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
1977.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-16.41977-01-01-2.12230
February-6.61977-02-041.9900
March-6.41977-03-012.8600
April-1.41977-04-123.6800
May4.81977-05-2710.2000
June2.91977-06-0412.1000
July10.41977-07-2813.8000
August8.01977-08-2614.5000
September-0.71977-09-298.3100
October-0.11977-10-185.7100
November-6.21977-11-302.5800
December-13.51977-12-06-4.12730