September 2025 will be remembered in Spain as one of the hottest months on record. For several days, residents across the country have faced unprecedented temperatures, reaching 39–40 degrees in some provinces. The situation is especially severe in Andalusia, where cities such as Badajoz, Córdoba, and Sevilla are practically melting under the scorching sun.
The heat has not spared other regions either. In Castilla-La Mancha, Castilla y León, Madrid, and even in the north, in the Basque Country, temperatures have reached 36–37 degrees, which is considered abnormal for this time of year. In northern provinces such as Bizkaia, Gipuzkoa, and Álava, an elevated weather alert has been issued. On the Meseta Norte plateau, cities like Valladolid, Zamora, Salamanca, Ávila, and Burgos are also experiencing higher than usual temperatures.
The Canary Islands have not been left untouched: in Gran Canaria, Lanzarote, Fuerteventura, and Tenerife, thermometers have risen above 35 degrees, and in some areas the heat feels particularly intense. The situation is made worse by dust carried by winds from Africa, reducing visibility on the roads to 3 kilometers and significantly worsening air quality. Thunderstorms are possible in the mountain regions of the islands, especially in the afternoon.
The cause of such extreme weather conditions is a subtropical air mass that has moved in from the south. It has brought not only intense heat but also cloud cover and a sharp rise in temperatures. Most regions remain under clear skies; however, in the southwest of the peninsula, local thunderstorms are possible, especially in mountainous areas.
Nighttime offers little relief: in the coastal areas of the Mediterranean, the south, and the Ebro valley, temperatures do not drop below 20 degrees even at night. On the Canary Islands, nights are even hotter—up to 25 degrees—making it difficult to sleep and increasing health risks.
However, forecasters predict a sharp change by the weekend. An Atlantic front will bring rain and a significant drop in temperatures. On Saturday, rainfall is expected in Galicia, then moving into Asturias, Cantabria, and the Basque Country. Central and northern regions, including Castilla y León, La Rioja, Navarra, and Aragón, may see showers and thunderstorms, especially in mountainous areas. On Sunday, rain will reach the center of the country—Madrid, Castilla-La Mancha, Extremadura, and Andalucía—with heavy showers expected along the Mediterranean coast later in the day.
After the extreme heat, temperatures are set to plunge: while on Thursday some cities saw nearly 40 degrees, by Sunday the forecast is for just 28. In the north, temperatures will drop to 15 degrees, and in the south, highs will not exceed 26-28 degrees. In just a few days, Spain will shift from record-breaking heat to autumnal coolness.
