Santiago de Compostela has a mild Atlantic climate, making it a year-round destination, though weather conditions vary significantly by month. Winters from December to February are cool and wet, with average daytime temperatures around 10–12°C and frequent rainfall. These months are quieter but require warm, waterproof clothing.
 

Spring, from March to May, brings gradually rising temperatures between 14–18°C, longer daylight hours, and a mix of sunshine and showers. This season is popular with pilgrims seeking mild walking conditions and fewer crowds.
 

Summer months, especially June to August, offer the best weather in Santiago de Compostela. Temperatures range from 21–25°C, rainfall is lower, and days are long and pleasant, making this the peak season for Camino arrivals. September and October provide warm early autumn weather with fewer pilgrims, though rain increases. November marks a return to cooler, wetter conditions, signaling the start of the off-season.

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Here’s a month-by-month weather guide for Santiago de Compostela, Spain, showing what you can expect throughout the year — perfect for planning your visit or Camino arrival:

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January – Cool and wet with average highs ~10–11°C and lows ~4–5°C. Frequent rain and high humidity make winter brisk. (Weather Atlas)
February – Similar to January, chilly with moderate rainfall and average highs ~11–12°C. (Weather Atlas)
March – Temperatures begin to rise slightly (highs ~14°C), but rain is still common. (Weather Atlas)
April – Mild spring weather with highs ~15–16°C, occasional showers, and more daylight. (Weather Atlas)
May – Pleasant and warmer (highs ~17–18°C), less rain than early spring. (Weather Atlas)
June – Summer arrives with comfortable temperatures ~21°C highs and fewer rainy days. (Weather Atlas)
July – Warm and drier, with highs around 23–24°C, lowest rainfall of the year. (Weather Atlas)
August – Warmest month (max ~24–25°C), pleasant evenings and low humidity. (Weather Atlas)
September – Mild and enjoyable (highs ~22–23°C) with slightly more rain than summer. (Climate Data)
October – Cooler autumn weather (~18–19°C) with increased rainfall and cloudier days. (Climate Data)
November – Cooler and one of the rainiest months, with highs ~13°C and frequent showers. (Climate Data)
December – Cool and wet with highs ~11–12°C; short daylight and brisk conditions. (Climate Data)

Santiago’s climate features mild summers and cool, rainy winters, and precipitation can occur year-round, with the driest conditions typically in July and August. (Weather Atlas)