avg. night-time low

18.1 °C

16.5 °C – 19.3 °C

Avg. rain days in period

11.6

39 % of days · ≥ 1.0 mm

Avg. precipitation in period

121 mm

49.2 mm – 246 mm

Avg. sunshine per day

n/a

Sunshine duration is not available from this data source.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 31.8 °C (8 Sep 2026) · Lowest temperature 10.1 °C (26 Sep 2018) · Avg. daily peak wind 21 km/h

Weather mix of all days

77Sunny
66Partly cloudy
19Cloudy
47Light rain
69Rain

Summary

On average 23.9 °C during the day and 18.1 °C at night.
On average 11.6 rain days (Rain day = at least 1.0 mm of precipitation) with 121 mm of precipitation in total.
Prevailing: Sunny.
Warmest year: 2026 (avg. 26.0 °C), coolest: 2017 (avg. 21.2 °C).
Wettest year: 2017 (246 mm), driest: 2023 (49.2 mm).
Extremes: 31.8 °C on 8 Sep 2026 and 10.1 °C on 26 Sep 2018.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max26.0°Avg. min19.3°
Rain days
8 Rain days
Precipitation
78.7 mm
Avg. sunshine per day
n/a
Sea temperature
–
Max 31.8 °C · Min 14.6 °C
2025
Avg. max23.8°Avg. min18.8°
Rain days
12 Rain days
Precipitation
109 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 27.1 °C · Min 13.7 °C
2024
Avg. max23.5°Avg. min18.2°
Rain days
16 Rain days
Precipitation
140 mm
Avg. cloud cover
65 % cloudy
Sea temperature
–
Max 31.5 °C · Min 12.3 °C
2023
Avg. max24.8°Avg. min19.0°
Rain days
10 Rain days
Precipitation
49.2 mm
Avg. cloud cover
39 % cloudy
Sea temperature
–
Max 27.0 °C · Min 15.5 °C
2022
Avg. max22.9°Avg. min18.0°
Rain days
17 Rain days
Precipitation
231 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 28.3 °C · Min 12.3 °C
2021
Avg. max24.3°Avg. min17.6°
Rain days
8 Rain days
Precipitation
66.8 mm
Avg. cloud cover
45 % cloudy
Sea temperature
–
Max 28.5 °C · Min 13.7 °C
2020
Avg. max24.3°Avg. min18.0°
Rain days
9 Rain days
Precipitation
146 mm
Avg. cloud cover
41 % cloudy
Sea temperature
–
Max 29.0 °C · Min 11.9 °C
2019
Avg. max23.7°Avg. min17.6°
Rain days
11 Rain days
Precipitation
87.2 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 29.6 °C · Min 12.9 °C
2018
Avg. max24.8°Avg. min18.1°
Rain days
8 Rain days
Precipitation
54.9 mm
Avg. cloud cover
43 % cloudy
Sea temperature
–
Max 28.2 °C · Min 10.1 °C
2017
Avg. max21.2°Avg. min16.5°
Rain days
17 Rain days
Precipitation
246 mm
Avg. cloud cover
65 % cloudy
Sea temperature
–
Max 24.4 °C · Min 12.4 °C

Frequently asked questions

How warm is it in Poreč in September?: Daytime highs averaged 23.9 °C, night-time lows 18.1 °C. The highest value of the past 10 years was 31.8 °C (8 Sep 2026), the lowest 10.1 °C (26 Sep 2018).
How often does it rain in Poreč in September?: On average there were 11.6 rain days (at least 1 mm) with 121 mm of precipitation in total.

Check your exact travel dates

Choose your travel period – we show the weather for exactly those days.

Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)