World Weather Records (WWR)

Initiated by a resolution at the 1923 International Meteorological Organization (IMO) Conference, WWR was a monumental international undertaking producing a large volume of monthly temperature, precipitation and pressure data from hundreds of stations around the world, some with data starting in the early 1800s. The WWR project continues today under the auspices of the WMO with the digital publication of decadal updates to the climate records for stations worldwide.

World Weather Records (WWR) have been published since 1927, and include monthly mean values of pressure, temperature, precipitation, and where available, station metadata notes documenting observation practices and station configurations. Data were supplied by National Meteorological Services of the WMO Members. The first issue included data from earliest records available at that time up to 1920. Data have been collected for periods 1921-30 (2nd Series), 1931-40 (3rd Series), 1941-50 (4th Series), 1951-60 (5th Series), 1961-70 (6th Series), 1971-80 (7th Series), 1981-90 (8th Series), 1991-2000 (9th Series), and 2001-2010 (10th series). The WWR process of collection for the 11th series (2011-2020) is still on going.

Data include monthly and annual means of:

  • Station pressure
  • Sea level Pressure
  • Mean Temperature
  • Maximum Temperature
  • Minimum Temperature
  • Precipitation,
and as practiced in recent years
  • Relative Humidity.

More information to WWR is available at the World Data Centre for Meteorology, National Centers for Environmental Information (NCEI) in Asheville, USA.


Useful reference (Guidelines, templates, tools):

  • Guidelines for the submission of the World Weather Records 2011+ (WMO-No. 1186, WMO, 2021)
  • Directives concernant la communication des World Weather Records à partir de 2011 (WMO-No. 1186, WMO, 2021)
  • Directrices para la presentación de los Registros meteorológicos mundiales a partir de 2011 (WMO-No. 1186, WMO, 2021)
  • Руководящие принципы для представления мировых данных о погоде за 2011 и последующие годы (ВМО-№ 1186, ВМО, 2021)

Updated EXCEL template for the submission of the World Weather Records 2011+ (Update of May 2023)

Updated Text file template for the submission of the World Weather Records 2011+ (Update of May 2023)

R-Instat software package including WWR functionality [English, Russian]


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