Forecast: up to 30 degrees possible this weekend

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In the coming days, the earliest hot day with 30 degrees in a calendar year is possible in Austria.
The weekend and Monday will bring plenty of sunshine and summery temperatures. It will be unusually warm during the day, with highs between 23 and 28 degrees. Occasionally, even 30 degrees are possible, especially on Sunday and Monday, Geosphere Austria reported on Friday. A hot day on Sunday would be ten days earlier than the previous record.

Earliest heatwave day with 30 degrees possible in Austria’s measurement history
The first “30” to date was recorded on April 17, 1934, in the city of Salzburg. The second earliest date for a heatwave day in Austria was April 20, 2018, and it was also in the city of Salzburg. The highest temperatures measured in April are around 30 degrees in all federal states, and almost all of them are at the end of the month. The temperature record for April is held by Lower Austria at 32.0 degrees on April 28, 2012, in Waidhofen/Ybbs; in Upper Austria, the peak value on the same date was 31.8 degrees in Braunau/Ranshofen. The highest temperature in April in Salzburg was 31.5 degrees on April 27, 2012, in Salzburg/Freisaal.

In Vorarlberg, 31.2 degrees on April 28, 2012, in Bregenz is in the history books; in Tyrol, 31.2 degrees on the same day in Kufstein. The Viennese April record was 31.2 degrees on 30 April 30, 2012, at the Innere Stadt measuring station, closely followed on the same date by Burgenland with 31.0 degrees in Neusiedl/See. The highest temperature in April in Styria was set some time ago, on April 24, 1968, at exactly 30.0 degrees in Leibnitz. In Carinthia, there has never been a “30” in the fourth calendar month; the temperature record here was 29.9 degrees on 7, 2011 in Pörtschach.

Global warming brings warmer weather earlier
The forecast highs for the coming days are around ten to 15 degrees above the typical values for early April. According to Geosphere, global warming is causing very warm weather to occur earlier and earlier. The 30-degree mark is now being reached much earlier in average years than it was a few decades ago.

“In the recent past, in the 1991–2020 climate period, the first 30 degrees was reached in Austria on average on May 19, with the typical fluctuation ranging from the beginning of May to the beginning of June,” explained Alexander Orlik, a climatologist at Geosphere Austria. “In the 1961–1990 climate period, the 30-degree mark was reached on average on May 30, with a typical fluctuation from mid-May to mid-June.”