May · Cambodia
Best time to visit Phnom Penh in May Weather, crowds & prices
Weather in Phnom Penh in May
Average temperature 29°C, 250 mm of rain, about 29 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
2.9/10
Ranked #12 of 12 months
- Avg temp
- 29°C
- Rainfall
- 250 mm
- Humidity
- 80%
- Days with 6h+ sun
- 29
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in Phnom Penh scores 2.9/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 29°C, 250 mm of rain, and roughly 29 days with 6+ hours of sunshine this month.
Phnom Penh pairs royal palaces and a riverfront with sobering museums of the Khmer Rouge years.
May in Phnom Penh: expect compromises
May averages 29°C (84°F) and humidity near 80%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
250 mm makes this the wettest stretch of the year, though about 29 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 2.9/10 here, 12th of 12 months, against 8.1/10 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.
Figure on low-season pricing, with crowds are light for this destination.
Flexible dates? January scores 5.2 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Phnom Penh in May?
- In May, Phnom Penh averages 29°C, 250 mm of rain, and about 29 days with 6+ hours of sunshine. Its climate-comfort score is 2.9/10.
- Is May a good time to visit Phnom Penh?
- May earns a 2.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Phnom Penh in May?
- Expect about 250 mm of rain in May. Average humidity is 80% and there are about 29 days with 6+ hours of sunshine.
Curated in Phnom Penh
Tickets & experiences
Things to do in Phnom Penh
Phnom Penh, Cambodia. Live activities and tours from GetYourGuide, matched to this destination.