Bavaria Faces Significant Heatwave as Temperatures Set to Soar

After a period of unseasonably cool, rainy weather, Bavaria is preparing for a dramatic shift as meteorologists forecast a substantial heatwave in the coming days. Residents who recently experienced chilly temperatures and persistent rainfall are now being advised to brace for a rapid rise in heat across the region.

Temperature Trends and Forecasts

At the beginning of the week, cool conditions are expected to persist. Overnight lows may drop to between 6 and 10 degrees Celsius, with daytime highs remaining modest--around 20 degrees in Nuremberg, 23 degrees in Regensburg, and as low as 10 degrees in elevated areas such as Großer Arber. Munich is forecasted to experience similar cool nights, with minimum temperatures of 6 degrees. By Tuesday, temperatures in Munich are set to reach 24 degrees, with isolated showers possible, though sunny intervals will predominate.

Understanding the 'Sheep Cold' Phenomenon

This recent cool spell aligns with the recurring meteorological pattern known as 'Schafskälte' or 'Sheep Cold.' Occurring primarily between June 4 and June 20, this phenomenon involves the influx of cold maritime air from the Atlantic or North Sea into southern Germany, leading to a noticeable dip in temperatures after an otherwise warm spring. While not guaranteed every year, climate records confirm its regular presence across decades, particularly following unusually warm and dry springs.

Heatwave Onset and Expected Impact

Midweek marks the onset of Bavaria's first major heatwave of the year. On Wednesday afternoon, cities such as Munich and Nuremberg will likely reach highs of 28 degrees, with Regensburg close behind at 29 degrees. Nighttime temperatures will remain in the double digits across the state, ranging from 13 to 17 degrees. These initial figures are only the beginning, as forecasts indicate a steady escalation in heat.

By Thursday, many locations are expected to exceed the 30-degree mark. The German Weather Service (DWD) projects that temperatures will continue to climb, with highs surpassing 35 degrees on Friday and potentially reaching up to 37 degrees on Saturday, especially in regions like Nuremberg, Regensburg, and the Lower Main. These conditions are expected to persist into the following week, with prolonged periods of elevated temperatures.

Health Implications of Prolonged High Temperatures

Extended periods of intense heat present notable risks, particularly for vulnerable populations such as the elderly and those living in densely built urban areas. With nighttime temperatures predicted to remain above 20 degrees, there is an increased likelihood of 'tropical nights,' where the lack of significant cooling can lead to heat stress and sleep disturbances. Public health authorities warn of potential overheating and circulatory problems, urging residents to take precautions, especially during midday hours.

Climate Patterns and May 2026 Report

The upcoming heatwave follows an already exceptional spring. Data from the DWD climate report shows that May 2026 was markedly warmer, drier, and sunnier than historic averages. Compared to the 1991-2020 reference period, spring temperatures were approximately one degree higher, while the deviation compared to 1961-1990 exceeded two degrees. Precipitation was significantly below average, with only about 100 millimeters of rainfall recorded across the state, less than half the typical 214 millimeters. Sunlight duration was also exceptional, with nearly 700 hours measured--almost 50 percent above the previous norm.

This trend culminated in a record-setting heat event in late May, when Regensburg reached 34 degrees, establishing a new monthly high for the area. Current forecasts suggest that this record may be surpassed by the end of the current week as the heatwave intensifies.