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
2013.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-10.82013-01-08-1.52210
February-7.22013-02-110.61200
March-9.22013-03-170.41500
April-0.12013-04-016.3100
May6.82013-05-1412.1000
June8.52013-06-2713.9003
July9.42013-07-0214.1000
August9.72013-08-1715.5001
September5.92013-09-089.7000
October-3.02013-10-057.4300
November-2.32013-11-284.8500
December-8.12013-12-11-2.12400