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
1974.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-7.51974-01-15-1.02000
February-3.61974-02-281.01000
March-4.21974-03-032.2900
April-1.61974-04-053.4500
May4.21974-05-109.3000
June7.71974-06-0812.3000
July8.21974-07-0913.7000
August10.01974-08-0815.8000
September1.41974-09-2810.8000
October-2.41974-10-314.2500
November-3.61974-11-101.41000
December-4.11974-12-170.51300