Hennef Sieg, in North Rhine-Westphalia, Germany, is home to roughly 48,000 people in the Central European time zone at 50.8°N latitude.
In 2025, Hennef Sieg averaged an annual temperature of 53°F, with hottest temperatures reaching 100°F in July and lowest around 22°F in December. The city received approximately 32 inches of precipitation during the year.
View historical weather for Hennef Sieg · More cities in North Rhine-Westphalia