Logger information At 39 measuring sites the data logger Easy Log EL-USB-2 (resolution of 0.5 °C, specific device error of 0.5 K between 0-30 °C) was installed inside a radiation screen (white plastic, passive ventilation), on a metal pole 1.70 m above ground level and placed facing north. Measuring in 10-minute intervals (instantaneous values) Data structure The first row contains the column headers of the data: time [yyyy-mm-dd hh:mm:ss UTC+2], temperature [degree celsius], humidity [%rh], dewpoint [degree celsius] For every sample point there are 2 files because the data was retrieved once during the measurement period and the logger was newly started. Only logger "Ya" has just one file. More information about the measurement setup and the location (e.g. SVF) is found in the publication: How cool are allotment gardens? A case study of nocturnal air temperature differences in Berlin, Germany by Annemarie Tabea Rost, Victoria Liste, Corinna Seidel, Lea Matscheroth, Marco Otto, Fred Meier, and Daniel Fenner