Camino de Santiago is region in Galicia. Galicia is an autonomous region in northwest Spain that is located on the Atlantic coastline meaning that the climate is different from that of many other popular Spanish tourist destinations. This is due to the cooling effects of the Atlantic Ocean. The presence of the Atlantic Ocean makes the region more susceptible to rain due to the mountainous area and sea water which condenses often due to the heat that drafts across from the inner most regions of Spain. The region experiences relatively mild and rainy winters and quite sunny summers with temperatures generally lower than found in other parts of Spain.
Due to its location north, western location the region of Camino de Santiago experiences a varied climate. January and December are the winter season for the region. Their winters are cold. In 2008 there were snow blizzards not only in Camino de Santiago but also across Europe. The snow however in Santiago brought the worst winter for the area in 15 years. People do not usually plan to pilgrim during this season due to the hills getting snow often compared to the lower laying areas.
October, February and March are the much wetter months than the year with an average precipitation of 155 mm per month. Rain gear is essential for pilgrims ready to brave the wet and wild weather. It is usually cold during these times too however when nature favors the oil grips the sun comes out and melts the snow. Even though these three specific months have been singled out it has been known to randomly rain heavily in Santiago. Sometimes the rain bursts from the clods in in September which is the warmer period. April is very changeable month, especially it being the last month of spring. In 2012, it rained for most of the month and flash floods ravaged the areas. April does bring very pleasant days that are warm enough but not too hot for walking. In addition, the perfect temperature in combustion with the rain brings a wonderful scene of floral meadows to the region.
The typical summer months of April, May, June and September (with an exception) are the best months to conduct an excursion on any path of the Caminos to Santiago. The weather is generally warm or hot, everything is open and fully functioning, and the routes are not as busy as the main summer months. Although the weather is favorable in this mentioned months July and August calls for the peak of the season. Festivals are rife, and the area becomes very congested with pilgrims and tourists. Many travels for the Feast of St James which is also known as Roncesvalles on the 25th of July. This time is usually avoided by pilgrims as accommodation is more expensive and gets fully booked quite fast. In addition, the 15th August is a public holiday, (the Assumption of Mary), again another date to avoid visiting due to the perfect weather.