Weather in Santander in September 2025
Average weather
Average temperature in Santander in September
Going from a maximum of +31°C during the day to a minimum of +14°C during the night, the temperature in September averages around +25°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +24°C to +24°C.
Is Santander warm or cold in September?
Santander is typically warm in September.
Maximum temperatures go down compared to the previous month from +24°C to +23°C. The minimum temperature also goes down from +18°C to +16°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Santander, here is the comparison with other months:
Climate in Santander in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +23°C | +20°C | ||||
| Min. temperature | ||||||
| +12°C | +10°C | +3°C | ||||
| Max. temperature | ||||||
| +39°C | +34°C | +31°C | ||||
| Rainfall | ||||||
| 66 mm | 83 mm | 112 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 81% | 81% | 81% | ||||
| Air pressure | ||||||
| 1017 HPa | 1017 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 5 | 5 | 5 | ||||
| Cloudy days | ||||||
| 10 | 8 | 8 | ||||
| Rainy days | ||||||
| 16 | 16 | 18 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +24°C in the day, the average maximum temperature lowers to +23°C. Prepare for more rain. Average rainfall goes from 66 mm to 83 mm. Humidity levels don’t change as the month goes on, averaging around 81%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 5 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Santander is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Santander?
Climate Change over Years
The climate in Santander in September has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+17°C) and the highest in 1989 (+19°C). The driest year was 2011 with only 706 mm of rainfall, and the wettest year was 2023 with 1994 mm.
FAQ
Is September a good time to visit Santander?
Can you sunbathe in Santander in September?
Is Santander rainy in September?
Is it sunny in Santander in September?
Other cities in Spain
Monthly weather in Santander
Source of the data
For this page, we’ve looked at the typical weather in Santander, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.