Sihanoukville weather by month & the best time to visit
Cambodia · beach resort · tropical monsoon climate
The best time to visit Sihanoukville is January — its sunniest month (Sunshine Score 87/100), with February and December close behind. Sihanoukville averages about 2,236 hours of sunshine a year. Daytime highs around 29°C / 84°F and roughly 27 mm of rain in January.
When is the best time to visit Sihanoukville?
For sunshine, the best time to visit Sihanoukville is January, then February and December. The dullest month is May (64/100, 248 mm of rain). The full month-by-month picture is in the table below.
How sunny is Sihanoukville?
Sihanoukville gets a moderate 2,236 hours of sunshine a year. January (87/100) is noticeably better than May (64). It ranks #4 of 5 destinations in Cambodia for annual sunshine, below the national median of 2,484 hours. Rain has a clear season: the wettest stretch, around August, carries about 49% of the annual 2,554 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 87 | 29° / 84°F | 24° / 75°F | 27 mm | 9 | 29° / 84°F |
| February | 87 | 30° / 86°F | 25° / 77°F | 24 mm | 11 | 30° / 86°F |
| March | 79 | 31° / 88°F | 26° / 79°F | 72 mm | 11 | 30° / 86°F |
| April | 67 | 31° / 88°F | 27° / 81°F | 134 mm | 11 | 32° / 90°F |
| May | 64 | 30° / 86°F | 28° / 82°F | 248 mm | 10 | 32° / 90°F |
| June | 64 | 29° / 84°F | 27° / 81°F | 380 mm | 9 | 30° / 86°F |
| July | 64 | 29° / 84°F | 27° / 81°F | 444 mm | 8 | 30° / 86°F |
| August | 64 | 28° / 82°F | 27° / 81°F | 373 mm | 9 | 30° / 86°F |
| September | 64 | 28° / 82°F | 26° / 79°F | 426 mm | 9 | 29° / 84°F |
| October | 64 | 29° / 84°F | 26° / 79°F | 253 mm | 9 | 30° / 86°F |
| November | 69 | 29° / 84°F | 26° / 79°F | 125 mm | 9 | 31° / 88°F |
| December | 83 | 29° / 84°F | 25° / 77°F | 48 mm | 9 | 30° / 86°F |
Sea temperature in Sihanoukville by month
The sea off Sihanoukville is warmest in April at around 32°C / 90°F, and coolest in January at 29°C / 84°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Sihanoukville: questions and answers
What kind of destination is Sihanoukville?
Sihanoukville is a beach resort in Cambodia with a tropical monsoon climate — the sea reaches 32°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Sihanoukville get a year?
Sihanoukville gets about 2,236 hours of sunshine a year, at its best around January.
When is the best time to visit Sihanoukville?
The sunniest time to visit Sihanoukville is January, when the Sunshine Score peaks at 87/100 (with February and December close behind). Expect daytime highs around 29°C / 84°F.
What is the least sunny month in Sihanoukville?
May is the least sunny month in Sihanoukville, scoring 64/100 with about 248 mm of rain.
What is the sea temperature in Sihanoukville?
The sea in Sihanoukville ranges from about 29°C (January) to 32°C (April). Month-by-month sea temperatures are on this page.
How strong is the sun in Sihanoukville?
The typical midday UV index in Sihanoukville peaks around 11 (extreme) in February, easing to about 8 (very high) in July. Month-by-month midday UV values are in the UV column of the table on this page.
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