Climate averages 1991–2020
Sihanoukville weather
in May.
A hot, very wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Sihanoukville: daytime highs average 29.8°C and nights cool to about 26.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 377 mm of rain on roughly 28 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 36 min on an average May day.
The nearest other city in this atlas is Phú Quốc (64 km away). In May its highs average 28.2°C, 1.6°C cooler than Sihanoukville, with 318 mm of rain.
Among the 8 cities listed in Cambodia, Sihanoukville ranks 8th of 8 for the warmest May highs and 8th of 8 for the driest May (rainfall, lowest first). The mean May high of those 8 cities is 32.9°C; Sihanoukville is 3.1°C cooler than that mean.
From May to June, average highs fall by 1.1°C to 28.8°C, and monthly rainfall rises from 377 mm to 489 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sihanoukville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C24.1°C | 24.1°C | 37 | 9.7 | 11.612 h |
| February | 29.9°C24.5°C | 24.5°C | 30 | 8.3 | 11.812 h |
| March | 30.6°C25.5°C | 25.5°C | 65 | 13.4 | 12.112 h |
| April | 30.9°C26.2°C | 26.2°C | 115 | 19.0 | 12.412 h |
| May, selected | 29.8°C26.1°C | 26.1°C | 377 | 27.9 | 12.613 h |
| June | 28.8°C25.7°C | 25.7°C | 489 | 27.7 | 12.713 h |
| July | 28.3°C25.3°C | 25.3°C | 558 | 29.4 | 12.713 h |
| August | 28.1°C25.3°C | 25.3°C | 556 | 28.9 | 12.512 h |
| September | 28.0°C25.0°C | 25.0°C | 554 | 28.4 | 12.212 h |
| October | 28.5°C24.7°C | 24.7°C | 343 | 27.1 | 11.912 h |
| November | 29.3°C24.9°C | 24.9°C | 104 | 15.4 | 11.612 h |
| December | 29.4°C24.5°C | 24.5°C | 44 | 9.3 | 11.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Phú Quốc in MayVietnam · 64 kmHigh 28.2°C · Low 25.8°C · 318 mm rain
- Hà Tiên in MayVietnam · 108 kmHigh 30.8°C · Low 26.1°C · 182 mm rain
- Takeo in MayCambodia · 144 kmHigh 32.9°C · Low 25.4°C · 147 mm rain
- Tịnh Biên in MayVietnam · 154 kmHigh 32.2°C · Low 25.6°C · 207 mm rain
- Châu Đốc in MayVietnam · 174 kmHigh 32.3°C · Low 25.5°C · 185 mm rain
- Dangkao in MayCambodia · 179 kmHigh 33.5°C · Low 25.8°C · 154 mm rain
- Rạch Giá in MayVietnam · 182 kmHigh 31.1°C · Low 25.9°C · 244 mm rain
- Phnom Penh in MayCambodia · 185 kmHigh 33.6°C · Low 25.9°C · 154 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sihanoukville) is explained once on the Sihanoukville year overview and on the Sources, method and limits page.