In December, the weather along the Camino Portugués Central varies greatly between different regions, influenced by coastal and inland weather patterns. In Portugal, regions such as Lisboa and Santarém often experience patchy rain, moderate temperatures, and intermittent sunny spells. The central areas around Coimbra to Porto are characterized by heavier rain showers, while Galicia, in the north of Spain, tends to have consistent rain, cloud cover, and cooler temperatures. Overall, the month sees a mix of overcast and sunny days with temperatures fluctuating, more frequent rainfall in the latter part of the month, and occasional heavy downpours, particularly in the northernmost and coastal sections of the route.
The region of Lisboa typically experiences a mix of patchy rain, sunny spells and occasional overcast days. The temperatures in December range from mild highs of 20°C to cooler lows around 7°C. Rainfall is mostly light, with occasional days of moderate rain, especially in areas like Lisboa and Vila Franca de Xira.
In Santarém and Golegã, the weather follows a similar pattern, starting with overcast skies and heavy rain, like in Golegã with 17.4 mm. The weather gradually becomes clearer with sunny days and mild temperatures ranging from 13°C to 20°C.
From Tomar through to Porto, the weather is variable. Early in the route around Tomar, moderate rain and showers are frequent, while further north, heavy rain is more common in places like Albergaria-a-Velha, receiving as much as 93.9 mm in a day. This region experiences significant rainfall but interspersed with sunny periods.
In the Norte region, which includes Barcelos, and Ponte de Lima, the weather often involves rain showers and cloudy days, with temperatures ranging from 12°C to 15°C. Heavy rain episodes are frequent here, resulting in significant daily precipitation towards the end of December.
In Galicia, on the Spanish side, towns like Tui and Santiago de Compostela are characterized by a pattern of frequent rain showers and overcast skies. With daytime highs typically below 15°C, significant rainfall occurs, like in Pontevedra, which can often exceed 30 mm daily, contributing to the area's wet reputation during this period.
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