September 2024 will go down in history as the wettest in Austrian measurement history. According to Geosphere Austria, more than twice as much rain fell as in an average month at this time of year. Floods and mudslides were the result.
The heavy rain in the middle of the month set new September records at more than 80 weather stations in Austria. About 447 millimeters fell in St. Pölten. The second week of September brought a significant influx of cold air after a week-long heat wave. A low-pressure area moved from Italy via Austria to Eastern Europe.
“In most of Austria it rained 100 to 200 millimeters, in parts of Lower Austria, Vienna and Upper Austria even 250 to just over 400 millimeters,” Geosphere Austria said on Tuesday. Particularly in the north and east, the quantities were three to four times higher within five days than in an average for the whole of September.
Here is a graph of precipitation in September.
With an increase of 118 percent for the whole of Austria, the month now enters the wettest in history since 1858, followed by September 1899.
Unusual amounts of snow
The onset of cold air also brought snow to many valleys. “In Styria, for example, on September 13 there was five centimeters of snow at the Hall weather station near Admont (Liezen district) at 637 meters above sea level. Snow below 1,000 meters above sea level occurs on average every five years in September in Austria,” says climatologist Alexander Orlik from Geosphere Austria.
Here you see a message from Geosphere Austria.
New records were also set on the mountains. Because only the beginning of the month was warm, an “average to slightly above average monthly average temperature” was recorded for the entire month of September. “September 2024 was 0.7 degrees above average for the climate period 1991 to 2020 in the lowlands of Austria and 0.1 percent lower in the top regions.”
Source: Krone
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