Sihanoukville Temperature by Month

The average annual maximum temperature in Sihanoukville, Preah Sihanouk Province, Cambodia is 30°C (86°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Sihanoukville compares to cities worldwide.

With minimal seasonal shifts, Sihanoukville experiences a constant climate year-round. Maximum daytime temperatures range from a very warm 31°C (88°F) in April to a comfortable 29°C (84°F) in September. At night, temperatures range from 27°C (81°F) in April to 25°C (77°F) in September.

The chart below illustrates the average maximum day and minimum night temperatures in Sihanoukville by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. April, the warmest month of the year, receives 250 hours of sunshine.

The chart below shows the average temperature throughout the year:

Sihanoukville's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Sihanoukville's weather, including monthly rainfall, sunshine hours, and humidity, visit our Sihanoukville climate page.