Summer in Vienna usually means warm days, long stretches of daylight, and a good dose of sunshine mixed with the occasional rain. Average daytime highs typically land around 25–27 °C (77–81 °F), but sometimes you’ll see the mercury push past 30 °C (86 °F).
Evenings cool off enough for comfortable strolls or outdoor dinners, which is honestly one of the best parts of summer here.
The season isn’t exactly dry. Short, intense showers and thunderstorms pop up pretty often, especially in July and August—the wettest months.
These bursts of rain usually don’t stick around for long, so once the clouds roll away, you can just keep exploring.
With up to 15 hours of daylight at the peak of summer, there’s plenty of time to enjoy Vienna’s parks, outdoor cafés, and festivals.
The warm air, bright sun, and fresh breeze make summer one of the most inviting times to be in the city.
Overview of Summer Weather in Vienna
Summer in Vienna brings warm days, mild nights, and a mix of sunshine with occasional showers.
You’ll find steady temperatures, moderate humidity, and a climate shaped by both geography and the quirks of the season.
Typical Summer Climate Patterns
From June through September, summer weather in Vienna stays warm, but rarely gets uncomfortably hot.
Daytime highs usually hit 24°C to 27°C (75°F to 81°F), with July almost always coming in as the warmest.
Nights cool down to about 15°C (59°F), so evenings are perfect for being outside.
Rain falls moderately, averaging about 60–80 mm per month, mostly as short showers or thunderstorms.
July and August get the most rain, but these showers don’t usually last.
Sunshine is generous, with about 8–9 hours of daylight on average during the height of summer.
Clouds thin out as the season goes on. Early summer can feel a bit more overcast, but by August, clear skies are much more common.
Winds stay light to moderate, so the weather feels pretty stable and calm—definitely calmer than what you’d find along the coast.
Vienna’s Geographical Influence on Weather
Vienna sits in northeastern Austria, close to the Danube River and edged by the Vienna Woods (Wienerwald).
This spot gives the city a transitional climate, shaped by both oceanic and continental influences.
The hills around Vienna block some of the stronger winds, so summers feel warm but not stifling.
The Danube Valley moves air through the city, which helps cool things down a bit, especially at night.
At about 170 meters (560 feet) above sea level, Vienna skips out on the chillier highland weather you’d find farther west.
Instead, you get a more stable summer, without those sudden cold snaps that hit the Alps.
This mix of geography means warm summers without the muggy humidity of southern Europe, and none of the damp, chilly feel of higher elevations.
Comparison with Other Seasons
Summer is hands-down the warmest and sunniest time of year in Vienna.
Winters are cold, with average lows around -1°C (30°F) and lots of gray days.
Snow can fall, but it’s nowhere near as heavy as what you’d see in the mountains.
Spring feels mild, with highs climbing from 10°C (50°F) in March to about 20°C (68°F) in May.
You’ll get more rain than in summer, but sunshine hours keep increasing.
Autumn cools off slowly, with September still feeling warm, but by November, highs drop to 9°C (48°F).
Days get shorter fast, and the clouds return.
Average Summer Temperatures
Summer in Vienna means warm days and mild nights, with July usually taking the crown as the hottest month.
From June through August, you get steady warmth, though the occasional heat wave can push things higher.
Daytime Highs and Nighttime Lows
In June, daytime highs usually reach 24–25 °C (75–77 °F), and nights drop to 13–14 °C (55–57 °F).
July, the warmest month, averages highs of 26–27 °C (79–81 °F) and lows near 15 °C (59 °F).
August stays close to July, with highs around 26 °C (79 °F) and lows near 15 °C (59 °F).
Nights are comfortable, and the cooler air makes evenings ideal for being out and about.
You’ll find summer temperatures warm, but they rarely get extreme for long.
Monthly Temperature Trends
Vienna warms up gradually as summer moves in.
In June, the average daily mean is about 19 °C (66 °F), so it’s warm but not overwhelming.
July peaks with an average mean of 21 °C (70 °F).
This is when you might run into a few hot days in a row, but cool breaks are common.
In August, the mean dips slightly to 20–21 °C (68–70 °F).
September starts off with lingering warmth, but cooling sets in pretty quickly.
Late June through early September is usually a safe bet for warm-weather plans.
Notable Temperature Extremes
Even though averages are moderate, Vienna does get the odd scorcher.
On the hottest days, temps can shoot up to 34–38 °C (93–100 °F).
The record? 38.5 °C (101 °F), reached in both July 2007 and August 2013.
On the flip side, even midsummer nights can sometimes dip close to 10 °C (50 °F), though that’s rare.
You’ll want to pack for both warm afternoons and cooler evenings—a light jacket at night comes in handy, and breathable clothes make hot days easier.
This kind of temperature swing is just part of Vienna’s continental climate, where warm and cool air can trade places quickly.
Rainfall and Precipitation Patterns
Summer in Vienna brings regular rainfall, balancing out the warm temperatures.
You’ll get moderate amounts of precipitation across the season, with July usually coming in as the wettest month.
Rain tends to show up in short bursts, not long soakers, but storms can pop up during hotter spells.
Monthly Average Rainfall
Vienna gets about 717 mm of precipitation annually, and summer brings its fair share.
June, July, and August generally see 55–80 mm per month.
July is the wettest, with around 80–83 mm, while June and August are a bit lower.
This isn’t extreme compared to other cities in Europe.
Vienna actually gets less summer rain than New York or Seoul, but more than Perth.
Showers and brief thunderstorms are the norm, not all-day rain.
| Month | Avg. Rainfall (mm) |
|---|---|
| June | ~70 mm |
| July | ~80–83 mm |
| August | ~65–70 mm |
These amounts keep the parks green, but you’ll still see plenty of dry, sunny days.
Frequency of Rainy Days
Expect 10–13 rainy days per summer month in Vienna.
July usually brings about 13 days with measurable rain, while June and August average 11–12 days.
Most rain days just mean light or moderate showers.
It’s common for rain to last an hour or two, then clear up, so your plans won’t usually get ruined—though an umbrella isn’t a bad idea.
Compared to winter, summer rain days are fewer, but the rain comes in quicker bursts.
This can make things feel humid after a storm.
Storms and Heavy Rain Events
Thunderstorms pop up most often in July and August.
They usually hit in the late afternoon or evening, when the day’s heat has built up.
You’ll get short, heavy downpours, gusty winds, and sometimes lightning.
Severe storms aren’t common, but they do happen a few times each summer.
Streets can briefly flood during a really heavy rain, but Vienna’s drainage usually takes care of it fast.
Storms bump up the humidity, so evenings can feel warmer.
Light rain gear and some flexibility in your schedule help you handle sudden weather changes.
Sunshine and Daylight Hours
Vienna’s summer days stretch long, with plenty of daylight and lots of sunshine.
The amount of sun shifts from early to late summer, but you’ll get bright afternoons and long evenings.
You’ll definitely notice the difference compared to the cloudier months.
Average Daily Sunshine
During summer, Vienna gets some of the highest daily sunshine totals of the year.
In June, you’ll see about 8 hours and 18 minutes per day.
July peaks at 8 hours and 34 minutes.
August follows with about 8 hours and 3 minutes.
That’s nearly half the daylight hours spent in direct sun.
For comparison, winter months barely break 2 hours a day, so the change is dramatic.
Afternoons are usually the brightest.
The sun climbs to over 60° above the horizon in June and July, so midday brings plenty of light and warmth.
Longest Daylight Periods
Day length in Vienna shifts quickly through the year, but summer gives you the longest stretches.
Around the June solstice, there’s nearly 16 hours of daylight.
July still offers more than 15 and a half hours.
August shortens to about 14 hours and 17 minutes.
You get to enjoy evenings outdoors without feeling rushed.
In June and July, sunset often lands past 8:30 p.m., which is perfect for late dinners or city walks.
Winter is the opposite—December brings just over 8 hours of daylight, almost half of what you get in midsummer.
That’s a big shift, and it’s one reason summer feels so good for sightseeing.
Cloud Cover and Brightness
Even with long days, not every hour is sunny.
On average, 53% to 57% of daylight hours from June through August are bright and clear.
The rest of the time, skies are partly cloudy or hazy—full overcast is less common than in winter.
So even on days with clouds, you’ll still get several hours of sun.
Compared to spring and autumn, summer is the most reliable for consistent brightness.
Weather can still surprise you, though.
Some mornings start gray and clear up, while others stay sunny all day.
If you keep your plans flexible, you can catch the best of the bright stretches.
Humidity and Air Quality
Vienna’s summer climate mixes moderate warmth with pretty manageable humidity.
Relative humidity usually stays comfortable, though it shifts a bit month to month.
These changes affect how the air feels and can play into air quality too.
Typical Relative Humidity Levels
During summer, Vienna’s average relative humidity lands between 55% and 65%.
That’s moderate, so you don’t get that heavy, sticky feeling you might find in more tropical spots.
At these levels, sweat can still evaporate pretty well, which helps your body stay cool.
The air doesn’t feel too dry or too damp, making it easy to enjoy walks, outdoor meals, or even a bike ride along the Danube.
For comparison, winter humidity in Vienna can climb above 70%, but with the cold, it feels totally different.
In summer, the mix of warmth and moderate humidity means you can stay active outside without much discomfort.
Humidity Variation by Month
Humidity shifts a bit as summer rolls in. In June, you’ll usually find levels hovering near 60%, matching up with those mild temps in the low 20s °C (70s °F).
July doesn’t change much, with humidity holding close to 61% while daytime highs reach about 27°C (80°F).
When August arrives, the air still feels pretty similar, often between 58% and 62%. You probably won’t notice any big swings in how muggy it feels from one summer month to the next.
For some context, April is usually the driest month, with relative humidity dropping to about 52%. December tops the charts as the most humid, averaging 77%. So, summer lands right in the middle, offering more balanced conditions compared to the extremes you’ll get in other seasons.
Effects on Comfort and Health
Moderate humidity in summer really helps with outdoor comfort. Sweat evaporates well at these levels, so you’re less likely to feel overheated. That makes sightseeing, hiking, and other activities a lot more manageable.
Air quality gets a boost too. Vienna’s summer air rarely aggravates breathing issues, unlike places that are super humid or bone dry. Folks with asthma or allergies might still notice pollen, but the humidity itself isn’t usually a problem.
If you’re used to coastal or tropical climates, you’ll probably notice Vienna’s summer air feels lighter. The balance between temperature and humidity just creates a comfortable space for both activity and relaxation.
Summer Weather Tips for Visitors
Vienna’s summer weather can flip between warm, pleasant days and sudden hot spells. You’ll want to be ready for cooler evenings and the occasional intense heat, but don’t forget to enjoy those long daylight hours and outdoor events.
What to Pack for Vienna in Summer
Pack light and breathable clothes, since daytime highs often hit the mid-20s °C (70s °F). Some days will climb above 30 °C (86 °F), so a mix of short sleeves, lightweight trousers, and a sun hat is a smart move.
Evenings can cool off, especially in June and September. Toss in a light sweater or jacket for outdoor dinners or late walks.
Walking shoes are a must. Exploring Vienna’s historic center on foot is the way to go, but those cobblestone streets can be rough on sandals.
Remember to bring sunscreen, sunglasses, and a refillable water bottle. You’ll find public fountains all over the city, and the water’s safe to drink, which saves you from buying bottled water.
Staying Comfortable During Heatwaves
Vienna’s average summer temperatures usually feel mild, but sometimes heatwaves push highs above 35 °C (95 °F). These spells can feel humid, especially in July and August.
Try to do your outdoor sightseeing early in the morning or later in the afternoon. Spend midday indoors at museums, cafés, or under the shade in parks. Most cultural sites have air conditioning, which gives you some relief from the heat.
Carry water and look for shaded spots along the Ringstrasse or in big green spaces like the Prater. Lighter meals are easier to handle during the hottest hours, so skip the heavy stuff if you can.
Public transport usually runs reliably and most lines have air conditioning, so it’s a good backup when walking just isn’t comfortable.
Outdoor Activities and Weather Considerations
Summer in Vienna brings long daylight hours, sometimes up to 15 hours in June. That means you’ve got plenty of time for outdoor activities.
You might spend an afternoon picnicking in Stadtpark or hop on a bike for a ride along the Danube. Evening concerts in open-air venues? Absolutely worth it.
July afternoons often see thunderstorms roll in. Pack a compact umbrella or a light rain jacket, just in case.
If you want to visit vineyards around the city or hike in the Vienna Woods, try heading out early. You’ll dodge the harshest sun and, hopefully, those late-day storms.
Summer draws plenty of outdoor festivals, film screenings, and music events. I’d recommend checking schedules ahead of time, but keep your plans flexible—Vienna’s weather likes to keep things interesting.