Description of elements in the header
m_tnnmonthly minimum temperature
m_tnndthe day with the monthly minimum temperature
m_tnathe monthly mean of the daily minimum temperatures
m_dtn0number of frost days with a minimum temperature of ≤ 0 °C
m_dtn10number of days with a minimum temperature of ≤ -10 °C
m_dtn20number of warm nights with a minimum temperature of ≥ 20 °C
1921.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-8.01921-01-260.8900
February-9.61921-02-12-2.41900
March-5.01921-03-091.41100
April-1.81921-04-046.1100
May6.61921-05-0212.4000
June8.91921-06-2213.6001
July11.31921-07-0517.2008
August12.01921-08-1517.5009
September2.61921-09-2910.6000
October-1.01921-10-286.4100
November-8.61921-11-270.71300
December-8.41921-12-01-2.32400