September 2025 brought a striking mix of extremes to Spain, with intense storms drenching the Mediterranean coast, yet overall being one of the warmest Septembers in over six decades.
According to Spain’s State Meteorological Agency (AEMET), the average temperature across mainland Spain in September was 19.7°C, around 0.6°C higher than the 1991–2020 average.
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Author's summary: Spain experiences one of its warmest Septembers despite dramatic storms.