nomadseason

September Weather in Arroyo Seco, United States

Last updated: June 24, 2025

In Arroyo Seco, United States, the average temperature in September hovers around 14°C (57°F). You can expect a minimum temperature of -2°C (29°F) and a comfortable maximum of 28°C (83°F). With an average precipitation amount of 35 mm (1.4 in) spread over 6 days, make sure to carry an umbrella. The average humidity is around 70%, creating a pleasantly mild atmosphere.

September Temperature in Arroyo Seco

In September in Arroyo Seco, the average temperature is 14°C (57°F). The maximum can reach 28°C (83°F) and the minimum can be as low as -2°C (29°F). This diverse temperature range makes Arroyo Seco a versatile destination for travelers, suitable for both warm and cool weather activities.

September Weather in Arroyo Seco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Arroyo Seco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arroyo Seco, September typically has an average temperature of 14°C (57°F), with highs reaching up to 28°C (83°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec212333415161646257453424
Data source: Temperature data for Arroyo Seco 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 Arroyo Seco

In Arroyo Seco in September, the total precipitation amount is 35 mm (1.4 in) spread over a period of 6 days.

September Precipitation Trends in Arroyo Seco

The chart displays monthly precipitation patterns in Arroyo Seco, 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 Arroyo Seco, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec343245294435915735342831
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Arroyo Seco

In Arroyo Seco in September, humidity is 70%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket wrapping around you, making travel slightly uncomfortable as the air feels heavier and every step seems more laborious.

September Average Humidity in Arroyo Seco

This chart illustrates the average monthly humidity levels in Arroyo Seco, 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 Arroyo Seco is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%75%68%62%55%54%61%70%78%81%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arroyo Seco

In Arroyo Seco in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Arroyo Seco.

Maximum UV Index Levels in Arroyo Seco for September

The chart shows the monthly maximum UV Index (UVI) for Arroyo Seco 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 Arroyo Seco typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213131211864
Data source: Arroyo Seco 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 Arroyo Seco Compares to Other Months

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

This table compares monthly weather conditions in Arroyo Seco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)34 mm (1.3 inches)84%moderate
February Weather-5°C (24°F)32 mm (1.2 inches)84%high
March Weather0°C (33°F)45 mm (1.8 inches)74%very high
April Weather5°C (41°F)29 mm (1.2 inches)68%extreme
May Weather11°C (51°F)44 mm (1.7 inches)62%extreme
June Weather16°C (61°F)35 mm (1.4 inches)55%extreme
July Weather18°C (64°F)91 mm (3.6 inches)54%extreme
August Weather17°C (62°F)57 mm (2.3 inches)61%extreme
September Weather14°C (57°F)35 mm (1.4 inches)70%extreme
October Weather7°C (45°F)34 mm (1.4 inches)78%very high
November Weather1°C (34°F)28 mm (1.1 inches)81%high
December Weather-5°C (24°F)31 mm (1.2 inches)85%moderate

Compare Arroyo Seco's Climate with Cities Worldwide