Summer is reluctant to leave Madrid, and jackets will have to wait a little longer in the closets. With just a few days to go before the official start of fall, the region has once again issued a yellow alert for high temperatures ahead of a day when thermometers could reach 37 ºC in various parts of the Community of Madrid. The forecast from the State Meteorological Agency predicts the highest temperatures in the Metropolitan Area and Henares, where the heat is expected to intensify, especially during the midday and late afternoon hours.
The situation contrasts with the calendar: astronomical fall begins on September 23, but this heatwave feels more like the height of summer. Partly cloudy or clear skies, plenty of sunshine, and high temperatureswill characterize the day in Madrid, with highs around 35 ºC in the capital and temperatures that could reach 37 ºC in municipalities in the eastern and southern parts of the Community.
Highs of 37 ºC in the region

The yellow alert affects the Metropolitan Area and Henares, where AEMET forecasts maximum temperatures of up to 37 ºC. The meteorological agency classifies this level as a low risk for the general population, although it notes that the heat may affect specific activities and the most vulnerable people.
Alcalá de Henares is among the municipalities where the highest temperatures are expected, with highs nearing 37 °C. Similar temperatures could also be reached in the southern Jarama region and the Vega de Aranjuez. In the city of Madrid, the forecast high is around 35 °C, while in areas such as Getafe and Navalcarnero, temperatures are expected to reach around 36 °C.
The Sierra de Madrid is not spared from the heat either. Although temperatures may be slightly lower than in the hottest parts of the metropolitan area, highs will exceed 30 ºC in some places. This is a significant departure from typical mid-September conditions, when the drop in temperatures begins to be more noticeable, especially in the late afternoon and at night.
Temperatures will drop by midweek
The forecast indicates that this heat wave will be short-lived. Starting Wednesday, a significant drop in temperatures is expected, particularly in the Sierra and the metropolitan area, following a day of unusually high highs for the second half of September.
The change will bring weather more in line with this time of year, although specific conditions may vary depending on the area within the Community. After several spells of intense heat throughout September, the drop in temperature will be welcomed by those already looking forward to cooler nights and less stifling afternoons.
Until then, Madrid will experience one last summer heat wave before fall. The main recommendation is simple: if possible, reschedule outdoor plans for early morning or late afternoon, bring water, seek shade, and check the latest weather advisories before leaving home.