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
1933.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-15.91933-01-30-4.92940
February-6.61933-02-18-1.22100
March-5.41933-03-021.11400
April-1.21933-04-103.7200
May5.61933-05-1710.4000
June8.11933-06-0912.7000
July10.81933-07-0116.0003
August9.91933-08-2915.6002
September3.81933-09-2010.3000
October3.11933-10-167.9000
November-4.01933-11-303.8300
December-17.91933-12-23-8.328110