The world’s fastest warming cities, visualized. Africa and Central Asia are heating up at alarming rates. [OC]

I analyzed 30 years of temperature data for 259 cities. These are the 15 fastest warming places.

Data source: Open-Meteo Historical Weather API (ERA5 Reanalysis)

Methodology:

– Linear regression analysis of daily temperature data (1995-2025)

– Each city: ~11,000 daily records over 30 years

– Warming rate = slope of annual average temperatures × 10 (per decade)

Key findings:

– 🔥 Marrakech, Morocco leads at +1.45°C/decade – nearly 4x the global average

– Central Asia (Kazakhstan, Uzbekistan, Armenia) shows extreme warming

– Alpine regions in Europe (Switzerland, Austria) warming faster than lowlands

– Global average across 259 cities: +0.40°C/decade

Continents ranked by warming rate:

1. Africa: +0.56°C/decade

2. Europe: +0.52°C/decade

3. Asia: +0.36°C/decade

4. Americas: +0.28°C/decade

5. Oceania: +0.21°C/decade

More city-level climate data: 30yearweather.com