Sihanoukville climate — normals and trends
Sihanoukville (Cambodia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 3,380 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (28.1 °C on average) and the coldest is January (26.5 °C). Rainfall peaks in August.
Sihanoukville averages 0 frost days, 19 hot days (≥ 30 °C) and 256 rainy days per year.
Sihanoukville has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.7 °C (on 7 May 1998) and the coldest 21.0 °C (on 23 December 1999).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
SihanoukvillePreah Sihanouk
- coords
- 10.61°, 103.53°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
28.3°C
Average daily low
26.0°C
Annual rainfall
3,380mm
Sunshine / day
10.0h
Mean relative humidity
80%
Average peak wind
19.6km/h
Seasonal range
1.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
19 d/yr
Rainy days (≥ 1 mm)
256 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.1 °C
Average feels-like low
29.4 °C
Average peak gust
30.1 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.55 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.7 °C
7 May 1998
Coldest day
21.0 °C
23 December 1999
Wettest day
140 mm
5 September 1940
Windiest day
63.8 km/h
4 October 1960
Strongest gust
82.4 km/h
3 November 1997
Hottest feels-like
41.3 °C
3 May 2024
Coldest feels-like
18.6 °C
16 January 1967
Sunniest day
12.3 h
13 July 1951
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.4 °C | +0.6 °C | 9 mm | -27 mm |
| Feb | 28.3 °C | +0.2 °C | 84 mm | +43 mm |
| Mar | 29.4 °C | +0.7 °C | 70 mm | +3 mm |
| Apr | 29.3 °C | 0.0 °C | 169 mm | +42 mm |
| May | 29.3 °C | +0.2 °C | 377 mm | +3 mm |
| Jun | 28.8 °C | +0.2 °C | 542 mm | +20 mm |
| Jul | 28.7 °C | +0.6 °C | 396 mm | -158 mm |
| Aug | 28.3 °C | +0.4 °C | 562 mm | -22 mm |
| Sep | 28.1 °C | +0.5 °C | 542 mm | -25 mm |
| Oct | 28.3 °C | +0.5 °C | 227 mm | -120 mm |
| Nov | 28.0 °C | -0.4 °C | 176 mm | +56 mm |
| Dec | 28.7 °C | +0.4 °C | 16 mm | -26 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Sihanoukville?
Sihanoukville has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 3,380 mm of precipitation per year.
What is the hottest day ever recorded in Sihanoukville?
The hottest day measured in Sihanoukville between 1940 and 2025 was 7 May 1998, reaching 32.7 °C.
What is the coldest day in Sihanoukville?
The coldest day measured in Sihanoukville between 1940 and 2025 was 23 December 1999, at 21.0 °C.
Does it snow in Sihanoukville?
Almost never: Sihanoukville sees virtually no snow, with about 0 frost days per year.
Has the climate of Sihanoukville warmed?
Yes: Sihanoukville warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sihanoukville?
The wettest day measured in Sihanoukville between 1940 and 2025 was 5 September 1940, with 140 mm of rain in 24 hours.
What was the windiest day in Sihanoukville?
The windiest day measured in Sihanoukville between 1940 and 2025 was 4 October 1960, with winds reaching 63.8 km/h.
What is the warmest month in Sihanoukville?
The warmest month in Sihanoukville is April (28.1 °C on average); the coldest is January (26.5 °C).
How much does it rain in Sihanoukville?
Sihanoukville receives on average 3,380 mm of precipitation per year, spread over about 256 rainy days.
Is it sunny in Sihanoukville?
Sihanoukville gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Sihanoukville?
Yes: Sihanoukville has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sihanoukville?
In Sihanoukville, between 1940 and 2025, the highest apparent temperature reached 41.3 °C on 3 May 2024, and the lowest was 18.6 °C on 16 January 1967.
Compare Sihanoukville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sihanoukville