How green is Siena?

Siena has 911 square metres of green space per inhabitant in 2025 satellite data. Vegetation covers 41% of the city area. In summer, the hottest land surface zones sit 3.2 °C above the city-wide average (land surface temperature, not air temperature). The PM2.5 model estimate for 2025 is 10.0 µg/m³. Satellite records cover 8 years, 2018 to 2025. Overall, Siena ranks #217 of 828 reviewed cities in the Green City Index (green space, land surface heat and air quality combined), and #4 of 115 in Italy.

911
m² green per inhabitant
41%
vegetation cover
+3.2 °C
hottest zones vs city mean
10.0
PM2.5 estimate µg/m³
16.9
PM10 estimate µg/m³
21.8
NO2 estimate µg/m³
333.0
Index · #217/828
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City maps

Satellite — Siena Satellite Green cover — Siena Green cover Detected green vegetation Heat — Siena Heat cooler hotter NO2 — Siena NO2 lower higher µg/m³ PM2.5 — Siena PM2.5 lower higher µg/m³ PM10 — Siena PM10 lower higher µg/m³

Nearby in the rankings

This city is at position #217 of 828 worldwide.

#rank City Country Index
214 Elche Spain 332.2
215 Koblenz Germany 332.2
216 Spijkenisse Netherlands 332.7
217 Siena Italy 333.0
218 Daugavpils Latvia 333.3
219 Šiauliai Lithuania 335.2
220 Liepāja Latvia 335.3

Method and caveats

Heat is land surface temperature, not air temperature. Air quality values are model estimates. Green area is vegetation extent detected by satellite, not tree height.