Koh Kong weather in May

In May, Koh Kong sees average daytime highs of 29°C and overnight lows near 26°C, with 363 mm of rain across 29 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 4% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of May to 12 h 36 min by month's end. Set against the rest of the year, May is Koh Kong's 8th-clearest and 5th-windiest month. For the whole year in context, see Koh Kong's year-round climate.

Daytime high
29°
5th warmest
Overnight low
26°
12th coldest
Rainfall
363 mm
29 wet days
Daylight
12 h 30 min
5:48 AM – 6:20 PM
Cloud cover
85%
8th clearest
Wind
8 km/h
5th windiest
Solar energy
4.95 kWh/m²
Travel score
2.9
out of 10

Koh Kong is capital in the eponymous province of Cambodia.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical May day in Koh Kong reaches about 29°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926
312926

How May really feels in Koh Kong

Once humidity and wind are folded in, May averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Koh Kong weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°40811.45.6
Feb29° / 24°4610.111.65.4
Mar30° / 25°10418.411.94.3
Apr30° / 25°14423.112.33.4
May29° / 26°3632912.52.9
Jun29° / 25°51528.912.73.0
Jul28° / 25°61430.112.63.2
Aug28° / 25°59630.312.43.2
Sep28° / 25°52029.312.13.2
Oct29° / 25°31026.711.73.4
Nov30° / 25°8213.911.54.5
Dec30° / 24°316.711.35.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 8% of May, with mostly cloudy or overcast conditions the remaining 87%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22575
32476
42476
52278
62080
72080
81882
91783
101783
111585
121585
131288
141288
151189
16991
17991
18991
19892
20793
21793
22793
23793
24793
25793
26694
27694
28694
29694
30694
31694

Chance of precipitation in May

Any precipitation

Koh Kong gets around 363 mm of rain over 29 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 94% and peaks near 98% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
187
287
387
488
588
689
789
890
991
1091
1192
1292
1393
1494
1595
1695
1796
1896
1997
2097
2197
2298
2398
2498
2597
2697
2797
2897
2997
3096
3196

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the miserable band about 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1991
2892
3793
4793
5793
6694
7694
8694
9694
10694
11694
12793
13793
14793
15793
16793
17793
18793
19793
20694
21694
22694
23694
24595
25595
26595
27496
28496
29496
30496
31496

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 24 min at the start of May to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:53 AM to 5:47 AM, and sunset from 6:17 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:536:17
212.45:536:18
312.45:526:18
412.45:526:18
512.45:526:18
612.55:516:18
712.55:516:18
812.55:506:19
912.55:506:19
1012.55:506:19
1112.55:506:19
1212.55:496:19
1312.55:496:20
1412.55:496:20
1512.55:496:20
1612.55:486:20
1712.55:486:21
1812.55:486:21
1912.65:486:21
2012.65:486:21
2112.65:476:22
2212.65:476:22
2312.65:476:22
2412.65:476:22
2512.65:476:23
2612.65:476:23
2712.65:476:23
2812.65:476:23
2912.65:476:24
3012.65:476:24
3112.65:476:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.95 kWh/m².

For context, solar energy here swings from a low near 4.01 kWh/m² to a high of 5.9 kWh/m² in April across the year — May's 4.95 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in May

Hazard calendar for Koh Kong

In seasonPeak

In May, Koh Kong sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Koh Kong sits in the Pacific typhoon belt; the season peaks July–October.

Koh Kong's monsoon runs May–October, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Koh Kong?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.9
Sightseeing
12th-best month of the year
3.8
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Koh Kong.

What to pack for Koh Kong in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Koh Kong sees daytime highs around 29°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Koh Kong in May

The nearest coast averages about 31°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 31°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Koh Kong in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koh Kong peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 18UV 14Dec 13UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Koh Kong in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Koh Kong is worst in February — around 24 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodFeb 1523 µg/m³Nov 129 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb24Moderate
Mar19Moderate
Apr16Moderate
May12Moderate
Jun12Good
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov9Good
Dec11Good
Location & terrain

Where is Koh Kong?

Koh Kong sits at 11.6°N, 103.0°E, 5 m above sea level, in Cambodia. The nearest listed city is Smach Mean Chey, 10 km away.

TratKo ChangLaem NgopKhao SamingSihanoukvilleLaem Sing

Topography around Koh Kong

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koh Kong.

Within 3 km, the terrain around Koh Kong has only modest variations in elevation — a maximum elevation change of 20 m around an average of 3 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 488 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,727 m.

The land around Koh Kong is covered by water (36%) and grassland (28%) within 3 km, water (40%) and trees (39%) within 16 km, and trees (51%) and water (43%) within 80 km.

3 km
20 m
16 km
488 m
80 km
1,727 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
May weather nearby: Smach Mean Chey 10 km · Khlong Yai 21 km · Trat 86 km · Ko Chang 88 km · Laem Ngop 89 km · Khao Saming 102 km · Sihanoukville 127 km · Laem Sing 138 km

Cambodia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / C / G
230 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,872
2025
Happiness
4.5 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
1.8
per 100k, 2011
Road deaths
19.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 390
Religion
Buddhist 97%Muslim 2%other 1%Christian 0%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Koh Kong (11.6153°, 102.9838°, elevation 5 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).