May · Cambodia
Best time to visit Sihanoukville in May Weather, crowds & prices
Weather in Sihanoukville in May
Average temperature 29°C, 177 mm of rain, about 20 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
6.3/10
Ranked #6 of 12 months
- Avg temp
- 29°C
- Rainfall
- 177 mm
- Humidity
- 79%
- Days with 6h+ sun
- 20
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in Sihanoukville scores 6.3/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 29°C, 177 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Sihanoukville is Cambodia's beach and ferry hub for the southern islands.
May in Sihanoukville — workable with trade-offs
May averages 29°C (85°F) and humidity near 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 177 mm — wet for this destination — but about 20 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.3/10 here, 6th of 12 months, against 9.8/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with 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.
Flexible dates? February scores 3.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Sihanoukville in May?
- In May, Sihanoukville averages 29°C, 177 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 6.3/10.
- Is May a good time to visit Sihanoukville?
- May earns a 6.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sihanoukville in May?
- Expect about 177 mm of rain in May. Average humidity is 79% and there are about 20 days with 6+ hours of sunshine.
Curated in Sihanoukville
Tickets & experiences
Things to do in Sihanoukville
Sihanoukville, Cambodia. Live activities and tours from GetYourGuide, matched to this destination.