Frankfurt Heatwave: Extreme Temperatures and Severe Storms Forecast

The German Weather Service (DWD) has issued a heat warning for Frankfurt and the Rhine-Main region as temperatures are forecast to reach up to 38 degrees Celsius. The warning affects much of central and southern Hesse, with projections of humid heat and potential severe thunderstorms continuing through Saturday, June 20.

Why is Frankfurt under a heat warning?

The DWD issued a heat warning for Thursday, June 18, effective from 11 a.m. to 7 p.m. Temperatures on Thursday are expected to climb between 30 and 35 degrees Celsius. While the day starts sunny, the DWD reports that cumulus clouds will form, potentially bringing showers and thunderstorms to highland areas by the afternoon.

The warning extends across several federal states, specifically targeting central and southern Hesse, including Frankfurt. Temperatures are also expected to rise significantly in North Hesse.

Did You Know? The highest temperature ever recorded in Hesse during the month of June was 39.3 degrees Celsius, measured in Frankfurt on June 30, 2019.

What temperatures are expected this weekend?

Friday, June 19, may bring humid heat with maximum temperatures between 32 and 38 degrees Celsius. The DWD forecasts a mix of sun and clouds, though severe thunderstorms could develop during the afternoon.

Weekend weather 18/06/2026 – Heatwave on the way – Met Office weather forecast UK

Nighttime temperatures are expected to remain high, with lows between 15 and 21 degrees Celsius. This indicates the arrival of “tropical nights,” defined as nights where temperatures stay above the 20-degree mark.

On Saturday, June 20, temperatures are projected to reach between 31 and 37 degrees Celsius. The DWD expects partly cloudy skies with a continued risk of severe thunderstorms throughout the day and into Saturday night, when temperatures may range from 17 to 21 degrees Celsius.

Expert Insight: Samantha Carter notes that the combination of extreme heat and “tropical nights” prevents the human body from cooling down overnight, which increases the overall health burden. When these conditions are paired with the potential for severe thunderstorms, the region faces a volatile atmospheric shift that could lead to rapid weather changes.

How does this heatwave compare to previous records?

Current forecasts suggest temperatures could approach the all-time June record for the region. Friday’s potential peak of 38 degrees Celsius is only 1.3 degrees shy of the 39.3 degrees recorded in Frankfurt in June 2019.

The DWD warns that such heat levels can be dangerous to the human body and may lead to various health problems. To mitigate these risks, the agency advises residents to avoid heat where possible, drink sufficient water, and keep indoor spaces cool.

Frequently Asked Questions

When is the current heat warning active?
The warning for Thursday, June 18, is valid from 11 a.m. to 7 p.m.

What are the highest forecasted temperatures for the week?
The DWD predicts highs of up to 38 degrees Celsius on Friday, June 19.

What precautions does the DWD recommend?
The agency recommends drinking plenty of water, avoiding heat, and keeping indoor rooms cool to prevent health problems.

How do you prepare your home and routine for extreme heatwaves?