Spain experiences a historic September: 22.4°C monthly average
Current estimates put September 2026 at about 22.4°C, the warmest on record: 3.3°C above normal and therefore warmer than an average Spanish summer.
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September 2026 is set to make weather history in Spain. Despite an expected drop in temperatures towards the end of the month, it is already virtually certain that this September will become the warmest in the historical record. With a nationwide average temperature expected to reach 22.4°C, the first month of autumn is even reaching the temperature levels of a typical Spanish summer month.
The heat is expected to remain noticeable during the final days of September. Although temperatures are forecast to fall towards the end of the month, this is unlikely to significantly change the exceptional overall monthly figures.
Based on the observations and forecasts currently available, it is virtually certain that September 2026 will go down in Spain’s weather records as the warmest September in the historical series.
The warmest September in the series so far is September 2018, which beat the previous record from 1987 by 0.1°C. September 1985 and 1990 follow behind.
However, 2026 is expected to do more than just narrowly break those old records. According to current estimates, this September could be more than 0.5°C warmer than the previous record values.
This would result in an estimated average monthly temperature of 22.4°C across Spain.
That is an impressive 3.3°C above the long-term average.
Such a significant positive temperature anomaly over an entire month highlights just how exceptional September 2026 has been.
The average temperature during Spain’s meteorological summer is around 22.1°C. With a projected average of 22.4°C, September 2026 would actually be slightly warmer.
Or, to put it another way:
Spain is effectively experiencing an extra month of summer this year.
Although the days are now noticeably shorter and astronomical autumn has begun, temperatures across large parts of the country continue to feel more like midsummer than early autumn.
If the current calculations are confirmed, September 2026 will set a new historical temperature record for Spain, with a clear margin over the previous record months.
This will bring an extraordinary weather month to a close – one that has once again demonstrated just how long summer-like temperatures can persist in Spain well into the meteorological autumn.
At meteo365.es, we will continue to monitor developments closely, particularly the expected drop in temperatures towards the end of the month. As always, you can find the latest forecasts, weather maps and weather developments for Spain here at meteo365.es.
Third exceptionally warm spell this September
September has been distinctly summery across Spain this year. The country is currently experiencing its third spell of unusually high temperatures this month.The heat is expected to remain noticeable during the final days of September. Although temperatures are forecast to fall towards the end of the month, this is unlikely to significantly change the exceptional overall monthly figures.
Based on the observations and forecasts currently available, it is virtually certain that September 2026 will go down in Spain’s weather records as the warmest September in the historical series.
The 2018 record is expected to fall
A look at the previous records makes this development particularly remarkable. Unlike many other months of the year, September is one of the months in Spain where long-term temperature records have so far shown comparatively less warming.The warmest September in the series so far is September 2018, which beat the previous record from 1987 by 0.1°C. September 1985 and 1990 follow behind.
However, 2026 is expected to do more than just narrowly break those old records. According to current estimates, this September could be more than 0.5°C warmer than the previous record values.
Average of 22.4°C – 3.3 degrees above normal
The current assessment is based on temperatures observed up to and including 22 September, together with forecast values through the end of the month.This would result in an estimated average monthly temperature of 22.4°C across Spain.
That is an impressive 3.3°C above the long-term average.
Such a significant positive temperature anomaly over an entire month highlights just how exceptional September 2026 has been.
An extra month of summer for Spain
The scale of the warmth becomes even clearer when the expected September temperature is compared with the Spanish summer.The average temperature during Spain’s meteorological summer is around 22.1°C. With a projected average of 22.4°C, September 2026 would actually be slightly warmer.
Or, to put it another way:
Spain is effectively experiencing an extra month of summer this year.
Although the days are now noticeably shorter and astronomical autumn has begun, temperatures across large parts of the country continue to feel more like midsummer than early autumn.
Cooler weather at the end of the month – but the record is still expected to stand
Temperatures are forecast to fall during the final days of September. However, the cooler conditions are likely to arrive too late to significantly alter the exceptionally warm monthly average.If the current calculations are confirmed, September 2026 will set a new historical temperature record for Spain, with a clear margin over the previous record months.
This will bring an extraordinary weather month to a close – one that has once again demonstrated just how long summer-like temperatures can persist in Spain well into the meteorological autumn.
At meteo365.es, we will continue to monitor developments closely, particularly the expected drop in temperatures towards the end of the month. As always, you can find the latest forecasts, weather maps and weather developments for Spain here at meteo365.es.
