September Weather in Goleta, United States

Last updated: June 24, 2025

In September, the average temperature in Goleta, United States is a comfortable 21°C (70°F). You'll experience minimums that can dip to 9°C (48°F) and maximums soaring up to a sizzling 36°C (97°F). With an average humidity of 48% and a light precipitation total of just 2 mm (0.1 in) over 0 days, it's the perfect time to enjoy the outdoors!

September Temperature in Goleta

In September in Goleta, the average temperature is 21°C (70°F). Maximums can reach 36°C (97°F) and minimums can be as low as 9°C (48°F). This makes it a perfect time for travelers to enjoy a range of outdoor activities while being prepared for varying temperatures.

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

The chart illustrates September temperature patterns in Goleta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Goleta, September typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for Goleta generated using information from the Copernicus Climate Change Service.

September Precipitation in Goleta

In Goleta in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Goleta

The chart displays monthly precipitation patterns in Goleta, 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 Goleta, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Goleta

In Goleta in September humidity is 48%. With an average temperature of 21°C (70°F), this humidity feels like a pleasant and mild embrace, making it comfortable for traveling and exploring the area.

September Average Humidity in Goleta

This chart illustrates the average monthly humidity levels in Goleta, 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 Goleta is approximately 48%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Goleta

In Goleta in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Goleta.

Maximum UV Index Levels in Goleta for September

The chart shows the monthly maximum UV Index (UVI) for Goleta 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 Goleta typically reaches 10, which falls under the very high exposure category.

Data source: Goleta 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 Goleta Compares to Other Months

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

This table compares monthly weather conditions in Goleta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	93 mm (3.7 inches)	78%	moderate
February Weather	12°C (53°F)	81 mm (3.2 inches)	82%	high
March Weather	12°C (55°F)	88 mm (3.5 inches)	75%	very high
April Weather	15°C (60°F)	21 mm (0.8 inches)	68%	very high
May Weather	16°C (62°F)	12 mm (0.5 inches)	57%	extreme
June Weather	19°C (67°F)	4 mm (0.1 inches)	52%	extreme
July Weather	22°C (72°F)	2 mm (0.1 inches)	46%	extreme
August Weather	22°C (72°F)	2 mm (0.1 inches)	39%	extreme
September Weather	21°C (70°F)	2 mm (0.1 inches)	48%	very high
October Weather	18°C (65°F)	10 mm (0.4 inches)	59%	high
November Weather	15°C (60°F)	23 mm (0.9 inches)	72%	moderate
December Weather	12°C (54°F)	62 mm (2.5 inches)	76%	moderate