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
1949.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-10.51949-01-29-1.62010
February-11.51949-02-03-2.41720
March-9.01949-03-06-1.01800
April0.41949-04-116.9000
May9.01949-05-1013.1000
June8.41949-06-2513.0000
July10.81949-07-2116.5003
August8.21949-08-2114.7001
September9.41949-09-2613.4000
October2.81949-10-307.9000
November-0.41949-11-305.6100
December-4.91949-12-260.61500