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September Weather in San Millan de Lara, Spain

Last updated: August 27, 2025

In September, the average temperature in San Millan de Lara, Spain is a comfortable 15°C (60°F). Expect a minimum of 2°C (36°F) and a maximum of 30°C (85°F) during the day. Rainfall can be anticipated with 65 mm (2.5 in) spread over about 10 days, while the average humidity hovers around a tropical 77%.

September Temperature in San Millan de Lara

In September in San Millan de Lara, the average temperature is 15°C (60°F). Maximum temperatures can reach 30°C (85°F), while minimums can drop to as low as 2°C (36°F). This range makes San Millan de Lara a versatile destination for travelers, offering enjoyable experiences for both warm-weather enthusiasts and those who prefer cooler conditions.

September Weather in San Millan de Lara: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Millan de Lara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Millan de Lara, September typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (85°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec364143475360656660524340
Data source: Temperature data for San Millan de Lara 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 San Millan de Lara

In San Millan de Lara in September, the total precipitation amount is 65 mm (2.5 in) over the course of 10 days.

September Precipitation Trends in San Millan de Lara

The chart displays monthly precipitation patterns in San Millan de Lara, 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 San Millan de Lara, September typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec77728612388935027656210988
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Millan de Lara

In San Millan de Lara in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in San Millan de Lara

This chart illustrates the average monthly humidity levels in San Millan de Lara, 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 San Millan de Lara 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 San Millan de Lara

In San Millan de Lara 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 San Millan de Lara.

Maximum UV Index Levels in San Millan de Lara for September

The chart shows the monthly maximum UV Index (UVI) for San Millan de Lara 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 San Millan de Lara typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111098632
Data source: San Millan de Lara 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 San Millan de Lara Compares to Other Months

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

This table compares monthly weather conditions in San Millan de Lara, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)77 mm (3.0 inches)85%moderate
February Weather5°C (41°F)72 mm (2.8 inches)83%moderate
March Weather6°C (43°F)86 mm (3.4 inches)82%high
April Weather8°C (47°F)123 mm (4.8 inches)81%very high
May Weather12°C (54°F)88 mm (3.5 inches)81%very high
June Weather16°C (61°F)93 mm (3.7 inches)83%extreme
July Weather18°C (65°F)50 mm (2.0 inches)87%very high
August Weather19°C (66°F)27 mm (1.1 inches)82%very high
September Weather15°C (60°F)65 mm (2.5 inches)77%very high
October Weather11°C (52°F)62 mm (2.4 inches)80%high
November Weather6°C (43°F)108 mm (4.3 inches)83%moderate
December Weather4°C (40°F)88 mm (3.5 inches)85%low

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