Madrid is under a yellow alert as the Aemet warns of strong storms and possible hail. After an unusually warm September, autumn weather has finally arrived, bringing rain, cooler air, and a shift in daily routines across the region.
Storms are on the move. The Agencia Estatal de Meteorología (Aemet) has put all of Madrid under a yellow alert. Intense rain and hail could hit at any time. This is a sharp break from the heat that lingered through September. That month was marked as "extremely warm," with maximum temperatures up to 5.1 degrees above normal. The Meteoalerta plan treats a yellow alert as a real-time warning for dangerous weather in the next 72 hours. Aemet updates it as conditions change.
The warning stretches from the city center to the Sierra, and covers the south, vegas, west, and Henares. It starts at 16:00 on Tuesday. Early in the day, showers will be light and scattered. By afternoon, storms will pick up and spread. Hail is possible. Aemet will track rainfall, hail, and temperature swings with official hourly data. Residents can check these numbers after the front passes.
The summer of 2026 was the hottest in Spain in at least 150 years, with 61 days of heatwave recorded between June 20 and September 7.
Clouds rolled in over the weekend. Rain fell in patches. The air turned cooler and damp. For many, it finally felt like autumn. This change came after weeks of heat that stretched far past the official start of the season. Aemet spokesperson Rubén del Campo said the warmth began in mid-May and lasted through most of September. This year’s shift stands out.
Rain will stick around on Wednesday. Showers should fade by late afternoon, but skies will stay unsettled. Fog is likely in the Sierra, especially in the morning and evening. That could make travel harder. Aemet’s forecast for October 5–11 says most of Spain will see temperatures return to normal. The northeast, Mediterranean coast, and Balearic Islands may still run warm.
Temperatures are dropping. Minimums will hold steady on Tuesday, but highs will fall across the region. Nights will feel colder. The trend will continue through the week. Collado Villalba could see lows of 7 degrees on Thursday. Madrid city expects minimums of 10 and highs of 20.
Seasonal projections from Aemet suggest a high probability that October to December 2026 will rank in the warmest third of the climate distribution for Spain as a whole. This means that even sharp cold snaps and stormy episodes do not necessarily signal a lasting onset of cold weather.
Autumn weather warnings are nothing new in Spain. But this year’s sudden change is hard to ignore. Just days ago, Madrid baked in summer heat. Now, people face downpours and hail that could disrupt commutes and outdoor plans. This pattern matches what happened recently in Catalonia, as reported earlier, where flash floods and late alerts caught cities off guard.
Madrid’s yellow alert shows how fast the weather can flip, especially after months of extremes. Aemet’s early warnings give people time to get ready. Still, autumn storms are unpredictable. The city’s response will be tested as the week goes on. Timely updates and local readiness matter more than ever.
