June Heat Wave – Dresden’s Summer Brings New Record Temperatures

Sommer 2026 bestätigt den Erwärmungstrend – BUGA 2033 soll Impulse für ein klimaangepasstes Dresden setzen

With the heat wave at the end of June, Germany experienced a period of extreme weather, the effects of which were also clearly felt in Dresden. This brings into sharp focus the question of how Dresden can cope with rising temperatures, longer periods of drought, and heavy rainfall events. The 2033 Federal Horticultural Show (BUGA) is intended to serve as a catalyst for this. Through the creation of new and upgraded green spaces, climate-active areas, land de-sealing, and improved rainwater management, the BUGA aims to foster projects that will make a long-term contribution to a more climate-resilient and livable Dresden.

June 2026 ranks among the warmest since 1961
For eleven consecutive days—from June 18 to 28, 2026—the daily high at the Dresden Neustadt weather station reached or exceeded the 30-degree mark. On four consecutive days, it even reached 35 degrees. The heat wave peaked from June 26 to 28. Never before have three extremely hot days in a row—that is, days on which the high reached or exceeded 35 degrees Celsius—been recorded at the Klotzsche station. The previous daily high air temperature of 38.2 degrees Celsius, recorded on June 29, 2022, was surpassed both on June 27, 2026, at 38.6 degrees Celsius, and on June 28, 2026, at 39.6 degrees Celsius. In the city center, the thermometer rose to 40 degrees Celsius at several measuring stations.

In Dresden’s densely built-up Neustadt district—as is likely the case in other densely built-up neighborhoods—six consecutive tropical nights (nights during which the air temperature does not drop below 20 degrees Celsius) were recorded. On the night of June 27–28, temperatures in Neustadt did not fall below 26.1 degrees Celsius, and in Klotzsche they did not fall below 25.5 degrees Celsius—marking the warmest night in Dresden since 1961.

Overall, the monthly average temperature of 20.4 degrees Celsius was 3.1 degrees above the 1991–2020 average and 4.1 degrees above the average for the 1961–1990 climate reference period. It was the second-warmest June since 1961, following 2019.

Heat Wave Takes a Toll on Health
Heat places a heavy strain on the body—especially for vulnerable groups such as older adults, people with pre-existing conditions, pregnant women, and children. As a result, the number of emergency medical service calls rose significantly due to the high temperatures over the weekend of June 26–28. Three deaths directly attributable to the heat were documented in Dresden.

The high daytime and nighttime temperatures highlight the importance of green spaces and open areas for a climate-resilient city. Trees, green spaces, and unpaved surfaces can help provide shade and cool the city. This is precisely where BUGA can make an important contribution to long-term urban development.

July and August Were Less Unusual
As the summer progressed, the weather in the Dresden area was less unusual than in other parts of Western Europe. Temperatures in July were fairly average: At 19.8 degrees Celsius, the monthly average was 0.4 degrees above the 1991–2020 reference value. The number of summer days slightly exceeded the 1991–2020 average, while the number of hot days fell slightly short of it. August, which was rather changeable, was 1.2 degrees Celsius above the 1991–2020 reference value, at 20.3 degrees Celsius. There were four more summer days and four more hot days than the average.

Only a Slight Precipitation Deficit Despite the Heat
While June still showed a precipitation deficit of 21 percent and July one of 13 percent, the amount of rain in August was in line with the average for the period from 1991 to 2020. The downpours on August 17 and 19, caused by severe thunderstorms, were the main source of precipitation. Overall, the summer saw a precipitation deficit of 24 millimeters—or 10 percent—compared to the average for the period from 1991 to 2020. The August rainfall allowed the upper soil layers to replenish their water reserves. However, groundwater levels remain very low. It will take prolonged, heavy rainfall for the aquifers to replenish.

This highlights another challenge for urban development: Rainwater must be retained as long as possible where it falls, rather than running off quickly over impervious surfaces. Therefore, the principles of the “sponge city” are set to play an important role in the planning for BUGA 2033. Plans include, among other things, measures to reduce impervious surfaces, the creation of retention areas, and decentralized stormwater management.

Summer is 1.6 degrees warmer compared to 1991–2020
The summer of 2026 clearly demonstrated how climatic conditions are changing. While the first half of 2026 in Dresden was marked primarily by drought—with only 209 millimeters of precipitation from January through June, instead of 280 millimeters—Dresden endured extreme heat in June. The recorded temperatures are fully in line with the climate trend. With an average temperature of 20.2 degrees Celsius, the summer of 2026 in Dresden was 1.6 degrees warmer than the current reference period from 1991 to 2020 and 2.8 degrees warmer than the climate reference period (1961 to 1990). It was the sixth-warmest summer since 1961. The high amount of sunshine also fits the trend. Over the three summer months, there were a total of 777 hours of sunshine. This, too, is the sixth-highest figure since 1961. Compared to the current reference period from 1991 to 2020, the sun shone 99 hours more—an increase of 14.6 percent.

These developments show that adapting to heat, drought, and heavy rainfall is becoming increasingly important for Dresden. In addition to providing short-term protection from heat, the goal is therefore to make urban neighborhoods, green spaces, and public areas more resilient to the effects of climate change in the long term.

BUGA 2033 Creates Momentum for Climate-Adapted Urban Development
These goals are also reflected in the plans for BUGA 2033: In Südpark, the park landscape is to be further developed and strengthened as an important green space. The horse racing track is to be carefully redeveloped and better integrated into its surroundings. A new public recreational area is to be developed around the Leuben gravel lakes, which, together with the swimming area, will provide a place to cool off.

Mayor Dirk Hilbert: “Anyone who spent this summer in Dresden could feel just how important climate-adapted urban development is. With BUGA 2033, we have the momentum to translate existing goals and strategies into concrete actions more quickly. If long heat waves become the norm, we’ll need more cooling green corridors. And if long dry spells are interrupted only by heavy rainfall, ‘sponge city’ elements must absorb and store rainwater on-site. The necessity of BUGA is beyond question.”

The projects launched as part of the BUGA are thus intended to have an impact far beyond the 2033 exhibition year and to contribute permanently to a climate-resilient and livable city.