What do Ta and Td in Meteonorm data table stand for respectively?

In the meteorological data table, ta stands for average ambient temperature and Td stands for average relative humidity. These data are calculated according to the meteorological observation records in a certain area.

If you find that Ta and Td in the Meteonorm data table are different from the actual weather records, it may be because Meteonorm uses the final meteorological observation data, and the weather records you query are real-time data. In the process of meteorological observation, there are sometimes measurement errors, which may lead to some differences between the actual meteorological records and the final meteorological observation data.

In addition, Ta and Td in the Meteonorm data table are calculated according to certain rules, which may be different from the actual weather records. For example, Ta is calculated according to the daily average temperature, while the actual weather record is calculated according to the daily maximum and minimum temperature. Therefore, it is necessary to pay attention to these differences when comparing Ta and Td in Meteonorm data table with actual weather records.