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Spain records one of the warmest Septembers since 1961 despite dramatic storms
September brought record-breaking heat to parts of Andalucia and Murcia with temperatures 2°C above normal
Average temperature anomalies in September 2025 compared to the period 1991-2020
We might still be drying out or rain coats and shoes after a powerful DANA battered much of Alicante and Murcia last weekend, but this was certainly a storm out of the blue after an otherwise mild and pleasant start to autumn. In fact, it turns out the September 2025 was much warmer and drier than usual.
This is a trend we’ve come to expect alongside global warming. The previous month, August, was the hottest month of all time and it doesn’t stand alone, as month after month Spain has been breaking records for heat and a distinct lack of the wet stuff.
The State Meteorological Agency (AEMET) has just released its climate forecast for September 2025 and the numbers paint an interesting picture. Overall, it was a warm month with an average temperature across mainland Spain of 19.7°C, sitting 0.6°C higher than what we'd normally expect.
That makes it the twenty-third warmest September since records began in 1961 and the tenth warmest of this century alone.
The temperature story varied quite a bit depending on where you were. Western Galicia in the north actually saw temperatures around 1°C below normal, while the rest of Galicia, Asturias, Cantabria, the Basque Country, Castilla y León and Extremadura all experienced fairly typical September weather.
But head to much of Andalucia and parts of Castilla-La Mancha, the Valencian Community and Murcia, and you'd have felt temperatures roughly 2°C above normal. The rest of the country sat somewhere in between, around 1°C warmer than average.
Some places absolutely sweltered. Gran Canaria airport recorded a scorching 39.9°C on September 19, while Córdoba and Granada airports both saw 39.1°C on the 18th and 17th, respectively. Jerez de la Frontera airport hit 39.0°C on the September 12.
In fact, four major weather stations recorded their highest ever September temperatures since their records began.
On the flip side, some spots got properly chilly at night. Molina de Aragón dropped to -1.4°C on the 24th, Puerto de Navacerrada saw -1.0°C on the 22nd and Burgos Airport recorded -0.7°C on September 26.
When it comes to rainfall, September was decidedly stingy across most of the country. Spain only saw an average of 25.4 mm of rain, which works out to just 57% of what's considered normal for the month. That makes it the twelfth driest September on record since 1961 and the fourth driest of this century.
Percentage of precipitation relative to the 1991-2020 average in September 2025
Large swathes of the central and southwestern parts of the country were particularly parched, with some areas of Castilla-La Mancha, La Rioja and Navarra experiencing extremely dry conditions. Much of the interior and the northwest weren't much better off.
However, the Mediterranean coast told a completely different story. Catalonia, the Valencian Community and the Balearic Islands went from wet to very wet, thanks almost entirely to those torrential downpours that arrived in the final days of the month.
Those end-of-month storms really made their mark. Ibiza airport took the prize with 101.1 mm falling on the 30th alone, followed by Valencia with 96.8 mm on the 29th, Tortosa with 72.8 mm on the 28th and Alicante-Elche airport with 69.3 mm on the 29th. Valencia airport saw 63.0 mm on the September 28 and Alcantarilla airbase recorded 60.6 mm on the 29th.
So while October’s DANA might have felt like it came from nowhere, the reality is that September was remarkably dry until those final dramatic days.
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Images: Aemet
