January in Sihanoukville — the year's strongest window
Best window · 9.6/10January averages 27°C (80°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 19 mm of rain — occasional showers rather than washed-out days — alongside about 21 sunny days and 11.4 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Sihanoukville at 9.6/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
February in Sihanoukville — the year's strongest window
Best window · 9.8/10February averages 28°C (82°F) with humidity around 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 32 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 11.7 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Sihanoukville at 9.8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
March in Sihanoukville — the year's strongest window
Best window · 9/10March averages 28°C (83°F) with humidity around 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 56 mm, so plan one flexible day in three; you still get about 28 sunny days and 11.9 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Sihanoukville at 9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
April in Sihanoukville — reliably good (5th best month)
Good · 8.3/10April averages 29°C (85°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 83 mm, so plan one flexible day in three; you still get about 26 sunny days and 12.2 hours of daylight.
It scores 8.3/10 here, 5th of 12 months, against 9.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
If your dates are flexible, February is materially better in Sihanoukville — 1.5 points higher on the same scale.
May in Sihanoukville — workable with trade-offs
Trade-offs · 6.3/10May averages 29°C (85°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 177 mm this is a genuinely wet month: about 20 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.3/10 here, 6th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 3.5 points higher on the same scale.
June in Sihanoukville — workable with trade-offs
Trade-offs · 5.6/10June averages 29°C (83°F) with humidity around 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
227 mm of rain puts this in monsoon territory — about 17 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.6/10 here, 9th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 4.2 points higher on the same scale.
July in Sihanoukville — the hardest end of the year
Hardest · 4.8/10July averages 28°C (82°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
452 mm of rain puts this in monsoon territory — about 12 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.8/10 here, 11th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 5 points higher on the same scale.
August in Sihanoukville — workable with trade-offs
Trade-offs · 5.5/10August averages 28°C (82°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
272 mm of rain puts this in monsoon territory — about 18 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.5/10 here, 10th of 12 months, against 9.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 4.3 points higher on the same scale.
September in Sihanoukville — the hardest end of the year
Hardest · 4.8/10September averages 28°C (82°F) with humidity around 86%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
464 mm of rain puts this in monsoon territory — about 12 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.8/10 here, 12th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 5 points higher on the same scale.
October in Sihanoukville — workable with trade-offs
Trade-offs · 5.7/10October averages 28°C (82°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
263 mm of rain puts this in monsoon territory — about 20 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.7/10 here, 8th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 4.1 points higher on the same scale.
November in Sihanoukville — workable with trade-offs
Trade-offs · 6.3/10November averages 27°C (81°F) with humidity around 84%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 164 mm this is a genuinely wet month: about 20 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.3/10 here, 7th of 12 months, against 9.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Sihanoukville — 3.5 points higher on the same scale.
December in Sihanoukville — the year's strongest window
Best window · 9/10December averages 26°C (80°F) with humidity around 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 46 mm, so plan one flexible day in three; you still get about 20 sunny days and 11.4 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Sihanoukville at 9/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
