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
1964.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-24.21964-01-20-12.431200
February-12.81964-02-01-5.32550
March-11.01964-03-18-0.52020
April0.21964-04-096.2000
May3.21964-05-079.5000
June12.01964-06-3016.3000
July8.61964-07-0114.9001
August8.21964-08-2513.4000
September5.01964-09-1410.9000
October0.81964-10-067.1000
November-2.31964-11-274.3400
December-10.71964-12-09-1.82010