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
1991.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-13.41991-01-31-3.72430
February-17.41991-02-15-7.726120
March-2.11991-03-052.8500
April-1.71991-04-223.6400
May3.91991-05-098.5000
June7.51991-06-0612.5001
July10.61991-07-1916.1000
August9.41991-08-2814.5000
September2.51991-09-0910.2000
October-6.01991-10-285.7700
November-6.11991-11-012.41000
December-11.91991-12-11-5.33050