Climate TrendsHome › Greenhouse gases › Carbon dioxide (CO₂)
Carbon dioxide (CO₂) in 2025 (global mean)
Annual mean425.62 ppm
vs previous year+2.83 ppm
Rank of increase3 / 46
Max − min within year4.45 ppm
By month
| Month | Concentration | vs same month last year |
|---|---|---|
| Jan | 426.01 ppm | +3.81 |
| Feb | 426.46 ppm | +3.67 |
| Mar | 426.66 ppm | +3.28 |
| Apr | 427.03 ppm | +3.18 |
| May | 427.04 ppm | +3.11 |
| Jun | 425.90 ppm | +2.67 |
| Jul | 424.09 ppm | +2.48 |
| Aug | 422.86 ppm | +2.59 |
| Sep | 423.06 ppm | +2.47 |
| Oct | 424.66 ppm | +2.33 |
| Nov | 426.39 ppm | +2.32 |
| Dec | 427.31 ppm | +2.11 |
+2.37 ppm
+2.26 ppm
+2.38 ppm
+2.27 ppm
+3.44 ppm
+2.83 ppm
Bars: yearly increase in the surrounding years. NOAA GML global monthly means.