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.
December 2025 - monthly summary
The summary of December 2025 climatological bulletin for mainland Portugal has been published. This is a preliminary version based on the data currently available, with the final document to be published in the middle of the month.
December 2025 was classified as wetter-than-average.
Air temperature
The month was classified as normal, with an average air temperature of 19.93 °C, +0.19 °C above the normal value for 1991-2020. The average maximum air temperature was 13.83 °C (an anomaly of -0.08 °C from normal) and the average minimum air temperature was 6.04 °C (an anomaly of +0.45 °C from normal).
Precipitation
Total precipitation was above normal, corresponding to about 137% of the average value for the period 1991-2020. Thus, December 2025 was classified as wetter than average, being the 7th rainiest December since 2000. The wettest December ever was in 1978, with 399.7mm of average total precipitation.
Note the end of the meteorological drought in the country, as well as a cold spell in the last days of the month, marked by snowfall in several locations in the North and Central regions (between the Decemebr 21 and 24). On the 26th, 45% of weather stations recorded negative minimum air temperatures.
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.
Discover Our Partners
