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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 pleasant 24°C (76°F). You'll experience a range from a cooler 12°C (55°F) to a warm 34°C (94°F). Be prepared for some rain, as the area sees an average precipitation of 129 mm (5.1 in) over 11 days. The humidity is relatively high, averaging around 80%, adding to the lush and vibrant atmosphere.

September Temperature in Columbia

In September in Columbia, the average temperature is 24°C (76°F). The maximum can reach 34°C (94°F), and the minimum can be as low as 12°C (55°F). This pleasant climate makes it an ideal destination for travelers seeking comfortable weather.

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 24°C (76°F), with highs reaching up to 34°C (94°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec444952617076807975675449
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 129 mm (5.1 in) spread over 11 days, indicating a wet period for the area.

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 129 mm (5.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec961087210212215114818212994101119
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 80%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace that can make exploring outdoors quite draining, so it's essential to stay hydrated and take breaks in the shade while traveling.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%81%80%80%81%82%83%83%80%80%83%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111011109853
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 Weather7°C (45°F)96 mm (3.8 inches)84%moderate
February Weather9°C (49°F)108 mm (4.3 inches)81%high
March Weather11°C (52°F)72 mm (2.8 inches)80%very high
April Weather16°C (62°F)102 mm (4.0 inches)80%very high
May Weather21°C (70°F)122 mm (4.8 inches)81%extreme
June Weather25°C (76°F)151 mm (6.0 inches)82%very high
July Weather27°C (80°F)148 mm (5.8 inches)83%extreme
August Weather26°C (80°F)182 mm (7.1 inches)82%very high
September Weather24°C (76°F)129 mm (5.1 inches)80%very high
October Weather19°C (67°F)94 mm (3.7 inches)79%very high
November Weather12°C (55°F)101 mm (4.0 inches)83%moderate
December Weather9°C (49°F)119 mm (4.7 inches)84%moderate

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