Normal weather for Costa Vasca in September
It's warm in September in Costa Vasca with an average temperature of 23°C. Temperatures this month range from a low of 21°C to a high of 25°C. At night, you can expect temperatures between 13°C and 17°C.
In September, there is an average of 77 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the South.
Costa Vasca in September |
UK | ||
|---|---|---|---|
 Average Temperature |
23°C | 20°C | |
 High Temp |
25°C | 22°C | |
| Low Temp |
21°C | 17°C | |
 Total Precipitation |
77 mm | 44 mm | |
| Rainy Days |
11 days | 8 days | |
Start of September
The month of September starts in Costa Vasca with warm temperatures, averaging around 25°C during the day and nights close to 16°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
Mid-September
By mid-September, the average daytime temperature drops to around 24°C, with nights close to 16°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
Temperatures vary between day and night, so it’s smart to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
End of September
By the end of September, the average daytime temperature in Costa Vasca will be around 22°C, with nights close to 14°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
Discover cheap holidays to Costa Vasca 
Water temperature
The water temperature at Costa Vasca is 23°C this month. Comfortable for a swim.
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Costa Vasca?
Want nice weather? Then September is a great time to be in Costa Vasca. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Costa Vasca in September
With 34°C, Costa Vasca hit the highest temperature in the last 10 years in September 2018. The lowest daytime temperature in this month was 15°C in 2022. The extreme night temperatures ranged from a low of 7°C to a high of 22°C.
Check out the climate of Costa Vasca for all months and discover the best travel time
The climate of Costa Vasca is based on weather data from San Sebastián. Other locations might have different weather.
August
Plan your next holiday
Don’t miss the best holiday deals for Costa Vasca and see what our partners have for you.
Daily Temperature in September in Costa Vasca
This chart shows the average daily temperatures, both day and night, for each day in September in Costa Vasca, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Costa Vasca
The chart below shows the average daily precipitation in September for Costa Vasca, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 11 days of rain in Costa Vasca.
Daily UV Index in September in Costa Vasca
This chart shows the average daily UV index in September in Costa Vasca, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Costa Vasca Over the Years
This chart shows the average temperature in September in Costa Vasca, measured in degrees Celsius, over the past years.
Total Precipitation in September in Costa Vasca Over the Years
This chart shows the average precipitation in September in Costa Vasca, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Costa Vasca
Click on a specific day in September for detailed info on the typical weather on that day in Costa Vasca. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Costa Vasca
Have you been to Costa Vasca in September?
Share your weather experience in September in Costa Vasca.
Average Weather in Costa Vasca by Month
Click on a month below to see detailed weather info for Costa Vasca. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Costa Vasca for all months at once
