nomadseason

September Weather in Bielsa, Spain

Last updated: August 27, 2025

In September, the average temperature in Bielsa, Spain hovers around 11°C (53°F), making it a cool yet inviting time of year. Expect minimums as low as -2°C (29°F) and maximums reaching up to 23°C (74°F). With approximately 115 mm (4.5 in) of rainfall spread over 17 days, it’s wise to carry an umbrella. The average humidity sits comfortably at 73%, adding to the overall atmosphere of this charming destination.

September Temperature in Bielsa

In September in Bielsa, the average temperature is 11°C (53°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -2°C (29°F). This diverse range of temperatures means you'll want to pack layers to enjoy both warm days and chilly evenings.

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

The chart illustrates September temperature patterns in Bielsa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bielsa, September typically has an average temperature of 11°C (53°F), with highs reaching up to 23°C (74°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec283334394855606053453531
Data source: Temperature data for Bielsa generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Bielsa

In Bielsa, in September, the precipitation amount is 115 mm (4.5 in) over the course of 17 days.

September Precipitation Trends in Bielsa

The chart displays monthly precipitation patterns in Bielsa, 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 Bielsa, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec9482119139152172119125115102110152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Bielsa

In Bielsa in September humidity is 73%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities less enjoyable, so travelers should dress in layers to stay comfortable while exploring.

September Average Humidity in Bielsa

This chart illustrates the average monthly humidity levels in Bielsa, 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 Bielsa is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%83%80%77%75%74%72%70%73%82%87%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bielsa

In Bielsa in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Bielsa.

Maximum UV Index Levels in Bielsa for September

The chart shows the monthly maximum UV Index (UVI) for Bielsa 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 Bielsa typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568101111108642
Data source: Bielsa 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 Bielsa Compares to Other Months

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

This table compares monthly weather conditions in Bielsa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)94 mm (3.7 inches)87%moderate
February Weather0°C (33°F)82 mm (3.2 inches)83%moderate
March Weather1°C (35°F)119 mm (4.7 inches)80%high
April Weather4°C (40°F)139 mm (5.5 inches)77%very high
May Weather9°C (48°F)152 mm (6.0 inches)75%very high
June Weather13°C (55°F)172 mm (6.8 inches)74%extreme
July Weather15°C (60°F)119 mm (4.7 inches)72%extreme
August Weather15°C (60°F)125 mm (4.9 inches)70%very high
September Weather11°C (53°F)115 mm (4.5 inches)73%very high
October Weather7°C (46°F)102 mm (4.0 inches)82%high
November Weather1°C (35°F)110 mm (4.3 inches)87%moderate
December Weather-1°C (31°F)152 mm (6.0 inches)88%low

Compare Bielsa's Climate with Cities Worldwide