
Elements


Different countries estimate daily average temperatures using different methods and formulae. Also, the time intervals for observing minimum and maximum temperature differ and the time interval for accumulating 24h rainfall differ. The table below describes the different "Ele ID" values available for each element in the database. These recording characteristics are included when downloading the daily data. 



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Element 
Ele ID 
Description 
Unit 
 MAXIMUM TEMPERATURE (TX) 
  TX1  Maximum temperature unknown interval  0.1 °C 
  TX2  Maximum temperature 1818 UT  0.1 °C 
  TX3  Maximum temperature 00 UT  0.1 °C 
  TX5  Maximum temperature morning previous day 06,07,08 until morning today (shifted 1 day back by ECA staff)  0.1 °C 
  TX6  Maximum temperature morning today 06,07,08 until morning next day  0.1 °C 
  TX7  Maximum temperature between 06 and 18 UT today  0.1 °C 
  TX8  Maximum temperature 2121 CET  0.1 °C 
  TX9  Maximum temperature morning previous day 09 h GMT until morning today (shifted 1 day back by ECA staff)  0.1 °C 
  TX10  Maximum temperature from 21:30 previous day until 21:30 CET  0.1 °C 
  TX11  Maximum temperature morning today 9 UTC until morning next day  0.1 °C 
  TX12  Maximum temperature 1919 UTC  0.1 °C 
  TX13  Maximum temperature within 0024, 1212 or 0606  0.1 °C 
  TX14  Maximum temperature 00 LT based on hourly intervals  0.1 °C 
  TX15  Maximum temperature 1717 CET  0.1 °C 
  TX16  Maximum temperature 2222 or 2323 UT  0.1 °C 
  TX17  Maximum temperature 1818 CET  0.1 °C 
 MINIMUM TEMPERATURE (TN) 
  TN1  Minimum temperature unknown interval  0.1 °C 
  TN2  Minimum temperature 1818 UT  0.1 °C 
  TN3  Minimum temperature 00 UT  0.1 °C 
  TN5  Minimum temperature morning previous day 06,07,08 until morning day  0.1 °C 
  TN6  Minimum temperature between 18 UT previous day and 06 UT today  0.1 °C 
  TN8  Minimum temperature 2121 CET  0.1 °C 
  TN9  Minimum temperature morning previous day 09 h GMT until morning today  0.1 °C 
  TN10  Minimum temperature from 21:30 previous day until 21:30 CET  0.1 °C 
  TN11  Minimum temperature 1919 UTC  0.1 °C 
  TN12  Minimum temperature within 0024, 1212 or 1818  0.1 °C 
  TN13  Minimum temperature 00 LT based on hourly intervals  0.1 °C 
  TN14  Minimum temperature 1717 CET  0.1 °C 
  TN15  Minimum temperature 2222 or 2323 UT  0.1 °C 
 MEAN TEMPERATURE (TG) 
  TG1  Mean temperature unknown interval  0.1 °C 
  TG3  Mean temperature 00 UT  0.1 °C 
  TG5  Mean temperature calculated as average of TN and TX  0.1 °C 
  TG6  Mean temperature calculated as weighted average of TN, TX and observations at 06, 12 and 18 UT (5 values)  0.1 °C 
  TG7  Mean temperature calculated as average of 3 or more observations each day  0.1 °C 
  TG8  Mean temperature calculated as weighted average of 06, 13 and 20 (twice) UTC  0.1 °C 
  TG9  Mean temperature 0606 UTC  0.1 °C 
  TG10  Mean temperature calculated as weighted average of 07:30, 14:30 and 21:30 (twice) CET  0.1 °C 
  TG11  Mean temperature 1818 UT  0.1 °C 
  TG12  Mean temperature calculated as average of 00, 06, 12, 18 UTC  0.1 °C 
  TG13  Mean temperature calculated as average of 01, 07, 13 and 19 UT  0.1 °C 
  TG14  Mean temperature calculated as average of 07, 14, 21, 21 CET  0.1 °C 
  TG15  Mean temperature calculated as average of 8 observations  0.1 °C 
  TG16  Mean temperature calculated as average of 07, 14, 21 CET  0.1 °C 
 SUNSHINE (SS) 
  SS1  Daily sunshine  0.1 Hours 
  SS2  Daily sunshine, unknown interval  0.1 Hours 
  SS3  Daily sunshine, 00 UT  0.1 Hours 
  SS4  Daily sunshine 1818 UT  0.1 Hours 
  SS5  Daily sunshine 2121 CET  0.1 Hours 
 SNOW DEPTH (SD) 
  SD1  Mean daily snow depth, 00 UT  1 cm 
  SD2  Mean daily snow depth, unknown interval  1 cm 
  SD3  Snow depth at 6,7,8 am (local time)  1 cm 
  SD4  Snow depth at 07:30 CET  1 cm 
  SD5  Snow depth at 6 or 9 UTC  1 cm 
  SD6  Snow depth at 12 UTC  1 cm 
  SD7  Snow depth at 05:40 UTC  1 cm 
  SD8  Snow depth at 9 UTC  1 cm 
 PRECIPITATION AMOUNT (RR) 
  RR1  Precipitation amount unknown interval  0.1 mm 
  RR2  Precipitation amount morning previous day 06,07,08,09 until morning today (shifted 1 day back by ECA staff)  0.1 mm 
  RR3  Precipitation amount morning today 06,07,08 until morning next day  0.1 mm 
  RR4  Sum of 12hourly precipitation of observations at 06 and 18 UT (2 values). Date of 18 UT  0.1 mm 
  RR5  Precipitation amount morning today 07:30 CET until morning next day  0.1 mm 
  RR6  Precipitation amount 1818 UT (sum of 4 values)  0.1 mm 
  RR7  Precipitation amount 0  0 UT  0.1 mm 
  RR8  Sum of 12hourly precipitation of observations at 18 UT today and 6 UT tomorrow (2 values)  0.1 mm 
  RR9  Precipitation amount morning today 06:00 UTC until morning next day  0.1 mm 
  RR10  Precipitation amount within 0024, 0707 or 0808  0.1 mm 
  RR11  Precipitation amount morning today 05:40 UTC until morning following day  0.1 mm 
  RR12  Precipitation amount 12 UT yesterday until 12 UT today  0.1 mm 
  RR13  Precipitation amount 2222 or 2323 UT  0.1 mm 
 SEA LEVEL PRESSURE (PP) 
  PP1  Sea level pressure at 12 UT  0.1 hPa 
  PP2  Mean sea level pressure, 00 UT  0.1 hPa 
  PP3  Mean sea level pressure calculated as weighted average of observations at 00, 06, 12 and 18 UT (4 values)  0.1 hPa 
  PP4  Sea level pressure at 06 UT  0.1 hPa 
  PP5  Sea level pressure, mean of 13, 20 UT previous day and 7 UT current day (shifted 1 day back by ECA staff)  0.1 hPa 
  PP7  Mean sea level pressure calculated as weighted average of observations at 00, 07, 13 and 18 UT (4 values)  0.1 hPa 
  PP8  Mean sea level pressure unknown interval  0.1 hPa 
  PP9  Sea level pressure, mean of 06, 13 and 20 UTC of the current day  0.1 hPa 
  PP10  Sea level pressure, mean of 7:30, 14:30 and 21:30 CET  0.1 hPa 
  PP11  Sea level pressure, mean 1818 UT  0.1 hPa 
  PP12  Sea level pressure, mean of 8:00 and 13:00 local time  0.1 hPa 
  PP13  Mean sea level pressure, 2121 UTC (8 values)  0.1 hPa 
  PP14  Mean sea level pressure, 2323 UTC (24 values)  0.1 hPa 
  PP15  Mean sea level pressure, mean of 7, 13, 20 UT current day  0.1 hPa 
  PP16  Mean sea level pressure, mean of daily minimum and maximum pressure  0.1 hPa 
  PP17  Mean sea level pressure, average of 7, 14 and 19 UT  0.1 hPa 
  PP18  Mean sea level pressure, average of 6, 12 and 18 UT  0.1 hPa 
  PP19  Mean sea level pressure calculated as average of 8 observations  0.1 hPa 
  PP20  Mean sea level pressure, mean of 7, 14, 21 UT current day  0.1 hPa 
  PP21  Mean sea level pressure calculated as average of observations at 07, 13 and 18 UT (3 values)  0.1 hPa 
  PP22  Sea level pressure at 9 AM LT  0.1 hPa 
  PP23  Mean sea level pressure, 00 UTC (8 values)  0.1 hPa 
 HUMIDITY (HU) 
  HU1  Relative humidity, mean of 0,7,13 18 UT current day  1 % 
  HU2  Relative humidity, unknown interval  1 % 
  HU3  Mean relative humidity, 00 UT  1 % 
  HU4  Relative humidity, average of 07:30, 14:30 and 21:30 CET  1 % 
  HU5  Relative humidity, mean of 7, 14 and 21 UTC  1 % 
  HU6  Relative humidity, mean 1818 UT  1 % 
  HU7  Relative humidity, mean of 7, 14 and 21 CET  1 % 
  HU8  Relative humidity, 2323 UTC (24 values)  1 % 
  HU9  Relative humidity, mean of 7, 14 and 19 UT  1 % 
  HU10  Relative humidity at 9.00 AM  1 % 
  HU11  Relative humidity at 21.00  1 % 
  HU12  Relative humidity at 9 AM LT calculated from dewpoint and air temperature  1 % 
  HU13  Mean relative humidity, 00 UTC (8 values)  1 % 
 WIND GUST (FX) 
  FX1  Maximum 3 second wind gust, 00 UT  0.1 m/s 
  FX2  Maximum 2 second wind gust, 00 UT  0.1 m/s 
  FX3  Maximum 10 second wind gust, 1818 UT  0.1 m/s 
  FX4  Maximum value of wind gust speeds 18  18 UT  0.1 m/s 
  FX5  Maximum 3 second wind gust, 1818 UT  0.1 m/s 
  FX6  Average wind gust from 23 UT previous day  22 UT today (24 values)  0.1 m/s 
  FX7  Maximum value of 15min wind speed measurements, 00 LT  0.1 m/s 
  FX8  Maximum 3 second wind gust, 99 LT  0.1 m/s 
 WIND SPEED (FG) 
  FG1  Average wind speed of 24 hourly measurements of 10min average (00 UT)  0.1 m/s 
  FG2  Average wind speed of measurements at 06, 12, 18, (00) UTC  0.1 m/s 
  FG3  Average wind speed of 3 measurements at 06.30, 13.30 and 20.30 UTC  0.1 m/s 
  FG4  Average wind speed, mean of 7, 14 and 21 CET  0.1 m/s 
  FG5  Average wind speed 18  18 UT, 8 3hourly observations  0.1 m/s 
  FG6  Average wind speed, mean of 4 10min averages of 00, 07, 13 and 18 UT  0.1 m/s 
  FG7  Average wind speed of 24 hourly measurements (6 10min average per hour) 00 UT  0.1 m/s 
  FG8  Average 10minute wind speed from 23 UT previous day  22 UT today (24 values)  0.1 m/s 
  FG9  Average from 07h to 07h through a mechanical counter  0.1 m/s 
  FG10  Average wind speed of 24 hourly measurements of 15min average (00 LT)  0.1 m/s 
  FG11  wind speed at 9 AM LT  0.1 m/s 
  FG12  Average wind speed of 8 measurements of 10min average (00 UT)  0.1 m/s 
 WIND DIRECTION (DD) 
  DD1  Average vectorial wind direction calculated from 3 measurements at 06, 12 and 18 UTC.  degrees 
  DD2  Wind direction at time of maximum gust  degrees 
  DD3  Average vectorial windspeedweighted wind direction calculated from 3 measurements at 06.30, 13.30 and 20.30 UTC  degrees 
  DD4  Wind direction at 12 UTC  degrees 
  DD5  Average wind direction, mean of 00, 07, 13 and 18UT  degrees 
  DD6  Average vectorial 10minutes wind direction, 0  0 UTC  degrees 
  DD7  Average vectorial 2minute wind direction from 23 UT previous day  22 UT today (24 values)  degrees 
  DD8  Wind direction at 14 LT  degrees 
  DD9  Wind direction at 9 AM LT  degrees 
 CLOUD COVER (CC) 
  CC1  Mean daily cloud cover, 00 UT  oktas 
  CC2  Mean daily cloud cover, mean of 7, 13, 18 UT current day  oktas 
  CC3  Mean daily cloud cover, unknown interval  oktas 
  CC4  Mean daily cloud cover, mean of 7, 13, 20 UT current day  oktas 
  CC5  Mean daily cloud cover, average of 07:30, 14:30 and 21:30 CET  oktas 
  CC6  Mean daily cloud cover, mean of 7, 14 and 21 UTC  oktas 
  CC7  Mean daily cloud cover, 1818 UT  oktas 
  CC8  Mean daily cloud cover, average of 00, 13 and 18 UT  oktas 
  CC9  Mean daily cloud cover, average of 0, 6, 12 and 18 UTC  oktas 
  CC10  Mean daily cloud cover, 2323 UTC (24 values)  oktas 
  CC11  Mean daily cloud cover, average of 3hourly values, 00 UTC  oktas 
  CC12  Mean daily cloud cover, average of 7, 14 and 19 UT  oktas 
  CC13  Mean daily cloud cover, average of 6, 12 and 18 UTC  oktas 
  CC14  Mean daily cloud cover, mean of 7, 14, 21 CET  oktas 
  CC15  Mean daily cloud cover, mean of 8, 14 CET  oktas 
  CC16  Mean daily cloud cover, mean of 9, 15 CET  oktas 
  CC17  Mean daily cloud cover, average of 3,6,9,12,15,18,21,24 UT  oktas 