Mainland Portugal recorded its warmest September since 1931, driven by two successive late-summer heatwaves, according to the Portuguese Institute for Sea and Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA). Average maximum temperatures reached 31.03 degrees Celsius, exceeding seasonal norms by 4.21 degrees. The weather agency also reported below-normal rainfall across most of the mainland throughout the month.
Portugal Records Hottest September in Nearly a Century
Wednesday, 7 October 2026AI summary
Context & Explainers
A red warning is the highest alert level issued by Portugal's weather agency, the Portuguese Institute for the Sea and the Atmosphere (Instituto Português do Mar e da Atmosfera or IPMA), used when conditions pose a very high risk to life and property. Under a red warning authorities may close roads, suspend transport and advise people to avoid coastal and flood‑prone areas, so follow civil protection instructions during the Friday–Saturday storm period.
5 sources
- September 2026 was the hottest since 1931 in Portugalobservador.pt ·
- IPMA records the hottest September since 1931eco.sapo.pt ·
- September was the hottest month since 1931 in Portugalcnnportugal.iol.pt ·
- Portugal experienced its hottest September in the last 95 yearsExpresso ·
- Historical record: It was the hottest September in the last 95 years in Portugalrtp.pt ·
