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September Weather in Santa Barbara, Bolivia

Last updated: August 22, 2025

In September, the average temperature in Santa Barbara, Bolivia hovers around 10°C (50°F), offering a mild climate for outdoor activities. Expect some variability, with minimums plummeting to -4°C (25°F) and highs reaching a comfortable 23°C (74°F). During this time, precipitation accumulates to approximately 14 mm (0.5 in) over about 3 days, complemented by an average humidity of 60%. This makes for a refreshing yet occasionally damp atmosphere, perfect for enjoying the unique charm of the season!

September Temperature in Santa Barbara

In September in Santa Barbara, the average temperature is 10°C (50°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures during this time.

September Weather in Santa Barbara: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santa Barbara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Barbara, September typically has an average temperature of 10°C (50°F), with highs reaching up to 23°C (74°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec525252514642424550545554
Data source: Temperature data for Santa Barbara 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 Santa Barbara

In Santa Barbara in September, the precipitation amount is 14 mm (0.5 in) over the course of 3 days.

September Precipitation Trends in Santa Barbara

The chart displays monthly precipitation patterns in Santa Barbara, 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 Santa Barbara, September typically receives around 14 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec106133106253132143052117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santa Barbara

In Santa Barbara in September, humidity is 60%. With an average temperature of 10°C (50°F), this humidity feels like a crisp chill, making traveling invigorating but requiring a light jacket to stay comfortable.

September Average Humidity in Santa Barbara

This chart illustrates the average monthly humidity levels in Santa Barbara, 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 Santa Barbara is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%90%87%82%59%47%43%60%67%71%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Santa Barbara

In Santa Barbara in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Santa Barbara.

Maximum UV Index Levels in Santa Barbara for September

The chart shows the monthly maximum UV Index (UVI) for Santa Barbara 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 Santa Barbara typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec18181715119101215181919
Data source: Santa Barbara 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 Santa Barbara Compares to Other Months

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

This table compares monthly weather conditions in Santa Barbara, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)106 mm (4.2 inches)87%extreme
February Weather11°C (52°F)133 mm (5.2 inches)88%extreme
March Weather11°C (52°F)106 mm (4.2 inches)89%extreme
April Weather10°C (51°F)25 mm (1.0 inches)87%extreme
May Weather8°C (46°F)3 mm (0.1 inches)82%extreme
June Weather6°C (42°F)1 mm (0.0 inches)59%very high
July Weather6°C (42°F)3 mm (0.1 inches)47%very high
August Weather7°C (45°F)2 mm (0.1 inches)43%extreme
September Weather10°C (50°F)14 mm (0.5 inches)60%extreme
October Weather12°C (54°F)30 mm (1.2 inches)67%extreme
November Weather13°C (55°F)52 mm (2.1 inches)71%extreme
December Weather12°C (54°F)117 mm (4.6 inches)79%extreme

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