After basking in summer-like warmth with highs of up to 32°C, Germany is set for one of the most extreme weather shifts of the year.
Meteorologists warn that from September 22 onward, hot Saharan air will give way to a surge of cool Atlantic air, sending temperatures tumbling.
Within just a few days, daytime highs will drop by half, and the first hints of frost are likely in some regions.
From summer weekend to autumn chill
The shift will be felt almost immediately. Instead of sunshine and T-shirt weather, daytime highs will hover around 14–16°C starting Monday.
Nighttime temperatures are forecast to slip into single digits, marking the first genuinely chilly mornings of autumn.
Doctors caution that such abrupt swings can strain the cardiovascular system, especially for sensitive individuals.
Frost warnings for farmers and gardeners
By midweek, the cooling trend intensifies. Urban areas could see lows of 6–8°C, while rural regions may dip close to or even below 5°C.
Ground frost is possible in higher elevations—a clear warning for farmers and gardeners to protect crops and sensitive plants.
For many households, it also means the heating season has effectively begun.
Early snow in the Alps
The Alps will showcase the most striking side of this weather reversal. Meteorologists expect the snow line to sink dramatically, possibly reaching as low as 1,000 meters around September 24.
While much of Germany adjusts to damp, chilly mornings, mountain peaks could already be blanketed in the first snow of the season.
The end of late summer
Experts describe the shift as a true “cold air breakthrough.”
After a short-lived taste of Saharan heat, Germany now faces an abrupt entry into autumn.
The contrast could not be sharper: dust-laden skies one week, frost and mountain snow the next. For many, the message is clear—the summer of 2025 is over, and autumn has arrived with full force.
