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September Weather in Riano, Spain

Last updated: August 27, 2025

In September, the average temperature in Riano, Spain hovers around 14°C (57°F), with minimums dipping to 2°C (35°F) and maximums soaring up to 26°C (80°F). Expect some rainfall, with an average precipitation of 78 mm (3.1 in) spread over 12 days. Humidity levels are relatively high, averaging around 77%, creating a comfortable, albeit damp, atmosphere.

September Temperature in Riano

In September in Riano, the average temperature is 14°C (57°F). Maximum temperatures can reach 26°C (80°F), while minimum temperatures can drop as low as 2°C (35°F). This variance makes it advisable to pack layers and be prepared for both warm and cool weather when traveling.

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

The chart illustrates September temperature patterns in Riano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riano, September typically has an average temperature of 14°C (57°F), with highs reaching up to 26°C (80°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec353940445157626257504138
Data source: Temperature data for Riano 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 Riano

In Riano in September, the precipitation amount is 78 mm (3.1 in), occurring over a span of 12 days.

September Precipitation Trends in Riano

The chart displays monthly precipitation patterns in Riano, 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 Riano, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec899711410810511575647896143149
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Riano

In Riano in September, humidity is 77%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel muggy and leaving you craving the shade while you travel.

September Average Humidity in Riano

This chart illustrates the average monthly humidity levels in Riano, 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 Riano is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%83%84%84%86%78%77%82%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Riano

In Riano 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 Riano.

Maximum UV Index Levels in Riano for September

The chart shows the monthly maximum UV Index (UVI) for Riano 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 Riano typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098532
Data source: Riano 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 Riano Compares to Other Months

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

This table compares monthly weather conditions in Riano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)89 mm (3.5 inches)87%low
February Weather4°C (39°F)97 mm (3.8 inches)85%moderate
March Weather5°C (40°F)114 mm (4.5 inches)83%high
April Weather7°C (45°F)108 mm (4.3 inches)83%very high
May Weather10°C (51°F)105 mm (4.1 inches)84%very high
June Weather14°C (57°F)115 mm (4.5 inches)84%extreme
July Weather16°C (62°F)75 mm (2.9 inches)86%very high
August Weather17°C (62°F)64 mm (2.5 inches)78%very high
September Weather14°C (57°F)78 mm (3.1 inches)77%very high
October Weather10°C (50°F)96 mm (3.8 inches)82%moderate
November Weather5°C (41°F)143 mm (5.6 inches)86%moderate
December Weather3°C (38°F)149 mm (5.9 inches)87%low

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