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September Weather in Galdakao, Spain

Last updated: August 27, 2025

In September, the average temperature in Galdakao, Spain hovers around 18°C (65°F). Expect a comfortable range, with minimums dropping to 10°C (49°F) and maximums reaching up to 30°C (87°F). However, be prepared for some rain, as 84 mm (3.3 in) of precipitation typically falls over 12 days. With an average humidity of 77%, you'll feel the warm embrace of the season.

September Temperature in Galdakao

In September in Galdakao, the average temperature is 18°C (65°F). Maximums can reach 30°C (87°F), and minimums can be as low as 10°C (49°F). This makes Galdakao an ideal destination for travelers seeking a mild climate and pleasant outdoor experiences.

September Weather in Galdakao: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Galdakao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Galdakao, September typically has an average temperature of 18°C (65°F), with highs reaching up to 30°C (87°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec465051545863666765595250
Data source: Temperature data for Galdakao generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Galdakao

In Galdakao in September, the precipitation amount is 84 mm (3.3 in) over a span of 12 days.

September Precipitation Trends in Galdakao

The chart displays monthly precipitation patterns in Galdakao, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Galdakao, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1281121039592105736784115168172
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Galdakao

In Galdakao in September humidity is 77%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace that's both refreshing and slightly stifling, making it essential for travelers to stay hydrated and take frequent breaks to enjoy the vibrant surroundings without feeling overly fatigued.

September Average Humidity in Galdakao

This chart illustrates the average monthly humidity levels in Galdakao, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Galdakao is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%81%81%83%87%82%77%80%83%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Galdakao

In Galdakao in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Galdakao.

Maximum UV Index Levels in Galdakao for September

The chart shows the monthly maximum UV Index (UVI) for Galdakao in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Galdakao typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Galdakao September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Galdakao Compares to Other Months

Weather in Galdakao varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Galdakao, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Galdakao, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)127 mm (5.0 inches)85%low
February Weather10°C (50°F)112 mm (4.4 inches)83%moderate
March Weather10°C (51°F)102 mm (4.0 inches)82%high
April Weather12°C (54°F)95 mm (3.7 inches)81%high
May Weather14°C (58°F)92 mm (3.6 inches)81%very high
June Weather17°C (63°F)105 mm (4.1 inches)83%very high
July Weather19°C (67°F)73 mm (2.9 inches)87%very high
August Weather20°C (68°F)67 mm (2.6 inches)82%very high
September Weather18°C (65°F)84 mm (3.3 inches)77%high
October Weather15°C (59°F)115 mm (4.5 inches)80%moderate
November Weather11°C (53°F)168 mm (6.6 inches)83%moderate
December Weather10°C (50°F)172 mm (6.8 inches)85%low

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