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September Weather in San Jeronimo, Colombia

Last updated: August 23, 2025

In September, the average temperature in San Jeronimo, Colombia hovers around 18°C (65°F). Expect minimums of 11°C (51°F) and maximums reaching 28°C (82°F). With an average humidity of 88%, the air can feel quite heavy, especially during the 24 rainy days that contribute to a precipitation total of 234 mm (9.2 in). Prepare for a blend of warmth and moisture this season!

September Temperature in San Jeronimo

In September, in San Jeronimo, the average temperature is 18°C (65°F). The maximum can reach 28°C (82°F), and the minimum can be as low as 11°C (51°F). This pleasant climate makes San Jeronimo an ideal destination for travelers seeking mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in San Jeronimo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jeronimo, September typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (82°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec646564646565666564646364
Data source: Temperature data for San Jeronimo 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 Jeronimo

In San Jeronimo in September, the precipitation amount is 234 mm (9.2 in) spread over 24 days.

September Precipitation Trends in San Jeronimo

The chart displays monthly precipitation patterns in San Jeronimo, 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 Jeronimo, September typically receives around 234 mm (9.2 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec6583243377321177117163235252242107
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Jeronimo

In San Jeronimo in September, humidity is 88%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sticky and the air thick, which can be quite tiring when exploring the area.

September Average Humidity in San Jeronimo

This chart illustrates the average monthly humidity levels in San Jeronimo, 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 Jeronimo is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%68%65%73%88%89%89%87%88%89%90%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Jeronimo

In San Jeronimo 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 Jeronimo, you can check here.

Maximum UV Index Levels in San Jeronimo for September

The chart shows the monthly maximum UV Index (UVI) for San Jeronimo 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 Jeronimo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141517161614141514141312
Data source: San Jeronimo 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 Jeronimo Compares to Other Months

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

This table compares monthly weather conditions in San Jeronimo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)65 mm (2.5 inches)74%extreme
February Weather18°C (65°F)83 mm (3.3 inches)68%extreme
March Weather18°C (64°F)243 mm (9.6 inches)65%extreme
April Weather18°C (65°F)377 mm (14.8 inches)73%extreme
May Weather18°C (65°F)321 mm (12.6 inches)88%extreme
June Weather18°C (65°F)177 mm (7.0 inches)89%extreme
July Weather19°C (66°F)117 mm (4.6 inches)89%extreme
August Weather18°C (65°F)163 mm (6.4 inches)87%extreme
September Weather18°C (65°F)234 mm (9.2 inches)88%extreme
October Weather18°C (64°F)252 mm (9.9 inches)89%extreme
November Weather17°C (64°F)242 mm (9.5 inches)90%extreme
December Weather18°C (64°F)106 mm (4.2 inches)85%extreme

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