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
1917.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-9.91917-01-28-1.81900
February-21.81917-02-05-10.328140
March-5.81917-03-010.71300
April1.41917-04-195.6000
May5.71917-05-2310.6000
June11.41917-06-1015.2000
July12.91917-07-1416.5000
August11.31917-08-3116.8004
September9.41917-09-2312.4000
October1.01917-10-087.7000
November-2.61917-11-183.3600
December-12.01917-12-09-3.52620