Each month, as soon as the month’s global temperature is published (about ten days after its end), the Observatory issues the state of the system: the month’s measurements compared with the 1991–2020 normal and ranked in their record, the active links (a driver far from its normal and a link confirmed by the correspondences), the forecasts and their verification, the state of the registered hypotheses. Each bulletin is frozen when issued and sealed in the log. Atom feed
- Global temperature ranked 2 of 147 for this month of the year since 1880, +0.80 °C against 1991–2020.
- very strong El Niño: Niño 3.4 at +2.09 °C. Record value for this month of the year since 1950.
- Arctic Oscillation (AO): ranked 2 of the highest values for this month out of 77 (since 1950).
- North Atlantic (AMO): ranked 2 of the highest values for this month out of 127 (since 1900).
- Antarctic sea ice (extent): ranked 3 of the lowest values for this month out of 40 (since 1987).
- 1 geomagnetic storm day (normal 4.8, largest Kp 5.0).
- Largest earthquake: M 6.7, 74 km ENE of Tadine, New Caledonia, on 2026-09-25; 6 M ≥ 6 earthquakes in the month (normal 13).
All bulletins
- September 2026 · issued on 2026-10-26