Your August weather guide
HotWeather in Vienna in August
August is a good time to visit Vienna if you like warm city breaks, but it is not a reliably dry choice. Average highs are around 26°C, with nights falling to about 16°C, so light daytime clothing and an evening layer make sense. The catch is rain on about 10 days during the month. Go prepared to adjust outdoor plans, and leave room for a slower pace when the afternoon heat builds.
Long-term climate averages for Vienna, not a forecast · 1991-2020
Vienna, month by month
Your snapshot
At a glance
The useful details for Vienna.
- Average daytime high
- 25.7°C
- 9 in 10 days stay below 32°C
- Average night-time low
- 16.1°C
- coldest 10% of nights: 13°C or lower
- Compared with London
- +4.3°C
- London averages 21.4°C in August
- Sunshine per day (est.)
- 7.1h
- 50% of 14.1 h of daylight
- Rainy days (1 mm+)
- 10
- 70 mm over the month
- Humidity
- 67%
- Days over 25°C
- 55%
- 17% over 30°C
- Record high 1991-2020
- 38.0°C
- 2013-08-08
- Record low 1991-2020
- 8.3°C
- 1993-08-30
- Flight from London
- ≈ 2 h 18 min
- 1232 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How August compares
August is the 2nd warmest month of the year in Vienna. Against London's average high of 21.4°C in August, Vienna is 4.3°C warmer by day and 2.6°C warmer at night.
Daytime and night-time in August
The typical August day in Vienna peaks at 25.7°C, but that is an average: the warmest 10% of days reach 31.5°C or more. About 55% of days top 25°C and 1 in 6 pass 30°C. Nights average 16.1°C; one night in ten drops to 12.6°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 38.0°C (2013-08-08) and the coldest night 8.3°C (1993-08-30).
Rain in August
Wet (more than 8 rainy days): about 10 days with 1 mm or more, 70 mm in total. Year to year it varies a lot - the wettest August was 2002 with 158 mm, the driest 1992 with 17 mm. Humidity averages 67%.
Sunshine and daylight
Around 7.1 hours of sunshine a day (estimated from cloud cover), 14.1 hours of daylight: the sun rises about 05:49 and sets about 20:09 local time in mid-August. Average cloud cover is 49%.
Is August a good time to visit Vienna?
Yes - it is one of the better months: hot days, manageable rain and long sunny days. The best months for Vienna on our scoring are August, July, June; months averaging 25°C or more: Jul, Aug.
Warm days, with some hotter spells
Vienna in August will generally feel warmer than London, rather than simply offering familiar British summer temperatures. Days reach 25°C on 55% of occasions, making light, breathable clothes a sensible default. More demanding heat is a possibility too: 16% of days reach 30°C. If you find hot city streets tiring, put longer walks earlier in the day and keep the middle of the afternoon flexible. Accommodation with cooling is a sensible preference if heat affects your sleep. August suits travellers who enjoy warmth and do not mind taking breaks; it is less comfortable for anyone hoping to walk all day without thinking about the temperature.
Plenty of daylight, but keep a rain option
There is useful scope for outdoor time, with about 7.1 hours of sunshine within 14.1 hours of daylight. That does not make August a dry-weather guarantee: about 10 rainy days mean waterproofs deserve space in your bag. A compact umbrella or light rain jacket is more practical than relying on sunshine throughout the trip. Keep outdoor plans movable and allow for indoor breaks when rain arrives. The monthly figures do not tell you how long an individual wet spell will last, so they are not a reason to write off whole days. This is a month for flexible planning, rather than an itinerary that depends on staying outside.
A little perspective
Vienna through the year
August is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|
| January | 3.1°C | -2.8°C | 2.4 | 35 | 8 | 0% |
| February | 5.5°C | -2.1°C | 3.3 | 32 | 8 | 0% |
| March | 10.1°C | 1.1°C | 4.3 | 46 | 9 | 0% |
| April | 15.7°C | 5.5°C | 5.9 | 45 | 9 | 2% |
| May | 19.9°C | 10.4°C | 6.3 | 73 | 12 | 13% |
| Junebest | 23.7°C | 14.2°C | 6.9 | 76 | 12 | 38% |
| Julybest | 25.8°C | 16.3°C | 7.3 | 78 | 12 | 58% |
| AugustSelectedbest | 25.7°C | 16.1°C | 7.1 | 70 | 10 | 55% |
| September | 20.3°C | 11.9°C | 5.4 | 72 | 9 | 12% |
| October | 14.6°C | 7.2°C | 3.8 | 48 | 9 | 0% |
| November | 8.6°C | 2.8°C | 2.4 | 44 | 9 | 0% |
| December | 3.8°C | -1.6°C | 2.3 | 39 | 9 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in August
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Brazil · 26°C by day · sea 22°C
Rio de Janeiro
Cape Verde · 26°C by day · sea 26°C
Sal
Portugal · 26°C by day · sea 23°C
Madeira
Mauritius · 25°C by day · sea 24°C
Flic en Flac
Czechia · 25°C by day
Prague
A little more detail
Vienna in August FAQs
Plain answers, grounded in the averages.
Is Vienna hot in August?
Vienna is hot in August: the average daytime high is 25.7°C and nights average 16.1°C. About 55% of August days reach 25°C or more.
How much does it rain in Vienna in August?
Vienna sees about 10 rainy days (1 mm or more) and 70 mm of rain in a typical August. The wettest August between 1991 and 2020 was 2002 (158 mm) and the driest was 1992 (17 mm).
How sunny is Vienna in August?
Vienna gets around 7.1 hours of sunshine a day in August out of 14.1 hours of daylight (estimated from average cloud cover).
How does Vienna compare with the UK in August?
Vienna is on average 4.3°C warmer than London by day in August (25.7°C against 21.4°C).
What is the hottest August on record in Vienna?
Between 1991 and 2020 the hottest August day in Vienna reached 38.0°C on 2013-08-08, and the coldest night dropped to 8.3°C on 1993-08-30.
How much warmer is Vienna than London in August?
Vienna's average daytime high is 25.7°C, compared with London's 21.4°C - a difference of 4.3°C. That is enough to make lighter clothing and breaks from the afternoon heat more relevant than they might be at home.
Will I need a jacket in the evening?
A light jacket or jumper is sensible. The average night low is 16.1°C, but the coldest 10% of nights fall to 12.6°C or below. Do not pack only for hot afternoons, especially if you plan to stay out late.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at Vienna. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C