Air temperature measurements from Automatic Weather Station (AWS) at Freiburg – Chemiehochhaus (FRCHEM) from 2025-01-01 to 2025-12-31 [L2]

Quality controlled and gap-filled continuous air temperature data from the urban rooftop weather station at Freiburg-Chemiehochhaus (FRCHEM, 7.8486ºE, 48.0011ºN, 323.5 m) using an actively ventillated and shielded psychrometer operated 2m above roof level. Quality controlled air temperature data are available and aggregated at 10min, 30min, hourly, daily, monthly and yearly resolution for the year 2025. Average, minimum and maximum air temperatures are provided on hourly, daily, monthly and annual scales. Characteristic hours and days are reported on daily, monthly and annual scales (e.g. summer days with T_max > 25ºC, hot days with T_max > 30º, desert days with T_max > 35ºC, tropical nights with T_min > 20°, frost days with T_min < 0ºC and ice days with T_max < 0ºC, all based on 00:00 - 24:00 UTC). Detailed information on gap-filled data is provided. Note: All times are provided in UTC, not local time. For more details read `FRCHEM_2025_AirTemperature_MetaData.txt`. Data between 2025-05-29T03:01:00Z and 2025-06-26T09:18:00Z from the actively ventilated psychrometer is not available due to a mechnaical failure of the fan. Instead data from a passively ventilated and screend backup-sensor (CS215) at the same station (FRCHEM) and same height is shown for the time period.