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
1911.m_tnnm_tnndm_tnam_dtn0m_dtn10m_dtn20
January-10.01911-01-31-1.42110
February-16.01911-02-10-5.62190
March-3.41911-03-011.01400
April-1.01911-04-065.5500
May4.81911-05-2211.7000
June8.31911-06-0313.6001
July10.01911-07-1016.4002
August11.01911-08-1816.4001
September7.01911-09-1912.1000
October-0.81911-10-186.9100
November0.01911-11-054.4300
December-3.41911-12-310.91100