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September Weather in Columbia, United States

Last updated: June 24, 2025

In Columbia, United States, the average temperature in September is a comfortable 22°C (72°F). However, temperatures can range from a cool 6°C (42°F) to a warm 35°C (95°F). Be prepared for some rain, as the area experiences about 59 mm (2.3 in) of precipitation over 6 days. With an average humidity of 76%, it's advisable to stay hydrated and plan your activities accordingly!

September Temperature in Columbia

In September in Columbia, the average temperature is 22°C (72°F). Maximums can reach 35°C (95°F), and minimums can be as low as 6°C (42°F). This makes Columbia an ideal destination for travelers seeking pleasant weather, with warm days and cool nights for a comfortable experience.

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

The chart illustrates September temperature patterns in Columbia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Columbia, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec313446546676797672574438
Data source: Temperature data for Columbia 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 Columbia

In Columbia in September, the precipitation amount is 59 mm (2.3 in) over the course of 6 days.

September Precipitation Trends in Columbia

The chart displays monthly precipitation patterns in Columbia, 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 Columbia, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec6961123125181117100116591105842
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Columbia

In Columbia in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in Columbia

This chart illustrates the average monthly humidity levels in Columbia, 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 Columbia is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Columbia

In Columbia in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Columbia.

Maximum UV Index Levels in Columbia for September

The chart shows the monthly maximum UV Index (UVI) for Columbia 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 Columbia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Columbia 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 Columbia Compares to Other Months

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

This table compares monthly weather conditions in Columbia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)69 mm (2.7 inches)82%moderate
February Weather1°C (34°F)61 mm (2.4 inches)80%moderate
March Weather8°C (46°F)123 mm (4.8 inches)80%high
April Weather12°C (54°F)125 mm (4.9 inches)80%very high
May Weather19°C (66°F)181 mm (7.1 inches)82%very high
June Weather24°C (76°F)117 mm (4.6 inches)83%extreme
July Weather26°C (80°F)100 mm (4.0 inches)81%extreme
August Weather24°C (76°F)116 mm (4.6 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)76%very high
October Weather14°C (58°F)109 mm (4.3 inches)76%high
November Weather7°C (44°F)58 mm (2.3 inches)85%moderate
December Weather3°C (38°F)42 mm (1.6 inches)86%moderate

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