Third warmest June on record
Also the second sunniest June on record and relatively dry. Severe storms in some regions.
It is already clear that this will be the third warmest June in Austria in recorded history. ‘Taking into account the forecast for the last few days of the month, June 2025 is 2.9 degrees above the average for the 1991 to 2020 climate period in Austria's lowlands and 3.7 degrees on the mountains,’ says climatologist Alexander Orlik from GeoSphere Austria, ‘which puts Austria's lowlands in third place in the series of the warmest June months in the 259-year measurement history and the mountains in third place in the 175-year mountain measurement series. In 1st and 2nd place in the lowlands and on the mountains are the June months of 2019 and 2003.’
Compared to the 1961-1990 climate period, which was not yet so strongly influenced by global warming, June 2025 was 4.8 degrees above average in the lowlands and 5.7 degrees above average in the mountains.
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Third warmest June in recorded history: The above-average warm (red) and cold (blue) Junes since 1767 are shown in comparison to the climate reference period 1961-1990, based on GeoSphere Austria HISTALP lowland data. The smoothed trend line is shown in black. © GeoSphere Austria.
Some GeoSphere Austria weather stations are currently recording the warmest June in recorded history, i.e. the highest monthly average temperature since measurements began. For example in Klagenfurt (series of measurements since 1813), Obergurgl (1941 metres above sea level, series of measurements since 1851) and at Sonnblick (S, 3109 metres above sea level, series of measurements since 1887).
On 26 June, GeoSphere Austria registered a new June heat record for the state of Carinthia at 38.3 °C in Feistritz ob Bleiburg. The previous June record in Carinthia was 38.0 °C, measured on 27 June 2019 in Hermagor and Dellach/Drautal.
There were also several new June heat records for the respective measuring station on 26 June 2025, for example 37.9 °C in Klagenfurt, 37.8 °C in Ferlach and 36.7 °C in Bad Radkersburg.
The number of hours of sunshine in June 2025 was also extreme. In the Austria-wide evaluation, it was 40 per cent above the long-term average. This means second place in the series of the sunniest Junes since the sunshine measurement series began in 1925. June 2019 is in first place with 47 per cent more hours of sunshine than the long-term average
June brought some severe regional storms with heavy rain, hail and squalls. However, it was relatively dry over the entire month and the whole of Austria, with 30 per cent less precipitation than the long-term average. The last time it was similarly dry in a June was in 2023, and significantly drier in June 2019 (- 56 per cent), 1976 (- 56 per cent) and 1887 (- 57 per cent).
While the cool May with little precipitation and the hot and dry June did not provide the right conditions for early flowering of grapevines, other plant species, such as sweet cherry and redcurrant, continued to develop early.
On average across Austria, the start of flowering of the grapevine was 6 days later than the long-term average 1991-2020, with onset on 7 June 2025, and about average compared to the long-term average 1961-1990.
In contrast, the onset of sweet cherry ripening averaged over Austria on 5 June 2025 was 7 days earlier than the long-term average for 1991-2020 and 12 days earlier than the long-term average for 1961-1990.
The onset of redcurrant ripening averaged over Austria on 14 June 2025 is currently 4 days earlier than the long-term average for 1991-2020 and 15 days earlier than the long-term average for 1961-1990.
Translated with DeepL.com (free version)