The average temperature for the week of 16 June 2025 - 22 June 2025 was 30 °C (86 °F) during the day and 27 °C (81 °F) during the night. These temperatures are roughly same as the long-time average for Koh Rong, being 31 °C (88 °F) for daily temperatures and 24 °C (75 °F) for night temperatures. The average temperatures observed during different times of day (based on local time) were as below: 7am 28 °C (82 °F), 10am 29 °C (84 °F), 1pm 29 °C (84 °F), 4pm 29 °C (84 °F), 7pm 28 °C (82 °F), 10pm 28 °C (82 °F).

The week had 2 days without rain, 2 days with light rain, 2 days with moderate rain and 1 day with heavy rain. The total precipitation for the week in Koh Rong was 61 mm (2.40 in), which is below the area's average of 133 mm (5.24 in). The average cloud coverage during the daytime (from dawn to dusk) was 98 %.

Average speed of wind was 7.1 m/s. The most common wind direction(s) were West and North-West. The air pressure was 1006 hpa - 1011 hpa. On average, the air humidity in Koh Rong was 81 %.

During the daytime (from dawn to dusk), there were in average: 11.5 hours overcast skies and 2.5 hours rainy weather. On average, the time of sunrise was 05:45, and the time of sunset was 18:30.

Weather overview

Koh Rong, located in the heart of Cambodia, is blessed with a tropical climate, offering a range of temperatures that vary throughout the year. Visitors can experience day temperatures oscillating between a mild 30 °C (86 °F) in the cooler months to a warm 32 °C (90 °F) peak in the warmer months. Sea temperatures invite swimmers with a spectrum from a refreshing 28 °C (82 °F) to a balmy 30 °C (86 °F). The driest month, January, sees a mere 4 days of rainfall, whereas the wettest month, August, can expect up to 24 days of rain. Nighttime brings cooler air, with temperatures ranging from 22 °C (71 °F) to 25 °C (76 °F), offering relief from the daytime heat.

January weather

The tourist season is nearing its zenith in Koh Rong. The frequency of rainy days and the volume of rainfall plummet to a low, registering at 18 mm (0.70 in). The sea temperature reaches its minimum of 28 °C (82 °F), and the nocturnal temperature drops to its lowest too in January. During this period, the wind speed peaks, reaching 3.

February weather

In February, Koh Rong's tourist season is in full swing, with the dry weather persisting. Daytime temperatures begin their gradual ascent, now reaching about 31 °C (88 °F), and the temperature at night starts to increase. A slight uptick in rainy days can be seen this month. Coinciding with this, the sun's presence is at its strongest with around 8 hours of clear skies each day.

March weather

March signals the looming end of the tourist season in Koh Rong, manifested by the increased sea temperature, now averaging 29 °C (84 °F). Concurrently, there's a noticeable rise in the daytime temperature. The quantity of rainy days inflates, now totaling 8 days of rain, and there is a discernible increase in rainfall volume as well.

April weather

April is marked by the apex of daytime heat in Koh Rong, hitting a peak at 32 °C (90 °F), while the sea temperature also ascends, now 30 °C (86 °F). The tourist season continues during this time. An upward trend in rainy days is also observed, mirroring the increase observed in the previous month.

May weather

As May rolls in, Koh Rong begins to experience the onset of the wet season. Rainy days are becoming more frequent, and the volume of rainfall rises accordingly. The sea temperature reaches its annual peak during this time.

June weather

June in Koh Rong is characterized by the continuing wet season, with a slight downturn in daytime temperatures. The sea temperature also starts to decrease, and the number of rainy days further elevates.

July weather

With July's arrival, the day temperature maintains its downward trajectory in Koh Rong. The wet season persists, and the highest amount of rainfall for the year can be observed during this month.

August weather

The wet season is at its height in Koh Rong during August, with the day temperature reaching its lowest point of the year. Additionally, this month sees the apex in the number of rainy days, but a slight decline in rainfall volume commences.

September weather

As the calendar turns to September, the decline of the rainy season becomes apparent in Koh Rong, although the number of rainy days and the amount of rainfall are still high. The days are the least sunny during this month.

October weather

October witnesses a continuation of the wet season's downturn in Koh Rong. The frequency of rainy days and rainfall volume continue their descent. Additionally, this month experiences an increase in sunny hours.

November weather

The number of rainy days keeps diminishing in Koh Rong during November, with a parallel reduction in rainfall. The tourist season discreetly commences, accompanied by a rise in sunny hours.

December weather

December sees the continuation of the tourist season in Koh Rong, as the dry season begins to establish itself. The decline in rainfall persists, and sunny hours continue to climb. A drop in night temperature can be felt.

What type of weather can be expected in Koh Rong during January?

January is an excellent time to visit Koh Rong as the weather is ideal, with daytime temperatures averaging 30 °C (87 °F), sea temperatures at a comfortable 28 °C (82 °F), and nighttime temperatures resting at a cozy 22 °C (71 °F). Minimal rainfall with only 4 days of rain per month ensures ample opportunity for uninterrupted outdoor activities.

As February arrives, how does the climate in Koh Rong change?

February in Koh Rong greets visitors with slightly warmer weather, as both day and night temperatures start to climb, and a marginal increase in rainy days is noted. However, the sunny hours peak, which promises plenty of time for sun-seekers to enjoy the daylight.

Does March see a significant change in the weather patterns of Koh Rong?

In March, Koh Rong undergoes a visible transition with the sea and daytime temperatures on the rise. The increase in rainfall marks a shift in weather patterns, hinting at the approaching wet season.

What is characteristic of Koh Rong's climate in April?

April features the year's highest daytime temperatures in Koh Rong, coupled with rising sea temperatures, making it a hot spot for tourists seeking warmth. This month also continues the trend of increasing rainfall.

In May, how does the onset of the wet season affect the climate of Koh Rong?

The climate of Koh Rong in May is significantly influenced by the commencement of the wet season, which brings about increased rainy days and higher rainfall amounts, while the sea temperature is at its warmest.

How does the weather evolve in Koh Rong as June progresses?

The progression into June marks a continued presence of the wet season in Koh Rong, accompanied by a reduction in both sea and daytime temperatures, while rainy days become even more prevalent.

What alterations in the climate are observed in Koh Rong during July?

Koh Rong in July exhibits a downward trend in day temperatures as the wet season remains, and it is this month that features the zenith of annual rainfall.

What weather conditions dominate Koh Rong in August?

August in Koh Rong is dominated by wet season conditions, with the lowest daytime temperatures of the year, an abundance of rainy days, although a slight decrease in overall rainfall amount is also seen.

What is the general state of the wet season in Koh Rong during September?

September marks the gradual retreat of the wet season in Koh Rong, with a subtle reduction in rainy days and rainfall amounts, and a low number of sunny hours further characterizes the month.

Is October's climate in Koh Rong a significant shift from the wetter months?

In October, Koh Rong transitions further away from the wetter months, evidenced by decreased rainy days and rainfall, while sunnier hours begin to paint the daily canvas.

Does November signal the end of the wet season in Koh Rong?

November in Koh Rong indicates a winding down of the wet season, with rain becoming less frequent and a notable increase in sunny hours marking the prelude to a tourist-friendly period.

How does Koh Rong's climate transition with the arrival of December?

With December's arrival, Koh Rong transitions into the dry season, bringing extended sunny hours, dwindling rainfall, and the commencement of cooler nights, setting the stage for a welcoming tourist season.