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Climate · Koh Rong

Koh Rong in September

Hot and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Koh Rong is hot: highs near 86°F, lows near 77°F. Rain falls on almost every day, and the days shorten by 13 minutes from the first week to the last.September in Koh Rong is hot: highs near 30°C, lows near 25°C. Rain falls on almost every day, and the days shorten by 13 minutes from the first week to the last.

High
86°F30°Caverage
Low
77°F25°Caverage
Wet days
7a week · 97% of days
Daylight
12h 10mon average

Is September a good time to visit Koh Rong?

A good month, just outside Koh Rong's most comfortable months, which run from December to January.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 86°F in September, against 86°F to 90°F through the year.Highs near 30°C in September, against 30°C to 32°C through the year.

Chance of a wet day

97% of days in September, against 28% to 98% through the year.

Cloud cover

81% cover in September, against 58% to 82% through the year.

Daylight

12h 10m in September, against 11h 30m to 12h 45m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the most comfortable months. Hover or tap a week for its figures.

Either side

  1. August86°30°low 78°low 26°7 wet days a weekRain on almost every day.
  2. September86°30°low 77°low 25°7 wet days a weekRain on almost every day.
  3. October86°30°low 77°low 25°7 wet days a weekRain on almost every day.

Where Koh Rong sits, in September

Asia/Phnom Penh
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
5:56 AMsets 6:08 PM
Above the sea
0 mlow-lying
Latitude
10.8°Nnorthern hemisphere
Nearest of ours
Krabey Island43 km south-east

The land around Koh Rong, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Cambodia in September

high · low · wet days
See September on the planning mapThe whole year in Koh Rong

Typical weather, averaged over 30 years (1995–2024), read 17 km north of Koh Rong. Its own grid square is mostly sea and holds only a daily average, so the page reads the nearest square with a true high and low near the town's height. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.