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
1923.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-12.21923-01-23-1.12110
February-7.61923-02-17-0.81900
March-0.41923-03-183.6300
April-5.01923-04-025.5700
May6.41923-05-2012.7000
June7.41923-06-0812.7001
July12.41923-07-0116.7002
August12.61923-08-2215.8003
September6.61923-09-2912.9000
October3.61923-10-189.6000
November0.81923-11-245.6000
December-17.01923-12-31-0.61330