How warm is it in Vienna in September?

Daytime highs averaged 21.9 °C, night-time lows 11.2 °C. The highest value of the past 10 years was 33.7 °C (3 Sep 2024), the lowest 2.3 °C (30 Sep 2018).

How often does it rain in Vienna in September?

On average there were 10.2 rain days (at least 1 mm) with 88.4 mm of precipitation in total.

🇦🇹 Weather in Vienna in September

This is what the weather in Vienna (Austria) was like in September in 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

21.9 °C

18.9 °C – 25.5 °C

Avg. night-time low

11.2 °C

9.1 °C – 13.6 °C

Avg. rain days in period

10.2

34 % of days · ≥ 1.0 mm

Avg. precipitation in period

88.4 mm

41.7 mm – 223 mm

Avg. sunshine per day

n/a

Sunshine duration is not available from this data source.

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 33.7 °C (3 Sep 2024) · Lowest temperature 2.3 °C (30 Sep 2018) · Avg. daily peak wind 18 km/h

Weather mix of all days

69Sunny
74Partly cloudy
34Cloudy
56Light rain
46Rain

Summary

On average 21.9 °C during the day and 11.2 °C at night.
On average 10.2 rain days (Rain day = at least 1.0 mm of precipitation) with 88.4 mm of precipitation in total.
Prevailing: Partly cloudy.
Warmest year: 2023 (avg. 25.5 °C), coolest: 2017 (avg. 18.9 °C).
Wettest year: 2024 (223 mm), driest: 2023 (41.7 mm).
Extremes: 33.7 °C on 3 Sep 2024 and 2.3 °C on 30 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. max23.8°Avg. min11.8°
Rain days
9 Rain days
Precipitation
43.3 mm
Avg. sunshine per day
n/a
Sea temperature
–
Max 33.4 °C · Min 7.2 °C
2025
Avg. max22.4°Avg. min11.6°
Rain days
13 Rain days
Precipitation
87.1 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 29.3 °C · Min 3.6 °C
2024
Avg. max21.6°Avg. min11.8°
Rain days
11 Rain days
Precipitation
223 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 33.7 °C · Min 4.1 °C
2023
Avg. max25.5°Avg. min13.6°
Rain days
8 Rain days
Precipitation
41.7 mm
Avg. cloud cover
37 % cloudy
Sea temperature
–
Max 30.8 °C · Min 10.7 °C
2022
Avg. max19.7°Avg. min10.1°
Rain days
16 Rain days
Precipitation
69.0 mm
Avg. cloud cover
71 % cloudy
Sea temperature
–
Max 26.8 °C · Min 4.6 °C
2021
Avg. max22.2°Avg. min11.2°
Rain days
7 Rain days
Precipitation
45.5 mm
Avg. cloud cover
52 % cloudy
Sea temperature
–
Max 28.8 °C · Min 4.9 °C
2020
Avg. max21.5°Avg. min10.7°
Rain days
10 Rain days
Precipitation
104 mm
Avg. cloud cover
52 % cloudy
Sea temperature
–
Max 28.2 °C · Min 2.9 °C
2019
Avg. max21.7°Avg. min10.6°
Rain days
8 Rain days
Precipitation
61.5 mm
Avg. cloud cover
60 % cloudy
Sea temperature
–
Max 30.9 °C · Min 3.8 °C
2018
Avg. max22.0°Avg. min11.3°
Rain days
8 Rain days
Precipitation
104 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 28.7 °C · Min 2.3 °C
2017
Avg. max18.9°Avg. min9.1°
Rain days
12 Rain days
Precipitation
105 mm
Avg. cloud cover
70 % cloudy
Sea temperature
–
Max 28.3 °C · Min 5.5 °C

Frequently asked questions

How warm is it in Vienna in September?: Daytime highs averaged 21.9 °C, night-time lows 11.2 °C. The highest value of the past 10 years was 33.7 °C (3 Sep 2024), the lowest 2.3 °C (30 Sep 2018).
How often does it rain in Vienna in September?: On average there were 10.2 rain days (at least 1 mm) with 88.4 mm of precipitation in total.

Check your exact travel dates

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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)