Credit: MeteoLux
On Wednesday 17 June 2026, Luxembourg's national weather portal, MeteoLux, issued a yellow weather warning for high temperatures across the country.
MeteoLux is indicating "potential danger" nationwide from 12:00 on Thursday 18 June until 00:00 on Friday 19 June 2026.
According to MeteoLux, moderate heat stress is expected, with fatigue and heat exhaustion possible during prolonged exposure or physical activity.
The weather service added that the warning level will be raised to orange from Friday.
