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From a climatic point of view, Santiago de Compostela has a very humid and rainy oceanic climate. Its position between the Atlantic ocean and the surrounding mountains makes the capital of Galicia one of the rainiest cities in Europe. The rains are present throughout the year and only decrease in the summer months.
Temperatures are made mild by the influence of the ocean and rarely drop below freezing. The city has only 15 days of frost per year, that is, of minimum temperatures below zero. High temperatures are very rare and temperatures above 30 ° C are exceptional. The average minimum temperatures vary between 4.1 ° C in January and 13.3 ° C in August. Average maximum temperatures vary between 24.7 ° C in August and 11.2 ° C in January. The average annual temperature in Santiago de Compostela is 13 ° C.
The rains are more frequent in winter, but spring and autumn are also quite rainy. On average, Santiago de Compostela receives around 1,800 mm of rain per year. The rainiest months are those of October, November, December and January in these months there are monthly averages of over 200 mm of rain. The driest month is July, with 43 mm of precipitation. Santiago de Compostela has 139 rainy days per year and a total of 1,998 hours of sunshine per year. There are only 54 clear days per year.
Snow is rare and falls on average for only two days a year. Generally the few snowfalls occur in January and February. The fog is present in every month of the year and on average there are 85 days of fog in a year.
WHEN TO GO TO SANTIAGO DE COMPOSTELA
Santiago de Compostela is located in one of the rainiest regions of Europe, so you can expect a shower or a thunderstorm at any time of the year. The relatively least rainy months are the central months of summer, that is, the months of June, July and August, these are the three best months for a visit to the city.
THE CLIMATE OF SANTIAGO DE COMPOSTELA: CLIMATE TABLE
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| SANTIAGO DE COMPOSTELA (260 meters) | ||||
| Month | Average low (°C) | Average high (°C) | Precip. (mm) | Precip. days |
| January | 4,1 | 11,2 | 210 | 15,2 |
| February | 4,1 | 12,5 | 167 | 12,6 |
| March | 5,4 | 15,0 | 146 | 12,8 |
| April | 6,2 | 16,1 | 146 | 14,4 |
| May | 8,5 | 18,6 | 135 | 12,7 |
| June | 11,3 | 22,2 | 72 | 7,6 |
| July | 13,0 | 24,3 | 43 | 5,7 |
| August | 13,3 | 24,7 | 57 | 5,5 |
| September | 11,9 | 22,8 | 107 | 8,4 |
| October | 9,5 | 18,1 | 226 | 14,0 |
| November | 6,7 | 14,1 | 217 | 14,9 |
| December | 5,0 | 11,9 | 261 | 15,9 |
| YEAR | 8,3 | 17,6 | 1787 | 139,5 |
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