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
1998.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-11.41998-01-30-0.91610
February-10.21998-02-02-1.62010
March-9.41998-03-12-2.62500
April-0.81998-04-156.9100
May3.21998-05-249.7000
June7.61998-06-2014.5000
July9.11998-07-0915.2000
August7.61998-08-2614.7004
September4.41998-09-1510.8000
October0.21998-10-237.7000
November-6.51998-11-200.11400
December-14.81998-12-23-7.331130