August weather forecast
Bilbao, Spain

A bridge across the river connecting the old town of Bilbao, Spain
A bridge across the river connecting the old town of Bilbao, Spain

Weather in August

The last month of the summer, August, is a moderately hot month in Bilbao, Spain, with temperature in the range of an average high of 23.3°C (73.9°F) and an average low of 16.9°C (62.4°F).

Temperature

The warmest month is August, with an average high-temperature of 23.3°C (73.9°F) and an average low-temperature of 16.9°C (62.4°F).

Humidity

In August, the average relative humidity in Bilbao is 75%.

Rainfall

In Bilbao, during August, the rain falls for 15.3 days and regularly aggregates up to 33mm (1.3") of precipitation. Throughout the year, there are 198.1 rainfall days, and 634mm (24.96") of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Bilbao.

Sea temperature

The month with the warmest seawater in Bilbao is August, with an average sea temperature of 21°C (69.8°F).
Note: Swimming in 21°C (69.8°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

The average length of the day in August in Bilbao is 13h and 55min.
On the first day of August, sunrise is at 07:01 and sunset at 21:34. On the last day of the month, sunrise is at 07:34 and sunset at 20:49 CEST.

Sunshine

The average sunshine in August in Bilbao, Spain, is 8.5h.

UV index

May through September, with an average maximum UV index of 5, are months with the highest UV index in Bilbao. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in August transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Bilbao?

The warmest month in Bilbao, Spain, is August, with an average high-temperature of 23.3°C (73.9°F) and an average low-temperature of 16.9°C (62.4°F).

What is the average humidity in August in Bilbao?

The average relative humidity in August in Bilbao is 75%.

How much does it rain in Bilbao in August?

In Bilbao, during August, the rain falls for 15.3 days and regularly aggregates up to 33mm (1.3") of precipitation.

When it does not snow in Bilbao?

April through November are months without snowfall.

What is the month with the warmest sea water in Bilbao?

With an average sea temperature of 21°C (69.8°F), August is the month with the warmest seawater in Bilbao.

What is the sea water temperature in August in Bilbao?

In August, the average sea temperature in Bilbao is 21°C (69.8°F). Swimming in 21°C (69.8°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Bilbao have in August?

In August, the average day length is 13h and 55min.

What time are sunrise and sunset in August in Bilbao?

On the first day of August, sunrise is at 07:01 and sunset at 21:34. On the last day of the month, sunrise is at 07:34 and sunset at 20:49 CEST.

How many hours of sunshine does Bilbao have in August?

In August, the average sunshine duration is 8.5h.

What are the months with the highest UV index in Bilbao?

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

What is the UV index intensity in August in Bilbao?

In Bilbao, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Average temperature in August
Bilbao, Spain

Average temperature in August - Bilbao, Spain
  • Average high temperature in August: 23.3°C

The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (10.8°C).

  • Average low temperature in August: 16.9°C

The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (6.5°C).

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Average pressure in August
Bilbao, Spain

Average pressure in August - Bilbao, Spain
  • Average pressure in August: 1018mbar

The month with the highest atmospheric pressure is December (1021.8mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).

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Average wind speed in August
Bilbao, Spain

Average wind speed in August - Bilbao, Spain
  • Average wind speed in August: 9.9km/h

The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).

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Average humidity in August
Bilbao, Spain

Average humidity in August - Bilbao, Spain
  • Average humidity in August: 75%

The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in August
Bilbao, Spain

Average rainfall in August - Bilbao, Spain
  • Average rainfall in August: 33mm

The wettest month (with the highest rainfall) is November (103mm).
The driest month (with the least rainfall) is September (31mm).

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Average rainfall days in August
Bilbao, Spain

Average rainfall days in August - Bilbao, Spain
  • Average rainfall days in August: 15.3 days

The month with the highest number of rainy days is January (18.6 days).
The month with the least rainy days is October (12.7 days).

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Average snowfall in August
Bilbao, Spain

Average snowfall in August - Bilbao, Spain
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (12mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in August
Bilbao, Spain

Average snowfall days in August - Bilbao, Spain
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in August
Bilbao, Spain

Average sea temperature in August - Bilbao, Spain
  • Average sea temperature in August: 21°C

The best month for swimming (with the highest average sea temperature) is August (21°C).
The coldest months (with the lowest average sea temperature) are February and March (12°C).

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Average daylight in August /
Average sunshine in August
Bilbao, Spain

Average daylight in August / Average sunshine in August - Bilbao, Spain
  • Average daylight in August: 13h and 55min

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 2min).

  • Average sunshine in August: 8.5h

The month with the most sunshine is July (Average sunshine: 9.5h).
The month with the least sunshine is November (Average sunshine: 5.2h).

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Average sunshine days in August
Bilbao, Spain

Average sunshine days in August - Bilbao, Spain
  • Average sunshine days in August: 12.3 days

The month with the most sunshine days is October (15.4 days).
The month with the least sunshine days is May (8.8 days).

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Average UV index in August
Bilbao, Spain

Average UV index in August - Bilbao, Spain
  • Average UV index in August: 5

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

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Average cloud cover in August
Bilbao, Spain

Average cloud cover in August - Bilbao, Spain
  • Average cloud cover in August: 35

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are September and October (Cloud cover 34).

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Average visibility in August
Bilbao, Spain

Average visibility in August - Bilbao, Spain
  • Average visibility in August: 10km

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).

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