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
1981.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-16.91981-01-17-8.029140
February-7.61981-02-02-2.52000
March-4.61981-03-013.6400
April-2.41981-04-204.1200
May5.11981-05-0310.3000
June7.61981-06-2015.0000
July10.41981-07-0213.9000
August5.41981-08-3113.8001
September3.91981-09-1812.0000
October-1.01981-10-297.6100
November-6.01981-11-181.11300
December-12.81981-12-14-2.82120