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September Weather in San Martin, Colombia

Last updated: August 23, 2025

In San Martin, Colombia, the average temperature in September hovers around 24°C (76°F). Expect a comfortable range, with minimums dipping to 19°C (66°F) and maximums reaching up to 31°C (88°F). However, be prepared for the high humidity at 78%, and a significant precipitation amount of 519 mm (20.4 in) spread over 29 days.

September Temperature in San Martin

In September in San Martin, the average temperature is 24°C (76°F). Maximums can reach 31°C (88°F) and minimums can be as low as 19°C (66°F). This pleasant climate makes it an ideal destination for travelers seeking comfortable weather for outdoor activities.

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

The chart illustrates September temperature patterns in San Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin, September typically has an average temperature of 24°C (76°F), with highs reaching up to 31°C (88°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec767978777776767676757676
Data source: Temperature data for San Martin 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 Martin

In San Martin in September, the total precipitation amount is 519 mm (20.4 in) spread over the course of 29 days.

September Precipitation Trends in San Martin

The chart displays monthly precipitation patterns in San Martin, 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 Martin, September typically receives around 519 mm (20.4 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec8728200452696610558563519452322122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Martin

In San Martin in September, humidity is 78%. With an average temperature of 24°C (76°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel sticky and uncomfortable, potentially leading to fatigue for travelers.

September Average Humidity in San Martin

This chart illustrates the average monthly humidity levels in San Martin, 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 Martin is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec52%47%45%54%81%88%88%82%78%83%84%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Martin

In San Martin in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Martin.

Maximum UV Index Levels in San Martin for September

The chart shows the monthly maximum UV Index (UVI) for San Martin 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 Martin typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151413131313131110
Data source: San Martin 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 Martin Compares to Other Months

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

This table compares monthly weather conditions in San Martin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)87 mm (3.4 inches)52%extreme
February Weather26°C (79°F)28 mm (1.1 inches)47%extreme
March Weather26°C (79°F)200 mm (7.9 inches)45%extreme
April Weather25°C (77°F)452 mm (17.8 inches)54%extreme
May Weather25°C (77°F)696 mm (27.4 inches)81%extreme
June Weather25°C (77°F)610 mm (24.0 inches)88%extreme
July Weather24°C (76°F)558 mm (22.0 inches)88%extreme
August Weather24°C (76°F)563 mm (22.2 inches)82%extreme
September Weather24°C (76°F)519 mm (20.4 inches)78%extreme
October Weather24°C (76°F)451 mm (17.8 inches)83%extreme
November Weather24°C (76°F)322 mm (12.7 inches)83%extreme
December Weather25°C (77°F)122 mm (4.8 inches)70%very high

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