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September Weather in San Luis, Colombia

Last updated: August 23, 2025

In September, the average temperature in San Luis, Colombia hovers around 26°C (79°F). Expect a comfortable range with minimums as low as 18°C (64°F) and maximums peaking at 36°C (97°F). During this time, precipitation is modest, averaging 32 mm (1.3 in) over 6 days, while humidity remains relatively high at 80%. Enjoy the warm days, but don’t forget your umbrella!

September Temperature in San Luis

In September in San Luis, the average temperature is 26°C (79°F). Maximums can reach 36°C (97°F), and minimums can be as low as 18°C (64°F). This pleasant climate makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in San Luis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Luis, September typically has an average temperature of 26°C (79°F), with highs reaching up to 36°C (97°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec788078777675777879777678
Data source: Temperature data for San Luis 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 Luis

In San Luis in September, the total precipitation amount is 32 mm (1.3 in) over the course of 6 days.

September Precipitation Trends in San Luis

The chart displays monthly precipitation patterns in San Luis, 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 Luis, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec3838931402111418563321109438
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Luis

In San Luis in September humidity is 80%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket, making outdoor activities feel sticky and exhausting, potentially dampening the travel experience and necessitating frequent breaks to cool down and hydrate.

September Average Humidity in San Luis

This chart illustrates the average monthly humidity levels in San Luis, 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 Luis is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%77%80%83%88%87%85%80%80%85%87%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Luis

In San Luis in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Luis, you can check here.

Maximum UV Index Levels in San Luis for September

The chart shows the monthly maximum UV Index (UVI) for San Luis 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 Luis typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141517171614151514151412
Data source: San Luis 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 Luis Compares to Other Months

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

This table compares monthly weather conditions in San Luis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)38 mm (1.5 inches)78%extreme
February Weather27°C (80°F)38 mm (1.5 inches)77%extreme
March Weather25°C (78°F)93 mm (3.7 inches)80%extreme
April Weather25°C (77°F)140 mm (5.5 inches)83%extreme
May Weather24°C (76°F)211 mm (8.3 inches)87%extreme
June Weather24°C (76°F)141 mm (5.6 inches)87%extreme
July Weather25°C (77°F)85 mm (3.3 inches)85%extreme
August Weather26°C (78°F)63 mm (2.5 inches)80%extreme
September Weather26°C (79°F)32 mm (1.3 inches)80%extreme
October Weather25°C (77°F)110 mm (4.3 inches)85%extreme
November Weather25°C (76°F)93 mm (3.7 inches)87%extreme
December Weather26°C (78°F)38 mm (1.5 inches)83%extreme

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