39.8 degrees: Absolute heat record in Vienna, and it remains hot into the week

Vienna experienced its hottest day on record Sunday, June 28, 2026, with temperatures soaring to an unprecedented 39.8 degrees Celsius in Stammersdorf. This reading surpasses not only the all-time June record for Austria but marks the highest temperature ever recorded in Vienna since measurements began.

The intense heatwave, which reached its zenith on Sunday, shows little sign of immediate relief. Forecasters predict that Monday will remain extremely hot, with temperatures potentially reaching 40 degrees Celsius in some areas. The sustained high temperatures also increase the risk of severe thunderstorms.

While Tuesday may bring some slight cooling, it is expected to be accompanied by high humidity. A more significant drop in temperatures, with daily highs falling below 30 degrees Celsius, is not anticipated until Thursday. Until then, residents are advised to take precautions against the extreme heat and be aware of the rising potential for severe weather events.