temperature · Vietnam
Hanoi
May mean daily maximum
Modelled demonstration series · not observed data
Read this one together with the humidity tiles. In dry heat the thermometer tells you most of the story; here it tells you about half. The same reading with this much moisture in the air produces a heat index far above the measured temperature, which is why hospital admissions in the Red River delta track humidity as closely as they track heat.
75 years, modelled
Same reading, two normals
| Normal | Mean | σ | Pct | Return |
|---|---|---|---|---|
| 1951–1980 | 32.6 °C | +0.90σ | 82nd | 1 in 5.4 years |
| 1991–2020 | 33.1 °C | +0.44σ | 67th | 1 in 3.0 years |
Today would rank 21 of 76 for highest value in the modelled series. Nothing about the reading changes between rows — only the yardstick.
The season here
May sits between the dry season and the summer monsoon — hot, and humid enough that the heat index runs well above the thermometer.
Where this series comes from
MODELLED SERIES — not observed. Parameters set from published Hanoi May 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 Hanoi. 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 Hanoi on the field →