A mass of polar air swept across central Spain this week, bringing Madrid its coldest August day since 1998. On Thursday, the historic El Retiro observatory recorded a maximum of just 21.4°C, 8 to 10 degrees below the average for this time of year. The State Meteorological Agency (Aemet) said the reading is the coldest August day in Madrid in the 21st century, a rare break from the prolonged heat of recent summers.
The climatology department has yet to give the data final validation, but considers it reliable. All surrounding weather stations reported similar values, confirming how unusual the event was. Miguel Ángel Pelacho, Aemet’s delegate in Madrid, noted that such temperatures are not unprecedented in the full historical record, which dates back to 1893. They are highly unusual, but, in the past two decades, when longer and hotter summers have become the norm.
Throughout the week, daytime highs in Madrid fluctuated between 21°C and 26°C, while nighttime lows fell to 14°C or lower in some areas. Residents got a rare respite from typical August heat. The sudden chill reached much of Spain’s interior as the polar air mass disrupted the usual late-summer weather pattern.
The cool spell is expected to be short-lived. Forecasts point to a steady rise in temperatures from Thursday through Sunday, with highs in Madrid climbing by around 9 degrees. The capital is forecast to reach 26°C on Friday, 30°C on Saturday and 32°C by Sunday. The return of anticyclonic conditions will bring more typical August weather, with clear skies and calm winds. Aemet does not expect to issue heat advisories in the immediate future, but warns that alerts could be necessary by the end of next week if the warming trend persists. By Thursday, highs may reach 34°C.
Elsewhere in Spain, the end of August has brought a run of weather extremes. While Madrid contended with record cold, Catalonia and the Balearic Islands recently faced severe storms and rare meteotsunamis, as detailed in reports on storm damage and emergency responses in Tarragona and Mallorca.
With September approaching and the equinox near, daylight hours are shortening and the likelihood of extreme heat is declining, though isolated hot days remain possible. The recent cold snap reflects the variability of Spain’s climate, even as long-term trends point toward warmer, longer summers. For now, Madrid residents can expect a return to more familiar late-summer conditions, while authorities monitor for further abrupt changes.
Spain’s climate has grown more volatile in recent years, with record heatwaves and unexpected cold spells disrupting established patterns. The El Retiro observatory’s climate series, which dates back more than a century, helps put these shifts in context. This week’s cold is not without precedent, but stands out against the backdrop of recent decades and reinforces the need for continued monitoring and adaptation to changing weather extremes.
