Vienna is currently facing an unprecedented heatwave, with temperatures projected to reach 40 degrees Celsius on Sunday, June 28. If reached, this would mark the first time the capital has hit this threshold in 150 years of meteorological records, according to current weather projections. The city remains under the highest heat warning level, with nightly lows expected to remain between 25 and 27 degrees.
Historical Context of the Heatwave
The current weather event stands in contrast to previous extremes recorded in the city. The highest temperature on record was registered on August 8, 2013, at the Innere Stadt weather station. Should the mercury hit 40 degrees this Sunday, it would surpass that historical benchmark. Michele Salmi of the weather service Ubimet reported to the “Standard” that upcoming nights could also break records for tropical heat, potentially exceeding the previous highs of 26.9 degrees recorded on August 2, 2017, and 23.0 degrees on July 23, 2015.

Did You Know? The current record for the highest temperature in Vienna was set on August 8, 2013, at the Innere Stadt weather station.
Public Safety and Official Response
Authorities and transport providers have initiated safety measures as the heat intensifies. The ÖBB has issued a heat warning for its passengers, and the highest heat warning level is currently in effect for Northeast Austria. Additionally, Caritas Wien is expanding its heat relief efforts and requesting donations to support those affected by the extreme temperatures. Debate has also emerged regarding the accessibility of public cooling zones, with the Green Party calling for their weekend opening, a move the SPÖ has resisted.
Expert Insight: The severity of this heatwave is defined not just by daytime peaks, but by the lack of nocturnal cooling.
What May Happen Next
Looking ahead, residents can expect continued extreme conditions through the middle of next week. Meteorological data suggests that a series of “tropical nights” is likely to persist. As the city manages these temperatures, the focus will remain on cooling strategies, such as the use of designated “cool zones” and natural swimming areas, to mitigate the impact of the ongoing heat.
Frequently Asked Questions
When is the temperature expected to reach its peak?
Forecasters anticipate the peak of the heatwave on Sunday, June 28, when temperatures could reach 40 degrees for the first time in 150 years of records.
What defines a “tropical night” in this context?
A tropical night occurs when temperatures do not fall below a certain high threshold, with current expectations for Vienna ranging between 25 and 27 degrees.
Are there specific warnings for travelers?
Yes, the ÖBB has issued a formal heat warning for its passengers, and the highest heat warning level is currently active for Northeast Austria.
How are you and your household preparing for these record-breaking temperatures?
