August Temperature +1.56°C relative to 1880-1920 Warmest August on record

 Daily CO2

Nov. 2, 2024 = 423.22 ppm

Nov. 2, 2023 = 418.98 ppm

September CO2

Sep. 2024 = 422.03 ppm

Sep. 2023 = 418.51 ppm

August Temperature

+1.56°C relative to 1880-1920

Warmest August on record

CO2 Records

co2 earth co2 records banner photo by peter boccia

Highest-Ever

Mauna Loa* CO2 Level

in recorded human history

(and millions of years before that) 

 Averages

NOAA MLO 

Scripps MLO 

Daily  CO2 

428.59 ppm

Apr 26 2024

NOAA Daily

428.63 ppm

Apr 26 2024

Weekly

CO2

427.94 ppm

Apr 21 -27 2024

data 

TBD**

data Monthly

CO2 426.91 ppm

Jun 2024

data

425.22 ppm**

Mar 2024

data

Yearly

CO2 418.56 ppm

2022

data 416.45 ppm

2021monthly data averaged

* Mauna Loa record includes CO2 measurments at Maunakea site in 2022-2023  

** Record high for the institution, not for CO2 measurements at Mauna Loa

Marking the latest CO2 records is not an act of celebration, but of bearing witness.  

The achievements are a sobering reminder of the chemical changes that we humans are collectively making to the atmosphere--changes with disruptive impacts that affect every living being in the biosphere. When a new record is reached, it is is marked here with an invitation for people to take notice, reflect on the transformation that is going in the wrong direction, and resolve to reverse these trends.

Reversing the trend is not something that any one person can achieve on their own. But individuals and groups can build on this CO2 Earth initiative by taking steps that help make the CO2 indicator for planetary health as ubiqutious as our stock market updates and weather reports. Consider sharing the CO2 Earth updates and records with people and groups that are part of your information-sharing circle.