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September Weather in Viacha, Bolivia

Last updated: August 22, 2025

In Viacha, Bolivia, the average temperature in September hovers around 9°C (48°F). Expect a minimum drop to -4°C (24°F) and a maximum rise to 21°C (70°F). During this month, you can anticipate about 35 mm (1.4 in) of rain over 10 days, accompanied by an average humidity of 70%.

September Temperature in Viacha

In September in Viacha, the average temperature is 9°C (48°F). Maximum temperatures can reach 21°C (70°F), while the minimum can drop as low as -4°C (24°F). This variation makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Viacha, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viacha, September typically has an average temperature of 9°C (48°F), with highs reaching up to 21°C (70°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec494948484644444547495150
Data source: Temperature data for Viacha 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 Viacha

In Viacha in September, the precipitation amount is 35 mm (1.4 in) spread over a period of 10 days.

September Precipitation Trends in Viacha

The chart displays monthly precipitation patterns in Viacha, 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 Viacha, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1051611325624131415356568144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Viacha

In Viacha in September, humidity is 70%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that can quickly sap your energy, making outdoor activities less enjoyable and requiring extra layers to stay warm and dry while traveling.

September Average Humidity in Viacha

This chart illustrates the average monthly humidity levels in Viacha, 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 Viacha is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%91%89%87%79%64%62%70%75%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Viacha

In Viacha in September, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Viacha.

Maximum UV Index Levels in Viacha for September

The chart shows the monthly maximum UV Index (UVI) for Viacha 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 Viacha typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec191918161310111416181919
Data source: Viacha 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 Viacha Compares to Other Months

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

This table compares monthly weather conditions in Viacha, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)105 mm (4.1 inches)91%extreme
February Weather10°C (49°F)161 mm (6.3 inches)91%extreme
March Weather9°C (49°F)132 mm (5.2 inches)91%extreme
April Weather9°C (48°F)56 mm (2.2 inches)88%extreme
May Weather8°C (46°F)24 mm (0.9 inches)87%extreme
June Weather6°C (44°F)13 mm (0.5 inches)79%very high
July Weather6°C (44°F)14 mm (0.5 inches)64%extreme
August Weather7°C (46°F)15 mm (0.6 inches)62%extreme
September Weather9°C (48°F)35 mm (1.4 inches)70%extreme
October Weather10°C (49°F)65 mm (2.6 inches)75%extreme
November Weather11°C (52°F)68 mm (2.7 inches)84%extreme
December Weather10°C (51°F)144 mm (5.7 inches)87%extreme

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