San Sebastián weather and climate
January
February
March
April
May
June
July
August
September
October
November
December
Overview
July
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Overview
August >
San Sebastián weather and climate
January
February
March
April
May
June
July
August
September
October
November
December
Overview
July
< June
Overview
August >
Day
25 °C
Night
17 °C
Sea
21 °C
Precipitation
63 mm
in month
Rainy days
10 days
in month
Daylight
15 hours
average
Sunshine
7 hours
average
Humidity
77 %
Day
25 °C
Night
17 °C
Sea
21 °C
Precipitation
63 mm
in month
Rainy days
10 days
in month
Daylight
15 hours
average
Sunshine
7 hours
average
Humidity
77 %
Overview: San Sebastián
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We make the most from 40 years of historical weather data to predict the best weather conditions.Weather overview for San Sebastián
Weather overview
In the idyllic coastal city of San Sebastián, Spain, a warm climate prevails with balmy day temperatures peaking at around 26 °C (78 °F) during the sun-drenched month of August. Conversely, the coolest daytime temperatures hover at approximately 13 °C (55 °F) during January. While July may boast of minimal rainfall, with a mere 10 days experiencing showers, April contrasts with the highest frequency of rainy days at 15 days. Aquatic enthusiasts will find sea temperatures ranging from a brisk 12 °C (54 °F) in February to a welcoming 22 °C (71 °F) come August. Night temperatures also show considerable variation, with the coldest nights in January at about 6 °C (42 °F) and the warmest in August reaching 17 °C (62 °F).
January weather
The chill of the day is apparent with the minimum temperature being 13 °C (55 °F) in San Sebastián. The sea temperature dips slightly from the previous month, registering 13 °C (55 °F). Rain becomes more frequent with 14 days of rain, yet the total volume of precipitation falls slightly from the previous month's accumulation. The cold of the night is easily perceptible at 6 °C (42 °F).
February weather
In San Sebastián, the sea temperature reaches its lowest point at 12 °C (54 °F), while an increase in day temperature is noted at 13 °C (56 °F). The occurrence of rainy days begins to decrease, now at 14 days, and a reduction in rainfall volume is also seen, with the figure at 96 mm (3.80 in). The hours of sunshine start to rise, currently averaged at 4 hours.
March weather
With warmer day temperatures reaching 16 °C (61 °F), San Sebastián begins to shake off the winter chill. The ascent in night temperature becomes noticeable in March, while the frequency of rainy days keeps decreasing, averaging at 13 days. Sunlight hours also inch higher, now at 4 hours. The city's humidity hits its yearly low at an average of 72 %.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.April weather
Day temperatures continue their upward trend, peaking at 17 °C (63 °F) in April, while the sea temperature also begins to warm, now at 13 °C (56 °F). The highest number of rainy days is observed this month, tallying 15 days. Rain volume begins to climb. The night temperature maintains its climb, now averaging 9 °C (47 °F).
May weather
The mercury continues to rise in May, with day temperatures now averaging 20 °C (68 °F). The sea also heats up to 16 °C (60 °F). Rainy days see a slight decline to 13 days, and rainfall volume decreases as well. The daylight hours expand further, now at 6 hours, and night temperatures also step up to 12 °C (54 °F).
June weather
June's temperatures signal the onset of summer with the mercury hitting 23 °C (74 °F) during the day, while the sea offers warmth at 19 °C (65 °F). The trend of fewer rainy days continues to manifest itself, now at 11 days. Rainfall volume also falls. Nighttime warmth increases with 15 °C (59 °F) being the average.
July weather
Day temperatures in San Sebastián push to higher levels, averaging at 25 °C (77 °F), while the sea matches the warm trend at 21 °C (70 °F). The peak tourist season is nearing. Sunny days are prolific, with the maximum number recorded, and minimal rainfall at an average of 10 days is seen.
We make the most from 40 years of historical weather data to predict the best weather conditions.August weather
August stands out with its maximum day temperatures averaging at 26 °C (78 °F), and the seas are equally warm. An uptick in rainfall can be noted, now at 83 mm (3.28 in). Tourism remains active. The slowest winds of the year are observed, and the warmth of the night is at its peak.
September weather
Tourism continues to thrive in September with agreeable conditions persisting. Day temperatures commence their decline, and a similar pattern is seen with sea temperatures. Rainfall volume continues its upward trend. A dip in nighttime warmth is also recorded, alongside a decrease in sunlit hours.
October weather
October's cooling trend becomes more pronounced with day assessments averaging at 21 °C (69 °F), paralleled by the sea's cooling. The rising trend in rainy days re-emerges, alongside an increase in rainfall volume. Night temperatures begin their descent, and the shining hours of the sun follow suit.
November weather
The downward trajectory of temperatures continues into November with day figures hitting 16 °C (60 °F) and the sea's chill becoming noticeable. Rainy days surge, and so does the maximum rainfall volume. The cooling of night temperatures is also evident, with the decrease in sunlight hours persisting.
December weather
As the year wanes, so do the temperatures, with the day mercury reading around 13 °C (56 °F). The sea's warmth diminishes accordingly. Rainy days show early signs of decline, and rainfall volume follows suit. The meager sunshine hours mark the year's minimum, while the the strongest winds make their presence felt.
FAQs
What are the day and night temperatures at the start of the year in San Sebastián?
In San Sebastián, January sees day temperatures of around 13 °C (55 °F) and night temperatures dipping to 6 °C (42 °F).
How does the rainfall in San Sebastián change from January to February?
Rainy days in San Sebastián decrease slightly from January to February, with the latter averaging about 14 days of rain.
What level of humidity can be expected in March and what are the implications?
March in San Sebastián brings the lowest humidity of the year, averaging around 72 %. Lower humidity can enhance outdoor comfort for visitors.
What is the typical number of rainy days in April in San Sebastián?
April in San Sebastián is characterized by the highest number of rainy days, with an average of 15 days.
We make the most from 40 years of historical weather data to predict the best weather conditions.With the improving weather, what sea temperature can visitors enjoy in San Sebastián during May?
Visitors to San Sebastián in May can relish in the sea, which warms to an average temperature of 16 °C (60 °F).
How does the temperature in June affect the rainfall in San Sebastián?
As temperatures rise in June, with averages reaching 23 °C (74 °F), San Sebastián experiences fewer rainy days, numbering around 11 days.
What climatic conditions can tourists look forward to in San Sebastián during July?
July in San Sebastián greets tourists with the warmest day temperatures averaging 25 °C (77 °F) and plentiful sunny days, alongside the least number of rainy days.
Does August in San Sebastián provide optimal conditions for beach activities?
Indeed, August in San Sebastián offers optimal beach conditions with peak sea and day temperatures, despite a slight increase in rainfall.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.How do the dropping temperatures in September affect day-to-day activities in San Sebastián?
The decreasing temperatures of September still sustain a pleasant atmosphere conducive to various day-to-day activities in San Sebastián.
As October heralds cooler weather, what changes in rainfall are observed in San Sebastián?
October sees a reversal of the drier trend, with rainfall rates climbing and day temperatures moderating in San Sebastián.
Is the increased rainfall in November significant, and does it affect the overall weather in San Sebastián?
November's increased rainfall is the highest of the year and has a noticeable effect on the cooler and moister weather conditions in San Sebastián.
What is the weather outlook for San Sebastián as December approaches?
With December's arrival, San Sebastián faces cooler temperatures, diminishing sea warmth, and sparse sunny hours, alongside forceful winds.