, with mild, rainy winters and quite cool summers. We are in the north of Spain, where the climate is much cooler and more humid than in the rest of the country.
, at the mouth of the Urumea River, and about 15 kilometers (9 miles) from the border with France. There are three beaches: Ondarreta, La Concha and la Zurriola.
blows frequently from the ocean, and can be strong, especially in the cold half of the year. On the other hand, the warm and dry southerly wind, which descends from the Cantabrian Mountains, can cause sudden increases in temperature due to the
Although the climate is mild, cold waves in winter are more intense than in the rest of the northern Spanish coast, due to its proximity to France. In addition, the rains are particularly abundant.
of the coldest month (January) is of 8.5 °C (47 °F), that of the warmest month (August) is of 20 °C (68 °F).
, from December to February, is mild and rainy. Atlantic disturbances regularly pass over northern Spain, bringing rain and cloudy skies.
With the wind from the south, the temperature can exceed 20 °C (68 °F) even in the middle of winter.
, although they are quite rare. Generally, on the coldest nights of the year, there are only slight frosts, but sometimes it can get very cold. In February 1956, the temperature dropped to -12 °C (10.5 °F), while in January 1985, it dropped to -10 °C (14 °F). From 2000 to 2020, it dropped to -5.5 °C (22 °F) in December 2001 and in February 2012.
in San Sebastián is rare, however, from time to time, the city can be covered with snow. In February 1996, even 30 cm (12 in) of snow fell. More recently, snow thickness reached 5 cm (2 in) in January 2010 and February 2018.
, from June to August or mid-September, is quite cool. The rains are quite frequent even in this season, and the sun doesn't shine very often. Fog can form at night and early in the morning.
, usually only for a day or two. On the hottest days of the year, the temperature typically reaches 35 °C (95 °F), but can sometimes reach higher values. In July 2019 and 2020, it reached 39 °C (102 °F). In 2003, it had reached 38 °C (100.5 °F) in June and 38.5 °C (101 °F) in August.
temperature ranges between 12 °C (54 °F) and 22 °C (72 °F). The sea is cool even in summer, although it is a little less cool than in Galicia and Asturias.
to visit San Sebastián is from June to mid-September, since it is the mildest and least rainy of the year.
To go to the beach, the preferable months are July and August (and the beginning of September if the weather is good).
The following data were recorded at the weather station, located on Mount Igueldo, a 260-meter-high (850 feet) hill.
. Here are the average temperatures.
January, the coldest month of the year, is generally a mild month. The average temperature is of
8.6 °C, with a minimum of
6.2 °C and a maximum of
11.1 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-3.2 °C in January 2007.
On the warmest days of the month, the temperature usually reaches around
18 °C. However, it reached
21 °C in January 1999.
Precipitation amounts to
140 mm, distributed over 13 days.
The day lasts on average 9 hours and 25 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
The average sea temperature is of
12.8 °C. Therefore, the sea is very cold for swimming.
February is generally a mild month. The average temperature is of
8.8 °C, with a minimum of
6 °C and a maximum of
11.6 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-5.3 °C in February 2012.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
25.6 °C in February 2019.
Precipitation amounts to
110 mm, distributed over 12 days.
The day lasts on average 10 hours and 35 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
The average sea temperature is of
12.4 °C. Therefore, the sea is very cold for swimming.
March is generally a mild month. The average temperature is of
10.6 °C, with a minimum of
7.7 °C and a maximum of
13.6 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-4.7 °C in March 2005.
On the warmest days of the month, the temperature usually reaches around
22.5 °C. However, it reached
25.6 °C in March 2007.
Precipitation amounts to
115 mm, distributed over 12 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
The average sea temperature is of
12.5 °C. Therefore, the sea is very cold for swimming.
April is generally a mild month. The average temperature is of
12 °C, with a minimum of
8.8 °C and a maximum of
15.1 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
1.6 °C in April 1996.
On the warmest days of the month, the temperature usually reaches around
25 °C. However, it reached
30.1 °C in April 2010.
Precipitation amounts to
140 mm, distributed over 14 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
The average sea temperature is of
13.2 °C. Therefore, the sea is very cold for swimming.
May is generally a very mild month. The average temperature is of
14.7 °C, with a minimum of
11.4 °C and a maximum of
18 °C.
On the coldest nights of the month, the temperature usually drops to around
7 °C. However, it dropped to
3.6 °C in May 2019.
On the warmest days of the month, the temperature usually reaches around
28.5 °C. However, it reached
33.2 °C in May 1996.
Precipitation amounts to
120 mm, distributed over 12 days.
The day lasts on average 14 hours and 40 minutes. So the days are long.
There are on average 6 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
13 kph.
The average sea temperature is of
15.3 °C. Therefore, the sea is cold for swimming.
June is generally a very mild month. The average temperature is of
17.2 °C, with a minimum of
14.2 °C and a maximum of
20.3 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
8.8 °C in June 1992.
On the warmest days of the month, the temperature usually reaches around
31.5 °C. However, it reached
38 °C in June 2003.
Precipitation amounts to
90 mm, distributed over 11 days.
The day lasts on average 15 hours and 20 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 6.5 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
12 kph.
The average sea temperature is of
18.5 °C. Therefore, the sea is very cool for swimming.
July is generally a warm month. The average temperature is of
19.2 °C, with a minimum of
16.3 °C and a maximum of
22 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C. However, it dropped to
10 °C in July 1993.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
39 °C in July 2019.
Precipitation amounts to
85 mm, distributed over 10 days.
The day lasts on average 15 hours and 0 minutes. So the days are long.
There are on average 6.5 hours of sunshine per day. So, the sun shines 42% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
12 kph.
The average sea temperature is of
20.9 °C. Therefore, the sea is cool for swimming.
August, the warmest month of the year, is generally a warm month. The average temperature is of
19.8 °C, with a minimum of
16.8 °C and a maximum of
22.9 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C. However, it dropped to
11.6 °C in August 1998.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
38.6 °C in August 2003.
Precipitation amounts to
115 mm, distributed over 11 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of
12 kph.
The average sea temperature is of
21.8 °C. Therefore, the sea is cool for swimming.
September is generally a very mild month. The average temperature is of
18 °C, with a minimum of
14.9 °C and a maximum of
21.2 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
8 °C in September 2002.
On the warmest days of the month, the temperature usually reaches around
30 °C. However, it reached
35.6 °C in September 2016.
Precipitation amounts to
110 mm, distributed over 10 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
11 kph.
The average sea temperature is of
20.5 °C. Therefore, the sea is cool for swimming.
October is generally a very mild month. The average temperature is of
15.6 °C, with a minimum of
12.6 °C and a maximum of
18.6 °C.
On the coldest nights of the month, the temperature usually drops to around
6.5 °C. However, it dropped to
0 °C in October 2018.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
29.8 °C in October 2001.
Precipitation amounts to
160 mm, distributed over 12 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
12 kph.
The average sea temperature is of
17.9 °C. Therefore, the sea is cold for swimming.
November is generally a mild month. The average temperature is of
11.6 °C, with a minimum of
9 °C and a maximum of
14.1 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-1.4 °C in November 2007.
On the warmest days of the month, the temperature usually reaches around
21.5 °C. However, it reached
25.6 °C in November 2015.
Precipitation amounts to
170 mm, distributed over 13 days.
The day lasts on average 9 hours and 40 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
13 kph.
The average sea temperature is of
15.4 °C. Therefore, the sea is cold for swimming.
December is generally a mild month. The average temperature is of
9.4 °C, with a minimum of
7 °C and a maximum of
11.9 °C.
On the coldest nights of the month, the temperature usually drops to around
1 °C. However, it dropped to
-5.6 °C in December 2001.
On the warmest days of the month, the temperature usually reaches around
18 °C. However, it reached
22.2 °C in December 2015.
Precipitation amounts to
150 mm, distributed over 13 days.
The day lasts on average 9 hours and 0 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 3 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
The average sea temperature is of
13.7 °C. Therefore, the sea is very cold for swimming.