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
1940.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-21.11940-01-22-12.031210
February-24.91940-02-16-9.628150
March-10.61940-03-03-1.12110
April-1.01940-04-016.2400
May3.21940-05-1410.3000
June10.71940-06-0714.7000
July11.21940-07-3116.3001
August9.01940-08-2413.4001
September5.61940-09-1311.6000
October0.71940-10-297.4000
November-0.71940-11-285.0100
December-18.01940-12-28-8.230130