September weather forecastSantoña, Spain

September

Weather in September

September, the first month of the autumn in Santoña, is also an agreeable month, with an average temperature varying between 17°C (62.6°F) and 20.9°C (69.6°F).

Temperature

With the onset of September, the average high-temperature registers at a still pleasant 20.9°C (69.6°F), subtly different from August's 21.9°C (71.4°F). Santoña's average low temperature, barely cooler than the daytime high, steadies at an enjoyable 17°C (62.6°F) during September.

Humidity

In Santoña, the average relative humidity in September is 75%.

Rainfall

In Santoña, Spain, during September, the rain falls for 8.3 days and regularly aggregates up to 15mm (0.59") of precipitation. In Santoña, Spain, during the entire year, the rain falls for 133.9 days and collects up to 336mm (13.23") of precipitation.

Snowfall

March through November are months without snowfall in Santoña.

Sea temperature

In Santoña, Spain, in September, the average water temperature is 20.6°C (69.1°F).
Note: For most people, swimming in water at 20.6°C (69.1°F) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Santoña, Spain, the average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 07:38 and sunset at 20:48. On the last day of September, sunrise is at 08:10 and sunset at 19:56 CEST.

Sunshine

In September, the average sunshine is 8.4h.

UV index

May through October, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the UV index of 5 transforms into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.

Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature, in September, in Santoña, is 20.9°C (69.6°F), while the average low-temperature is 17°C (62.6°F).

The average relative humidity in September in Santoña, Spain, is 75%.

In Santoña, Spain, in September, during 8.3 rainfall days, 15mm (0.59") of precipitation is typically accumulated.

In Santoña, Spain, snow does not fall in March through November.

In Santoña, Spain, in September, the average water temperature is 20.6°C (69.1°F). For most, swimming in 20.6°C (69.1°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

In Santoña, Spain, the average day length in September is 12h and 30min.

In September, on the first day of the month, sunrise is at 07:38 and sunset at 20:48. On the last day of the month, in Santoña, sunrise is at 08:10 and sunset at 19:56 CEST.

In September, the average sunshine duration is 8.4h.

The months with the highest UV index in Santoña are May through October, with an average maximum UV index of 5.

In September, the average daily maximum UV index in Santoña, Spain, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

21.9°C

20.9°C

19.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.4km/h

13.5km/h

15.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

20.1

19.8

19.1

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Santoña, Spain

Average high temperature in September: 20.9°C

The warmest month (with the highest average high temperature) is August (21.9°C).
The months with the lowest average high temperature are January and February (11.8°C).

Average low temperature in September: 17°C

The month with the highest average low temperature is August (18.1°C).
The coldest month (with the lowest average low temperature) is February (8.4°C).

Average pressure in September
Santoña, Spain

Average pressure in September: 1018.5mbar

The month with the highest atmospheric pressure is December (1021.5mbar).
The months with the lowest atmospheric pressure are April and November (1015.7mbar).

Average wind speed in September
Santoña, Spain

Average wind speed in September: 12.8km/h

The windiest month (with the highest average wind speed) is November (19.5km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).

Average humidity in September
Santoña, Spain

Average humidity in September: 75%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are October and December (72%).

Average rainfall in September
Santoña, Spain

Average rainfall in September: 15mm

The wettest month (with the highest rainfall) is November (53mm).
The driest month (with the least rainfall) is July (14mm).

Average rainfall days in September
Santoña, Spain

Average rainfall days in September: 8.3 days

The month with the highest number of rainy days is January (13.8 days).
The month with the least rainy days is September (8.3 days).

Average snowfall in September
Santoña, Spain

Average snowfall in September: 0mm

The months with the highest snowfall are January and February (4mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).

Average snowfall days in September
Santoña, Spain

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in September
Santoña, Spain

Average sea temperature in September: 20.6°C

The best month for swimming (with the highest average sea temperature) is August (21.2°C).
The coldest month (with the lowest average sea temperature) is February (12.7°C).

Average daylight in September /
Average sunshine in September
Santoña, Spain

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

Average sunshine in September: 8h and 24min

The months with the most sunshine are June and July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 24min).

Average sunshine days in September
Santoña, Spain

Average sunshine days in September: 19.8 days

The month with the most sunshine days is August (20.1 days).
The month with the least sunshine days is February (14.2 days).

Average UV index in September
Santoña, Spain

Average UV index in September: 5

The months with the highest UV index are May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, April and November (UV index 3).

Average cloud cover in September
Santoña, Spain

Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 31).

Average visibility in September
Santoña, Spain

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).