November 2024 was the 2nd warmest month on record (after November 2023) and the warmest in mainland Portugal.
Global overview
The month recorded a global mean temperature of 14.10 °C, 0.70 °C above the 1991–2020 mean (Fig. 1). The month is estimated to have been about 1.62 °C warmer than the 1850–1900 pre-industrial average, and is the 16th month in a 17-month period in which the global mean surface air temperature exceeded 1.5 °C.
In Portugal
November 2024 was classified as extremely hot in terms of air temperature and dry in terms of precipitation
It was the warmest November in the last 94 years; the mean value of the average air temperature, 15.14 °C, presents an anomaly of + 2.69 °C in relation to the 1981-2010 normal value.
The mean value of the maximum air temperature, 19.29 °C, was the 4th highest value since 1931, with a positive anomaly of 2.50 °C in relation to the mean value.
The average minimum air temperature, 10.99 °C, was 2.89 °C higher than normal, being the 3rd highest value since 1931 and the 2nd highest since 2000.
During the month, air temperature values were almost always above the monthly average value, with 6 October standing out when 20% of the meteorological stations in the IPMA network recorded maximum temperature values above 25 °C. On 6 November, the highest value of the month was recorded, 27.9 °C, at the Alcácer do Sal meteorological station.
Regarding precipitation, in November, the total monthly precipitation, 67.1 mm, was lower than the average value for 1981-2010 (-50.3 mm).
During the month of November, the most significant precipitation occurred on the 1st, 4/5, 14 to 16 and 24/25.
The period from the 14th to the 16th stands out with the occurrence of heavy to very heavy rainfall and the occurrence of thunderstorms, especially in the South region on the 15th, where the inland region of Baixo Alentejo and the Algarve leeward region stand out, with some locations experiencing flooding. (See bottom right chart)
There was a decrease in the area in meteorological drought in the South region, limited to the southern coastal region between Sines and Portimão. At the end of November, only 8% of the territory was in meteorological drought (weak drought class).