May weather forecast
Bilbao, Spain

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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 May

May in Bilbao is characterized by warmer temperatures and extended daylight hours, as the grips of the colder season loosen further. Rainfall remains consistent around 50mm (1.97"), similar to April, making it a wet yet warm period. This blend of warmth and moisture transforms Bilbao into a verdant paradise, a sight to behold for nature enthusiasts. The inclement weather does little to deter tourists, as the city takes on an energetic vibe with numerous local festivities and events. As May culminates, the anticipation of summer's arrival fills the air.

Temperature

Bilbao experiences a recorded average high-temperature of an enjoyable 17°C (62.6°F) in May, closely aligned with April's 15°C (59°F). Throughout May, the average low-temperature in Bilbao, Spain, records at a cool 11.3°C (52.3°F).

Humidity

The months with the highest humidity in Bilbao are May and June, with an average relative humidity of 79%.

Rainfall

In Bilbao, in May, it is raining for 18.4 days, with typically 50mm (1.97") of accumulated precipitation. Throughout the year, there are 198.1 rainfall days, and 634mm (24.96") of precipitation is accumulated.

Snowfall

In Bilbao, snow does not fall in April through November.

Sea temperature

In May, the average sea temperature in Bilbao is 15°C (59°F).
Note: Swimming is not a pleasant activity for most when the water temperature is 15°C (59°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.

Daylight

In Bilbao, the average length of the day in May is 14h and 41min.
On the first day of the month, sunrise is at 07:04 and sunset at 21:13. On the last day of May, sunrise is at 06:34 and sunset at 21:44 CEST.

Sunshine

In May, the average sunshine is 8.9h.

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 reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Tightly woven clothing, when worn loosely, shields effectively against the Sun.

Frequently asked questions

What are May temperatures in Bilbao?

During May, Bilbao experiences an average high-temperature of 17°C (62.6°F) and a low-temperature of 11.3°C (52.3°F).

What are the most humid months in Bilbao?

The months with the highest humidity in Bilbao are May and June, with an average relative humidity of 79%.

What is the average humidity in May in Bilbao?

In Bilbao, the average relative humidity in May is 79%.

How much does it rain in Bilbao in May?

In Bilbao, Spain, in May, it is raining for 18.4 days, with typically 50mm (1.97") of accumulated precipitation.

When it does not snow in Bilbao?

April through November are months without snowfall in Bilbao, Spain.

What is the sea temperature in May in Bilbao?

In Bilbao, the average seawater temperature in May is 15°C (59°F). Swimming in 15°C (59°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

What is the average length of the day in May in Bilbao?

In May, the average day length in Bilbao is 14h and 41min.

What time are sunrise and sunset in May in Bilbao?

In May, on the first day of the month, sunrise is at 07:04 and sunset at 21:13. On the last day of the month, in Bilbao, sunrise is at 06:34 and sunset at 21:44 CEST.

How long on average sun shines in May in Bilbao?

In May, the average sunshine duration in Bilbao, Spain, is 8.9h.

When is the highest UV index in Bilbao?

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

What is the UV index intensity in May in Bilbao?

In May, the average daily maximum UV index in Bilbao is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Bilbao, Spain

Average temperature in May - Bilbao, Spain
  • Average high temperature in May: 17°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 May: 11.3°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).

Average pressure in May
Bilbao, Spain

Average pressure in May - Bilbao, Spain
  • Average pressure in May: 1017.5mbar

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

Average wind speed in May
Bilbao, Spain

Average wind speed in May - Bilbao, Spain
  • Average wind speed in May: 12.1km/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).

Average humidity in May
Bilbao, Spain

Average humidity in May - Bilbao, Spain
  • Average humidity in May: 79%

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

Average rainfall in May
Bilbao, Spain

Average rainfall in May - Bilbao, Spain
  • Average rainfall in May: 50mm

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

Average rainfall days in May
Bilbao, Spain

Average rainfall days in May - Bilbao, Spain
  • Average rainfall days in May: 18.4 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).

Average snowfall in May
Bilbao, Spain

Average snowfall in May - Bilbao, Spain
  • Average snowfall in May: 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).

Average snowfall days in May
Bilbao, Spain

Average snowfall days in May - Bilbao, Spain
  • Average snowfall days in May: 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).

Average sea temperature in May
Bilbao, Spain

Average sea temperature in May - Bilbao, Spain
  • Average sea temperature in May: 15°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).

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

Average daylight in May / Average sunshine in May - Bilbao, Spain
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is November (Average sunshine: 5h and 12min).

Average sunshine days in May
Bilbao, Spain

Average sunshine days in May - Bilbao, Spain
  • Average sunshine days in May: 8.8 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).

Average UV index in May
Bilbao, Spain

Average UV index in May - Bilbao, Spain
  • Average UV index in May: 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).

Average cloud cover in May
Bilbao, Spain

Average cloud cover in May - Bilbao, Spain
  • Average cloud cover in May: 42

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).

Average visibility in May
Bilbao, Spain

Average visibility in May - Bilbao, Spain
  • Average visibility in May: 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).

Bilbao, Spain

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