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September Weather in Koah Thum, Cambodia

Last updated: August 22, 2025

In Koah Thum, Cambodia, the average temperature in September reaches a warm 28°C (83°F). Daily temperatures can fluctuate, with a minimum of 24°C (76°F) and a maximum soaring to 35°C (96°F). Expect significant rainfall during this month, with 245 mm (9.6 in) of precipitation spread over 26 days, and an average humidity level of 87%, making it a notably moist period.

September Temperature in Koah Thum

In September in Koah Thum, the average temperature is 28°C (83°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 24°C (76°F). This warm and pleasant climate makes Koah Thum an ideal destination for travelers looking to enjoy outdoor activities and explore the local attractions.

September Weather in Koah Thum: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Koah Thum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koah Thum, September typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (96°F) and lows dropping to around 24°C (76°F).
JanFebMarAprMayJunJulAugSepOctNovDec818285858584838382828281
Data source: Temperature data for Koah Thum 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 Koah Thum

In Koah Thum in September, the total precipitation amount is 245 mm (9.6 in), spread over the course of 26 days.

September Precipitation Trends in Koah Thum

The chart displays monthly precipitation patterns in Koah Thum, 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 Koah Thum, September typically receives around 245 mm (9.6 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec23112410215417420122224525812246
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Koah Thum

In Koah Thum in September humidity is 87%. With an average temperature of 28°C (83°F), this humidity feels like you're enveloped in a warm, sticky blanket, making outdoor activities slightly uncomfortable and travel plans require frequent breaks for hydration and respite from the heat.

September Average Humidity in Koah Thum

This chart illustrates the average monthly humidity levels in Koah Thum, 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 Koah Thum is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec62%61%61%67%78%84%86%88%87%85%84%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Koah Thum

In Koah Thum 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 Koah Thum, you can check here.

Maximum UV Index Levels in Koah Thum for September

The chart shows the monthly maximum UV Index (UVI) for Koah Thum 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 Koah Thum typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec101415151513141414131110
Data source: Koah Thum 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 Koah Thum Compares to Other Months

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

This table compares monthly weather conditions in Koah Thum, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)23 mm (0.9 inches)62%very high
February Weather28°C (82°F)11 mm (0.4 inches)61%extreme
March Weather29°C (85°F)24 mm (0.9 inches)61%extreme
April Weather30°C (86°F)101 mm (4.0 inches)67%extreme
May Weather29°C (85°F)154 mm (6.1 inches)78%extreme
June Weather29°C (84°F)174 mm (6.8 inches)84%extreme
July Weather28°C (83°F)201 mm (7.9 inches)86%extreme
August Weather28°C (83°F)222 mm (8.7 inches)88%extreme
September Weather28°C (83°F)245 mm (9.6 inches)87%extreme
October Weather28°C (82°F)258 mm (10.1 inches)84%extreme
November Weather28°C (82°F)122 mm (4.8 inches)84%extreme
December Weather27°C (81°F)46 mm (1.8 inches)76%very high

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