temperature · Brazil
Manaus, Amazonas
September mean daily maximum
Modelled demonstration series · not observed data
Rainforest temperature is normally held down by the forest itself — trees pump enormous volumes of water into the air, and evaporation does the cooling. A departure this large is evidence of that mechanism weakening. It is one of the few readings on this wall where the anomaly is partly a symptom of what the anomaly is doing.
75 years, modelled
Same reading, two normals
| Normal | Mean | σ | Pct | Return |
|---|---|---|---|---|
| 1951–1980 | 32.6 °C | +3.90σ | 99.995th | 1 in 21,000 years |
| 1991–2020 | 33.9 °C | +2.21σ | 99th | 1 in 73 years |
Today would rank 3 of 76 for highest value in the modelled series. Nothing about the reading changes between rows — only the yardstick.
The season here
September is the end of the dry season. Heat and drought reinforce each other here: less forest moisture returned to the air means hotter, drier days.
Where this series comes from
MODELLED SERIES — not observed. Parameters set from published Manaus September climatology. The 75 annual values are synthesised by the seeded generator.
Every number on this page comes from a modelled series: 75 annual values synthesised by a seeded generator from published climatological parameters for Manaus, Amazonas. It shows how anomaly reasoning works. It is not a measurement and must not be cited as one.
How to read σ
σ counts standard deviations from this place's own normal. The sigma guide · return periods.
More temperature stations
Open Manaus on the field →