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September Weather in San Francisco, Venezuela

Last updated: August 28, 2025

In September, the average temperature in San Francisco, Venezuela reaches a warm 30°C (85°F). Expect temperatures to range from a minimum of 24°C (75°F) to a sizzling maximum of 37°C (99°F). During this month, the area typically experiences 83 mm (3.3 in) of precipitation spread across 22 days, with an average humidity level of 76%, making for a notably humid atmosphere.

September Temperature in San Francisco

In September in San Francisco, the average temperature is 30°C (85°F), with maximums reaching up to 37°C (99°F) and minimums dipping as low as 24°C (75°F). This warm weather makes it an ideal destination for travelers seeking sunny escapes and outdoor adventures.

September Weather in San Francisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, September typically has an average temperature of 30°C (85°F), with highs reaching up to 37°C (99°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec838484858585868685838384
Data source: Temperature data for San Francisco 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 San Francisco

In San Francisco in September, the precipitation amount is 83 mm (3.3 in) spread over 22 days.

September Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, 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 San Francisco, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec832240978058748311710413
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Francisco

In San Francisco in September, humidity is 76%. With an average temperature of 30°C (85°F), this humidity feels like a heavy blanket wrapping around you, making traveling quite uncomfortable as the air thickens and even short walks can leave you feeling drenched and exhausted.

September Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, 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 San Francisco is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%65%64%63%64%74%81%80%76%74%72%68%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Francisco

In San Francisco in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Francisco.

Maximum UV Index Levels in San Francisco for September

The chart shows the monthly maximum UV Index (UVI) for San Francisco 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 San Francisco typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111214131312121312131010
Data source: San Francisco 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 San Francisco Compares to Other Months

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

This table compares monthly weather conditions in San Francisco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)8 mm (0.3 inches)65%extreme
February Weather29°C (84°F)3 mm (0.1 inches)65%extreme
March Weather29°C (84°F)22 mm (0.9 inches)64%extreme
April Weather29°C (85°F)40 mm (1.6 inches)62%extreme
May Weather29°C (85°F)97 mm (3.8 inches)63%extreme
June Weather29°C (85°F)80 mm (3.2 inches)74%extreme
July Weather30°C (86°F)58 mm (2.3 inches)81%extreme
August Weather30°C (86°F)74 mm (2.9 inches)80%extreme
September Weather30°C (85°F)83 mm (3.3 inches)76%extreme
October Weather29°C (84°F)117 mm (4.6 inches)74%extreme
November Weather28°C (83°F)104 mm (4.1 inches)72%very high
December Weather29°C (84°F)13 mm (0.5 inches)68%very high

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