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
1913.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-14.01913-01-15-4.03030
February-10.01913-02-20-4.52510
March-8.01913-03-032.51100
April-2.01913-04-145.4400
May4.01913-05-0910.3000
June9.01913-06-1514.0000
July10.01913-07-0114.0000
August11.01913-08-0914.1000
September7.01913-09-1312.7000
October0.61913-10-126.7000
November-4.21913-11-242.8900
December-8.01913-12-21-1.41900