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WORLD STATISTICS

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This series is published for the world only.

Global mean atmospheric CO₂ (monthly)

parts per million (dry air mole fraction) · NOAA Global Monitoring Laboratory, marine surface sites via NOAA Global Monitoring Laboratory

Data table

439 observations

PeriodWorld
July 2026426.10 ppm
June 2026427.79 ppm
May 2026428.62 ppm
April 2026428.68 ppm
March 2026428.50 ppm
February 2026428.45 ppm
January 2026428.02 ppm
December 2025427.31 ppm
November 2025426.38 ppm
October 2025424.66 ppm
September 2025423.06 ppm
August 2025422.86 ppm
July 2025424.09 ppm
June 2025425.90 ppm
May 2025427.04 ppm
April 2025427.03 ppm
March 2025426.66 ppm
February 2025426.46 ppm
January 2025426.01 ppm
December 2024425.20 ppm
November 2024424.07 ppm
October 2024422.33 ppm
September 2024420.58 ppm
August 2024420.27 ppm
July 2024421.61 ppm
June 2024423.23 ppm
May 2024423.93 ppm
April 2024423.85 ppm
March 2024423.38 ppm
February 2024422.79 ppm
January 2024422.20 ppm
December 2023421.50 ppm
November 2023420.40 ppm
October 2023418.84 ppm
September 2023417.17 ppm
August 2023416.78 ppm
July 2023417.92 ppm
June 2023419.56 ppm
May 2023420.54 ppm
April 2023420.48 ppm
March 2023419.98 ppm
February 2023419.65 ppm
January 2023419.37 ppm
December 2022418.91 ppm
November 2022417.84 ppm
October 2022416.13 ppm
September 2022414.62 ppm
August 2022414.40 ppm
July 2022415.67 ppm
June 2022417.43 ppm
May 2022418.45 ppm
April 2022418.58 ppm
March 2022418.16 ppm
February 2022417.64 ppm
January 2022417.18 ppm
December 2021416.60 ppm
November 2021415.58 ppm
October 2021413.83 ppm
September 2021412.38 ppm
August 2021412.15 ppm
July 2021413.45 ppm
June 2021415.20 ppm
May 2021416.01 ppm
April 2021415.81 ppm
March 2021415.49 ppm
February 2021415.20 ppm
January 2021414.73 ppm
December 2020414.14 ppm
November 2020413.25 ppm
October 2020411.66 ppm
September 2020410.00 ppm
August 2020409.74 ppm
July 2020411.17 ppm
June 2020412.88 ppm
May 2020413.81 ppm
April 2020413.86 ppm
March 2020413.44 ppm
February 2020412.97 ppm
January 2020412.44 ppm
December 2019411.76 ppm
November 2019410.88 ppm
October 2019409.44 ppm
September 2019407.92 ppm
August 2019407.65 ppm
July 2019408.88 ppm
June 2019410.53 ppm
May 2019411.34 ppm
April 2019411.33 ppm
March 2019410.89 ppm
February 2019410.34 ppm
January 2019409.92 ppm
December 2018409.19 ppm
November 2018408.13 ppm
October 2018406.65 ppm
September 2018405.18 ppm
August 2018405.11 ppm
July 2018406.49 ppm
June 2018408.06 ppm
May 2018408.94 ppm
April 2018409.07 ppm
March 2018408.77 ppm
February 2018408.23 ppm
January 2018407.53 ppm
December 2017406.75 ppm
November 2017405.70 ppm
October 2017404.16 ppm
September 2017402.66 ppm
August 2017402.57 ppm
July 2017404.11 ppm
June 2017405.85 ppm
May 2017406.64 ppm
April 2017406.60 ppm
March 2017406.32 ppm
February 2017405.91 ppm
January 2017405.33 ppm
December 2016404.67 ppm
November 2016403.76 ppm
October 2016402.41 ppm
September 2016400.96 ppm
August 2016400.78 ppm
July 2016402.10 ppm
June 2016403.62 ppm
May 2016404.40 ppm
April 2016404.36 ppm
March 2016403.85 ppm
February 2016403.26 ppm
January 2016402.62 ppm
December 2015401.66 ppm
November 2015400.36 ppm
October 2015398.80 ppm
September 2015397.34 ppm
August 2015397.07 ppm
July 2015398.38 ppm
June 2015400.06 ppm
May 2015400.91 ppm
April 2015400.96 ppm
March 2015400.57 ppm
February 2015400.12 ppm
January 2015399.56 ppm
December 2014398.83 ppm
November 2014397.86 ppm
October 2014396.38 ppm
September 2014395.12 ppm
August 2014395.02 ppm
July 2014396.13 ppm
June 2014397.72 ppm
May 2014398.69 ppm
April 2014398.63 ppm
March 2014398.27 ppm
February 2014397.97 ppm
January 2014397.51 ppm
December 2013396.87 ppm
November 2013395.96 ppm
October 2013394.50 ppm
September 2013393.21 ppm
August 2013393.24 ppm
July 2013394.48 ppm
June 2013395.96 ppm
May 2013396.75 ppm
April 2013396.74 ppm
March 2013396.28 ppm
February 2013395.69 ppm
January 2013395.07 ppm
December 2012394.39 ppm
November 2012393.56 ppm
October 2012392.16 ppm
September 2012390.55 ppm
August 2012389.89 ppm
July 2012391.00 ppm
June 2012392.84 ppm
May 2012393.88 ppm
April 2012393.99 ppm
March 2012393.72 ppm
February 2012393.20 ppm
January 2012392.61 ppm
December 2011392.04 ppm
November 2011391.21 ppm
October 2011389.83 ppm
September 2011388.26 ppm
August 2011387.86 ppm
July 2011389.19 ppm
June 2011391.13 ppm
May 2011392.07 ppm
April 2011392.05 ppm
March 2011391.66 ppm
February 2011391.29 ppm
January 2011390.85 ppm
December 2010390.34 ppm
November 2010389.62 ppm
October 2010388.25 ppm
September 2010386.70 ppm
August 2010386.23 ppm
July 2010387.35 ppm
June 2010389.01 ppm
May 2010389.95 ppm
April 2010389.98 ppm
March 2010389.68 ppm
February 2010389.33 ppm
January 2010388.62 ppm
December 2009387.84 ppm
November 2009386.94 ppm
October 2009385.49 ppm
September 2009383.93 ppm
August 2009383.63 ppm
July 2009385.01 ppm
June 2009386.96 ppm
May 2009387.95 ppm
April 2009387.99 ppm
March 2009387.71 ppm
February 2009387.48 ppm
January 2009387.03 ppm
December 2008386.27 ppm
November 2008385.18 ppm
October 2008383.67 ppm
September 2008382.54 ppm
August 2008382.77 ppm
July 2008384.10 ppm
June 2008385.58 ppm
May 2008386.49 ppm
April 2008386.53 ppm
March 2008386.15 ppm
February 2008385.74 ppm
January 2008385.23 ppm
December 2007384.46 ppm
November 2007383.45 ppm
October 2007382.10 ppm
September 2007380.69 ppm
August 2007380.30 ppm
July 2007381.55 ppm
June 2007383.26 ppm
May 2007384.12 ppm
April 2007384.27 ppm
March 2007384.01 ppm
February 2007383.54 ppm
January 2007383.03 ppm
December 2006382.39 ppm
November 2006381.44 ppm
October 2006380.08 ppm
September 2006378.63 ppm
August 2006378.49 ppm
July 2006380.07 ppm
June 2006381.76 ppm
May 2006382.63 ppm
April 2006382.68 ppm
March 2006382.34 ppm
February 2006381.95 ppm
January 2006381.33 ppm
December 2005380.52 ppm
November 2005379.53 ppm
October 2005378.07 ppm
September 2005376.76 ppm
August 2005376.73 ppm
July 2005377.94 ppm
June 2005379.60 ppm
May 2005380.42 ppm
April 2005380.32 ppm
March 2005379.87 ppm
February 2005379.27 ppm
January 2005378.73 ppm
December 2004378.17 ppm
November 2004377.20 ppm
October 2004375.73 ppm
September 2004374.39 ppm
August 2004374.49 ppm
July 2004375.96 ppm
June 2004377.51 ppm
May 2004378.40 ppm
April 2004378.47 ppm
March 2004378.16 ppm
February 2004377.73 ppm
January 2004377.21 ppm
December 2003376.52 ppm
November 2003375.66 ppm
October 2003374.36 ppm
September 2003373.09 ppm
August 2003372.93 ppm
July 2003374.16 ppm
June 2003375.71 ppm
May 2003376.54 ppm
April 2003376.39 ppm
March 2003375.91 ppm
February 2003375.47 ppm
January 2003374.94 ppm
December 2002374.26 ppm
November 2002373.28 ppm
October 2002371.95 ppm
September 2002370.67 ppm
August 2002370.35 ppm
July 2002371.41 ppm
June 2002372.84 ppm
May 2002373.71 ppm
April 2002373.73 ppm
March 2002373.38 ppm
February 2002372.91 ppm
January 2002372.51 ppm
December 2001371.97 ppm
November 2001371.05 ppm
October 2001369.71 ppm
September 2001368.36 ppm
August 2001368.32 ppm
July 2001369.45 ppm
June 2001370.81 ppm
May 2001371.76 ppm
April 2001371.90 ppm
March 2001371.59 ppm
February 2001371.18 ppm
January 2001370.69 ppm
December 2000370.10 ppm
November 2000369.28 ppm
October 2000367.91 ppm
September 2000366.71 ppm
August 2000366.76 ppm
July 2000367.91 ppm
June 2000369.31 ppm
May 2000370.24 ppm
April 2000370.35 ppm
March 2000369.97 ppm
February 2000369.65 ppm
January 2000369.39 ppm
December 1999368.88 ppm
November 1999368.04 ppm
October 1999366.75 ppm
September 1999365.45 ppm
August 1999365.33 ppm
July 1999366.69 ppm
June 1999368.36 ppm
May 1999369.21 ppm
April 1999369.29 ppm
March 1999368.90 ppm
February 1999368.51 ppm
January 1999368.11 ppm
December 1998367.47 ppm
November 1998366.60 ppm
October 1998365.34 ppm
September 1998364.03 ppm
August 1998363.79 ppm
July 1998364.83 ppm
June 1998366.26 ppm
May 1998366.86 ppm
April 1998366.58 ppm
March 1998365.93 ppm
February 1998365.47 ppm
January 1998365.19 ppm
December 1997364.68 ppm
November 1997363.61 ppm
October 1997361.93 ppm
September 1997360.40 ppm
August 1997360.40 ppm
July 1997361.93 ppm
June 1997363.58 ppm
May 1997364.50 ppm
April 1997364.50 ppm
March 1997364.02 ppm
February 1997363.63 ppm
January 1997363.26 ppm
December 1996362.63 ppm
November 1996361.78 ppm
October 1996360.67 ppm
September 1996359.70 ppm
August 1996360.07 ppm
July 1996361.57 ppm
June 1996362.88 ppm
May 1996363.29 ppm
April 1996363.14 ppm
March 1996362.82 ppm
February 1996362.50 ppm
January 1996362.14 ppm
December 1995361.65 ppm
November 1995360.77 ppm
October 1995359.43 ppm
September 1995358.06 ppm
August 1995357.74 ppm
July 1995359.00 ppm
June 1995360.62 ppm
May 1995361.47 ppm
April 1995361.55 ppm
March 1995361.08 ppm
February 1995360.62 ppm
January 1995360.13 ppm
December 1994359.54 ppm
November 1994358.69 ppm
October 1994357.27 ppm
September 1994356.02 ppm
August 1994356.06 ppm
July 1994357.27 ppm
June 1994358.80 ppm
May 1994359.74 ppm
April 1994359.71 ppm
March 1994359.36 ppm
February 1994359.00 ppm
January 1994358.48 ppm
December 1993357.86 ppm
November 1993356.96 ppm
October 1993355.71 ppm
September 1993354.48 ppm
August 1993354.45 ppm
July 1993355.73 ppm
June 1993357.35 ppm
May 1993358.38 ppm
April 1993358.43 ppm
March 1993357.96 ppm
February 1993357.55 ppm
January 1993357.21 ppm
December 1992356.74 ppm
November 1992355.99 ppm
October 1992354.81 ppm
September 1992353.58 ppm
August 1992353.66 ppm
July 1992355.18 ppm
June 1992356.87 ppm
May 1992357.83 ppm
April 1992357.76 ppm
March 1992357.26 ppm
February 1992356.89 ppm
January 1992356.54 ppm
December 1991355.95 ppm
November 1991355.16 ppm
October 1991354.01 ppm
September 1991352.93 ppm
August 1991353.06 ppm
July 1991354.53 ppm
June 1991356.18 ppm
May 1991357.11 ppm
April 1991357.19 ppm
March 1991356.69 ppm
February 1991356.19 ppm
January 1991355.76 ppm
December 1990355.19 ppm
November 1990354.45 ppm
October 1990353.19 ppm
September 1990351.79 ppm
August 1990351.58 ppm
July 1990352.70 ppm
June 1990354.32 ppm
May 1990355.41 ppm
April 1990355.51 ppm
March 1990355.20 ppm
February 1990354.88 ppm
January 1990354.48 ppm