San Sebastian in september: average Weather, Temperature and Climate
Weather in San Sebastian in september 2025
The weather in San Sebastian in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
63°F
Clear/Sunny
39% of time
23%
22%
10%
Weather at 12pm
72°F
Clear/Sunny
51% of time
22%
18%
7%
Weather at 6pm
68°F
Clear/Sunny
45% of time
23%
19%
8%
Weather at 3am
63°F
39%
29%
22%
7%
Evolution of daily average temperature and precipitation in San Sebastian in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in San Sebastian in september.
The climate of San Sebastian in september is good
In september in San Sebastian, the climate is wet (with 3.9in of rainfall over 6 days). It should be noted a worsening from the previous month since in august there is an average of 4.1in of rainfall over 7 days.
The climate quite good in this city this month. Temperatures are up to 74°F. On average, the recorded minimum temperature is 63°F. Thus, the mean temperature average on this month of september in San Sebastian is 68°F. These temperatures are far removed from those records observed in San Sebastian in september with a maximum record of 94°F in 2021 and a minimum record of 50°F in 2020.
On this month of september, day length in San Sebastian is generally 12:31. Sunrise is at 06:47 and sunset is at 19:18.
With a good climate, september is recommended to go in San Sebastian.
Seasonal average climate and temperature of San Sebastian in september
Check below seasonal norms These statistics are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 68°F | ||||
| Highest temperature | 74°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 94°F (2021) | ||||
| Lowest record temperature | 50°F (2020) | ||||
| Number of days at +86°F | 1 day(s) (3%) | ||||
| Number of days at +65°F | 28 day(s) (93%) | ||||
| Sea temperature | |||||
| Average sea temperature | 70°F | ||||
| Lowest sea temperature | 66°F | ||||
| Highest sea temperature | 74°F | ||||
| Wind | |||||
| Wind speed | 15km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.9in | ||||
| Number of days with rainfall | 6 day(s) (21%) | ||||
| Record daily rainfall | 1.8in (2009) | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 9.53km | ||||
| Cloud cover | 34% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:47 | ||||
| Time of sunset | 19:18 | ||||
| Length of day | 12:31 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in San Sebastian in september 2024:
67°F to 74°F
63°F to 72°F
65°F to 67°F
63°F to 68°F
61°F to 67°F
56°F to 61°F
58°F to 68°F
59°F to 68°F
61°F to 68°F
63°F to 67°F
63°F to 67°F
58°F to 63°F
54°F to 65°F
47°F to 68°F
49°F to 63°F
52°F to 65°F
52°F to 65°F
56°F to 70°F
61°F to 76°F
63°F to 70°F
59°F to 76°F
63°F to 67°F
59°F to 65°F
59°F to 70°F
59°F to 76°F
63°F to 72°F
58°F to 61°F
56°F to 61°F
50°F to 70°F
61°F to 68°F
Map: other cities in Spain in september
Cities near San Sebastian:
| Zarautz in september | good weather |
| Getaria in september | good weather |
| Pamplona in september | good weather |
| Bilbao in september | good weather |
| Logroño in september | good weather |
| Bardenas Reales in september | good weather |
| Tudela in september | perfect weather |
| Santander in september | perfect weather |
| Torrelavega in september | perfect weather |
| Soria in september | good weather |
| Burgos in september | good weather |
| Parque Nacional de Ordesa y Monte Perdido in september | good weather |
Click over cities on the map for information about the weather in september.
San Sebastian
perfect weather
good
tolerable
bad
very bad
Weather data for San Sebastian in september:
Weather data for San Sebastian for september are derived from an average of the weather forecast since 2009 in San Sebastian. There is a margin of error and these forecasts are to be considered as general information only. The weather in San Sebastian can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to San Sebastian.