San Sebastián monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at San Sebastián

San Sebastián average temperature chart (Celsius) San Sebastián average temperature chart (Fahrenheit)
Average monthly temperatures in San Sebastián (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.9 11.8 13.4 14.8 17.9 20.7 23.3 23.4 22.4 19.1 14.1 11.4
°F 51.6 53.3 56.1 58.6 64.2 69.2 73.9 74 72.4 66.4 57.4 52.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

San Sebastián monthly rainfall chart (mm) San Sebastián monthly rainfall chart (inches)
Average monthly rainfall in San Sebastián (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 127 103 103 122 107 77 62 90 97 121 143 133
inches 5 4.1 4 4.8 4.2 3 2.4 3.5 3.8 4.8 5.6 5.2
Rainy days 18 16 17 18 17 13 12 13 13 14 17 17

Average daily sunshine

The bar chart below shows the average daily sunshine hours in San Sebastián

San Sebastián average daily sunshine chart
Average daily sunshine San Sebastián
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.3 3.9 4.8 5.1 6.2 7.1 7.6 7 6.4 5 3.8 3.1

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

San Sebastián average minimum / maximum temperatures (Celsius) San Sebastián average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Sebastián (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.4 5 5.7 7.5 10.1 13 15.4 15.5 14 11.3 7.3 5.2
Max °C 11.1 12 13.6 15 18.1 20.9 23.5 23.6 22.7 19.3 14.3 11.6
Min °F 39.8 41 42.2 45.4 50.2 55.3 59.6 59.8 57.1 52.3 45.1 41.4
Max °F 45.9 47.3 49.3 52.2 57.4 62.4 66.9 67.1 64.9 59.5 51.4 47.1

Sea temperature

The graph below shows the average sea temperature.

San Sebastián average sea temperature chart (Celsius) San Sebastián average sea temperature chart (Fahrenheit)
Average sea temperature around San Sebastián in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.8 12.4 12.5 13.2 15.3 18.5 20.9 21.8 20.5 17.9 15.4 13.7
°F 55.1 54.3 54.4 55.7 59.6 65.4 69.6 71.2 68.8 64.3 59.8 56.6

Wind speed

The graph below shows the average wind speed.

San Sebastián average winspeed by month (km/h) San Sebastián average winspeed by month (mph)
Average wind speed in San Sebastián (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 14 14 14 14 13 12 12 12 11 12 13 14
mph 9 9 9 9 8 7 7 7 7 7 8 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

San Sebastián relative humidity averages
Average relative humidity in San Sebastián
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
77% 74% 72% 75% 76% 77% 77% 78% 75% 75% 76% 77%
San Sebastián

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San Sebastián weather stats

San Sebastián weather statistics
Hottest month: August 23.4°C 74.1°F
Driest month: July 62mm 2.4ins
Sunniest month: July 7.6hrs
Coldest month: January 10.9°C 51.6°F
Wettest month: November 143mm 5.6ins
Warmest sea: August 21.8°C 71.2°F
Map showing location of San Sebastián (43.31283, -1.97499)

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