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September Weather in San Bernardino, Paraguay

Last updated: August 31, 2025

In September, the average temperature in San Bernardino, Paraguay hovers around 23°C (73°F). Expect a wide range, with minimums dipping to 10°C (49°F) and maximums soaring to 40°C (105°F). During this month, precipitation averages 77 mm (3.0 in) over 6 days, accompanied by a comfortable average humidity of 47%.

September Temperature in San Bernardino

In September, in San Bernardino, the average temperature is 23°C (73°F). Maximum temperatures can reach up to 40°C (105°F), while minimums can drop as low as 10°C (49°F). This range makes San Bernardino a great destination for travelers seeking warm weather, but it's advisable to pack layers for cooler evenings.

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

The chart illustrates September temperature patterns in San Bernardino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bernardino, September typically has an average temperature of 23°C (73°F), with highs reaching up to 40°C (105°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec828179746865636773767881
Data source: Temperature data for San Bernardino 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 Bernardino

In San Bernardino in September, the total precipitation amount is 77 mm (3.0 in) occurring over a span of 6 days.

September Precipitation Trends in San Bernardino

The chart displays monthly precipitation patterns in San Bernardino, 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 Bernardino, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec1298910111612779444977208163108
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Bernardino

In San Bernardino in September humidity is 47%. With an average temperature of 23°C (73°F), this humidity feels like a pleasant embrace, making it quite comfortable for traveling as you can enjoy the outdoors without feeling overly sticky or drenched in sweat.

September Average Humidity in San Bernardino

This chart illustrates the average monthly humidity levels in San Bernardino, 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 Bernardino is approximately 47%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%76%76%76%75%65%60%43%47%52%71%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Bernardino

In San Bernardino 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 San Bernardino.

Maximum UV Index Levels in San Bernardino for September

The chart shows the monthly maximum UV Index (UVI) for San Bernardino 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 Bernardino typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310756810131414
Data source: San Bernardino 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 Bernardino Compares to Other Months

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

This table compares monthly weather conditions in San Bernardino, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)129 mm (5.1 inches)80%extreme
February Weather27°C (81°F)89 mm (3.5 inches)75%extreme
March Weather26°C (79°F)101 mm (4.0 inches)76%extreme
April Weather23°C (74°F)116 mm (4.6 inches)76%very high
May Weather20°C (68°F)127 mm (5.0 inches)75%high
June Weather18°C (65°F)79 mm (3.1 inches)65%moderate
July Weather17°C (64°F)44 mm (1.7 inches)60%high
August Weather20°C (67°F)49 mm (1.9 inches)43%very high
September Weather23°C (73°F)77 mm (3.0 inches)47%very high
October Weather24°C (76°F)208 mm (8.2 inches)52%extreme
November Weather26°C (79°F)163 mm (6.4 inches)71%extreme
December Weather27°C (81°F)108 mm (4.2 inches)84%extreme

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