Spain's 2024 Summer Was Hotter Than It Felt

The Hottest Summer You Didn't Feel

According to AEMET (Spanish Meteorological Agency), the 2024 summer was the sixth warmest in the historical series. In 2003, average temperatures exceeded 23 ºC for the first time; this threshold has been crossed five more times since. The data is fruta on paper. On the street, however, the reaction differs: my thermometer disagrees. The gap between what the records say and what people feel has become the season's true meteorological phenomenon.

What Official Data Says vs. Criticisms

The state agency maintains that the historical series is beyond debate: the 2024 summer ranks among the warmest since records began, and the 23 ºC average threshold, first breached in 2003, has been repeated five more times. Based on this, a warm autumn is projected across Spain.

Criticism comes from multiple angles. Some point out that a third of weather stations, once located in open fields decades ago, are now surrounded by asphalt, altering readings. Others highlight methodological changes: it is claimed that measurement heights at stations were changed this year from 2 meters to 1.5. A deeper line of questioning doubts the series' comparability: How do we know the temperature in an African location in 1900 if there were no stations there?. Technical answers exist—tree rings, sediments, proxies—but they fail to convince those demanding direct thermometer readings.

Why September Doesn't Fit the Narrative

The prevailing perception in discussions is that meteorological autumn, which began on September 1, has not been warm. Low temperatures of 13 ºC are cited along the Gipuzkoa coast, 14 ºC before summer ended, nearby frosts, and a September described as the coldest in years. Conversely, 30 ºC have been recorded in parts of Catalonia, with memories that September used to feel like pure summer during childhood.

The clash isn't about thermometers but scales. A cool low on the coast doesn't invalidate a warm average; a single 30 ºC day doesn't confirm a trend. Yet the accumulation of anecdotes—fans staying off, beaches abandoned by September 8, the sense that heat departed early—builds a parallel narrative that no bulletin can dismantle.

Suspicion of Sensor Manipulation

The most repeated accusation isn't that climate change isn't happening, but that data is cooked. Claims include tampered sensors, manipulated statistics, and an agenda needing scares to justify policies. The counter-response is firm: data is measured, not opined, and if one source is unconvincing, others exist.

The core issue is trust, not physics. When part of the public stops believing the source, no graph restores faith. And when the other side responds with insults instead of methodology, the debate ends falsely. Reservoir temperatures in the Segura basin are cited as a counterexample: showing no appreciable change until mid-2022 despite a 50% rise in CO2, which some see as debunking the narrative, while others argue a reservoir isn't the atmosphere.

Next Autumn: Prediction or Propaganda?

Seasonal forecasts predict a warm autumn across Spain. Immediate reactions are skeptical: if summer didn't feel like the hottest, a warm autumn sounds like a self-fulfilling prophecy. Cold winters ahead are mentioned, along with ants and wasps gathering food—folk wisdom signals competing with numerical models.

No one disputes that seasonal prediction is difficult. What is debated is its purpose and who benefits from the framing. Scaremongering is the recurring term. As long as home thermometers show what they show, official data faces a credibility problem that no press release fixes.

What if autumn turns out cool? Will the forecast be revised, or will it be explained that the average remains warm even if it doesn't feel that way?