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
1919.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-3.71919-01-311.3900
February-12.51919-02-11-2.21740
March-4.21919-03-202.9500
April0.01919-04-236.4100
May3.21919-05-157.4000
June7.51919-06-0513.8001
July11.51919-07-1514.7000
August9.01919-08-2614.6000
September6.01919-09-2412.9000
October0.21919-10-136.9000
November-7.51919-11-181.8900
December-5.61919-12-19-1.22500