Dortmund is measuring its heat — with Decentlab sensors

Since summer 2025, a city-wide climate network has been mapping how heat spreads across Dortmund, Germany — running on many of our sensors.

The network covers 76 locations across the city, with every station mounted on a streetlamp and connected via LoRaWAN, delivering a fresh reading every few minutes. 

Two station types are in use:

• Compact stations carry the DL-SHT35, measuring air temperature and humidity.

• Extended stations combine the DL-ATM41 weather station with the DL-BLG black globe sensor, capturing wind, precipitation, solar radiation and more — and feeding into the UTCI (Universal Thermal Climate Index) that reflects how heat actually feels.

The data informs the city's heat action plan, its early warning systems, and its urban planning. Where would street trees help most? Which neighbourhoods barely cool down at night?

All of it is public: an interactive dashboard shows the current conditions at every location, hour by hour.

Explore the dashboard

More about the project