dataClima
Dataclima is an interactive digital platform that provides access to modeled and observed climate indicators for the Portugal mainland and island regions. The modeled climate indicators are made available since 1981, for the various territorial units and aims to support the most relevant activity sectors.
October 2025 - monthly summary
October 2025 was the 2nd warmest in mainland Portugal since records began (1931) and the 3rd warmest on Earth, classified as very warm regarding air temperature and dry regarding precipitation.
For air temperature it was 2nd warmest October since 1931: mean temperature 19.00°C (+2.21°C); 4th highest mean maximum temperature: 24.57°C (+2.61°C) and the 6th highest mean minimum temperature: 13.42°C (+1.80°C). A heatwave occurred from 10 to 19 October, affecting ~60% of stations across the North, Central, and Alto Alentejo.
For precipitation, total monthly precipitation was 86.9 mm (79% of the 1991–2020 average), with high daily rainfall occurring by the end of the month, on 28–29 October (Lisbon and Algarve) and 31 October (Northen coast and Central regions).
Drought conditions eased in the North and central Portugal and worsened in the Centre-South and Southern regions.
View the modeled historical data
October 2025 - the 6th heatwave in mainland Portugal
In 2025, mainland Portugal recorded at least six heatwaves so far, characterized by exceptionally high maximum temperatures, with notably prolonged and intense episodes in late June and between July and August — the latter being the longest ever recorded in the northern and central inland regions (July 29 to August 17).
In early October, a new and unusual prolonged warm spell occurred, marking the sixth heatwave of the year, which lasted from October 10 to 19 and affected 65% of meteorological stations. The regions most impacted were Lisbon and the Tagus Valley, much of the North (Trás-os-Montes and Alto Douro), and parts of Upper and Central Alentejo. The stations of Mora, Pegões, Torres Vedras (Dois Portos), and Rio Maior recorded nine consecutive heatwave days, reflecting the exceptional persistence of this event, which occurred outside the usual period of intense heat in mainland Portugal.
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