nomadseason

September Weather in Marin, Spain

Last updated: August 27, 2025

In September, the average temperature in Marin, Spain is a pleasant 18°C (66°F). Expect a minimum temperature of 10°C (50°F) and a peak of 31°C (88°F). During this month, 54 mm (2.1 in) of precipitation is expected over 8 days, contributing to an average humidity level of 79%.

September Temperature in Marin

In September in Marin, the average temperature is 18°C (66°F). Maximum can reach 31°C (88°F) and minimum can be as low as 10°C (50°F). This mild climate makes Marin an ideal destination for travelers seeking pleasant weather and a comfortable outdoor experience.

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

The chart illustrates September temperature patterns in Marin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marin, September typically has an average temperature of 18°C (66°F), with highs reaching up to 31°C (88°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec495252556063676765605452
Data source: Temperature data for Marin 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 Marin

In Marin in September, the total precipitation amount reaches 54 mm (2.1 in) over a span of 8 days.

September Precipitation Trends in Marin

The chart displays monthly precipitation patterns in Marin, 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 Marin, September typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec12516716713810561293554140189225
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Marin

In Marin in September, humidity is 79%. With an average temperature of 18°C (66°F), this humidity feels like a warm, enveloping blanket, making outdoor activities slightly uncomfortable and sticky, but also offering a vibrant atmosphere perfect for exploring local cafes and shaded parks.

September Average Humidity in Marin

This chart illustrates the average monthly humidity levels in Marin, 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 Marin is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%83%83%83%82%78%79%82%84%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Marin

In Marin 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 Marin.

Maximum UV Index Levels in Marin for September

The chart shows the monthly maximum UV Index (UVI) for Marin 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 Marin typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997632
Data source: Marin 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 Marin Compares to Other Months

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

This table compares monthly weather conditions in Marin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)125 mm (4.9 inches)84%low
February Weather11°C (52°F)167 mm (6.6 inches)83%moderate
March Weather11°C (53°F)167 mm (6.6 inches)82%moderate
April Weather13°C (56°F)138 mm (5.4 inches)83%very high
May Weather16°C (61°F)105 mm (4.1 inches)83%very high
June Weather17°C (64°F)61 mm (2.4 inches)83%very high
July Weather20°C (68°F)29 mm (1.1 inches)82%very high
August Weather20°C (68°F)35 mm (1.4 inches)78%very high
September Weather18°C (66°F)54 mm (2.1 inches)79%high
October Weather16°C (60°F)140 mm (5.5 inches)82%high
November Weather12°C (54°F)189 mm (7.5 inches)84%moderate
December Weather11°C (52°F)225 mm (8.9 inches)85%low

Compare Marin's Climate with Cities Worldwide