Is It Monsoon in Koh Kong, Cambodia? Rainfall and Weather by Month

Koh Kong, Cambodia JANUARY
27°
★★★
Peak season
22° to 32°
Dry & Comfortable
One of the driest, coolest months of the year.
☀️ Sunscreen✨ Best sightseeing weather
28°
★★★
Peak season
23° to 32°
Dry & Sunny
Still part of the best window, warming up gradually.
☀️ Sunscreen✨ Best sightseeing weather
29°
★★★
Shoulder season
24° to 33°
Heat Builds
Comparatively dry still, with rain starting to tick up ahead of the wet season.
🥵 Heat protection☀️ Sunscreen
29°
★★★
Shoulder season
25° to 33°
Hottest Month
The hottest month of the year on average, with rain building steadily.
🥵 Heat protection☔ Light rain jacket
29°
★★★
Shoulder season
25° to 33°
Monsoon Arrives
Rain increases sharply as the wet season sets in for good.
☔ Umbrella essential🥵 Heat protection
28°
★★★
Off-peak season
24° to 32°
Exceptionally Wet
Rain falls almost daily now, among the wettest months of the year.
☔ Heavy rain gear⚠️ Flash-flood aware
28°
★★★
Shoulder season
24° to 31°
Exceptionally Wet
Still exceptionally wet, with rain a near-daily fixture.
☔ Heavy rain gear⚠️ Flash-flood aware
28°
★★★
Off-peak season
24° to 31°
Wettest Month
The rainiest month of the year by a wide margin, with rain almost every day.
☔ Heavy rain gear⚠️ Flash-flood aware
28°
★★★
Off-peak season
24° to 31°
Still Exceptionally Wet
Still part of the near-daily rain stretch, easing only slightly from August.
☔ Heavy rain gear⚠️ Flash-flood aware
28°
★★★
Shoulder season
24° to 32°
Rain Eases
Rain eases noticeably from the peak of the wet season, though still substantial.
☔ Heavy rain gear⚠️ Flash-flood aware
28°
★★★
Shoulder season
23° to 32°
Monsoon Withdraws
Rain drops off sharply as the monsoon retreats and the dry season approaches.
☔ Umbrella handy🌀 Late typhoon possible
28°
★★★
Peak season
22° to 32°
Driest Month
The driest month of the year, part of the best window, though an occasional typhoon can still affect the first half.
☀️ Sunscreen✨ Best sightseeing weather
Drag through the year Jan
⭐️
Jan
⭐️
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
⭐️
Dec
This month
Rainfall
41 mm
4 rainy days this month
Sunshine
8 hrs/day
62% of daylight hours
Humidity
76%
Air feels heavy and sticky
Wind
12 km/h
Light, barely noticeable
Rainfall
66 mm
6 rainy days this month
Sunshine
8 hrs/day
62% of daylight hours
Humidity
73%
Air feels heavy and sticky
Wind
12 km/h
Light, barely noticeable
Rainfall
104 mm
8 rainy days this month
Sunshine
8 hrs/day
62% of daylight hours
Humidity
72%
Air feels heavy and sticky
Wind
13 km/h
Light, barely noticeable
Rainfall
135 mm
11 rainy days this month
Sunshine
8 hrs/day
62% of daylight hours
Humidity
74%
Air feels heavy and sticky
Wind
12 km/h
Light, barely noticeable
Rainfall
376 mm
20 rainy days this month
Sunshine
6.5 hrs/day
50% of daylight hours
Humidity
75%
Air feels heavy and sticky
Wind
14 km/h
Light, barely noticeable
Rainfall
780 mm
24 rainy days this month
Sunshine
5 hrs/day
38% of daylight hours
Humidity
79%
Air feels heavy and sticky
Wind
18 km/h
Noticeable breeze
Rainfall
744 mm
24 rainy days this month
Sunshine
5 hrs/day
38% of daylight hours
Humidity
81%
Air feels heavy and sticky
Wind
19 km/h
Noticeable breeze
Rainfall
985 mm
26 rainy days this month
Sunshine
4.5 hrs/day
35% of daylight hours
Humidity
80%
Air feels heavy and sticky
Wind
19 km/h
Noticeable breeze
Rainfall
640 mm
23 rainy days this month
Sunshine
4.5 hrs/day
35% of daylight hours
Humidity
81%
Air feels heavy and sticky
Wind
17 km/h
Noticeable breeze
Rainfall
345 mm
19 rainy days this month
Sunshine
5.5 hrs/day
42% of daylight hours
Humidity
82%
Air feels heavy and sticky
Wind
13 km/h
Light, barely noticeable
Rainfall
119 mm
10 rainy days this month
Sunshine
7 hrs/day
54% of daylight hours
Humidity
83%
Air feels heavy and sticky
Wind
14 km/h
Light, barely noticeable
Rainfall
36 mm
4 rainy days this month
Sunshine
8 hrs/day
62% of daylight hours
Humidity
79%
Air feels heavy and sticky
Wind
14 km/h
Light, barely noticeable
★★★ peak season, ★★☆ decent shoulder months, ★☆☆ true off-peak, based on rain frequency, heat, and haze.
Seasons at a glance
🌟
Peak season: Jan, Feb, Dec
Koh Kong's dry season and the best time for a visit. December through February is historically the coolest, driest stretch, before the region's exceptionally heavy rains return.
🌤️
Shoulder season: Mar, Apr, May, Jul, Oct, Nov
This tier spans March through May, plus October and November, as rain builds toward its peak and eases again once the monsoon withdraws.
☔
Off-peak season: Jun, Aug, Sep
Koh Kong's exceptionally wet stretch. June through September brings rain that falls almost daily, with August historically the wettest month by a wide margin.
Good to know
🌧️
Among the rainiest places in Cambodia
This stretch of coast, facing directly into the monsoon flow, receives more than 4,000mm of rain a year, far above the 1,300 to 1,800mm typical of Cambodia's inland cities.
⛰️
Gateway to the Cardamom Mountains
Cambodia's highest range, topped by Phnom Aural at 1,800 meters, rises inland from Koh Kong, its slopes covered in dense, protected forest.
💦
Waterfalls are a short trip away
Tatai waterfall, reached by boat along the Tatai River, is a popular day trip from Koh Kong, especially dramatic during the rainy season.
🇹🇭
A short distance from the Thai border
Koh Kong sits near the Hat Lek border crossing into Thailand, making it a common overland route between the two countries.
🌀
Typhoons are rare but can still affect Cambodia
Typhoons usually pass north into Vietnam and Laos, weakened by the time they might reach Cambodia. When they do occur, it is generally from mid-October to mid-November, with a peak in early November.
Top attractions
1
Tatai Waterfall
A wide, jungle-framed waterfall reached by boat along the Tatai River, most dramatic during the rainy season.
2
Cardamom Mountains
Cambodia's highest and wildest mountain range, cloaked in dense rainforest and protected as a nature reserve.
3
Koh Kong Island
A largely undeveloped island off the coast, known for quiet beaches and mangrove-lined waterways.
Frequently asked questions
When is monsoon season in Koh Kong?›
Koh Kong's rainy season historically runs from May to mid-November, with rain falling almost daily from June through September, and August the wettest month.
What is the best time of year to visit Koh Kong?›
December through February is historically Koh Kong's coolest, driest stretch, and the best time for a visit.
What is the least favorable time to visit Koh Kong?›
June through September is historically the wettest stretch of the year, with rain falling almost daily.
Which month has the most rain in Koh Kong?›
August is historically the wettest month, averaging around 985mm of rain.
Which month is the driest in Koh Kong?›
December is historically the driest month, averaging around 36mm of rain.
How hot does Koh Kong get?›
April is historically the hottest month of the year on average.
What should I pack for Koh Kong during the rainy season?›
Heavy rain gear is worth packing from June through September, when this stretch of coast sees some of the heaviest rainfall in Cambodia.
Why is Koh Kong so much rainier than Phnom Penh?›
Koh Kong's coast faces directly into the monsoon flow coming off the Gulf of Thailand, exposing it to far heavier rain than Cambodia's inland cities.
Are the Cardamom Mountains near Koh Kong?›
Yes. Cambodia's highest range, topped by Phnom Aural at 1,800 meters, rises inland from Koh Kong.
Do typhoons affect Koh Kong?›
Rarely, and usually weakened. Typhoons typically pass north into Vietnam and Laos, though Cambodia can occasionally be affected from mid-October to mid-November, with a peak in early November.