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
1931.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-14.81931-01-23-2.32410
February-3.81931-02-07-0.51800
March-7.61931-03-06-1.42400
April-4.61931-04-014.1700
May3.21931-05-0213.1000
June11.01931-06-2816.1001
July11.91931-07-3117.4007
August10.01931-08-2815.8002
September2.51931-09-289.9000
October-0.61931-10-206.0300
November-3.11931-11-022.01300
December-11.81931-12-20-4.32640