Cambodia Weather and Seasons: When to Visit and How to Handle Heat and Rain

Prepared by the NovAsia Editorial Team

Cambodia’s climate is often summarised as “hot all year”, but that description is not useful enough for someone planning a trip, relocation or long-term life. What matters is the combination of temperature, humidity, rainfall, housing quality, air conditioning and the way weather affects transport and everyday tasks.

A forecast showing 32°C can feel very different in January and April. A tropical downpour may mean only a wet road in one part of Phnom Penh and difficult access, standing water or damp inside the apartment in another.

The practical question is therefore not simply “When is the best time to visit Cambodia?” It is also:

• When is it easiest to explore neighbourhoods?
• When is the heat most demanding?
• What changes during the rainy season?
• How should housing be checked?
• Which climate conditions affect health and daily routine?

This article gives general climate and lifestyle information. Anyone with a medical condition affected by heat, humidity or air quality should seek individual medical advice.

Cambodia’s main seasons

For everyday planning, Cambodia is commonly divided into three broad periods:

1. A relatively cooler and drier season.
2. A hot dry season.
3. A wet monsoon season.

A useful approximate calendar is:

• November to February: generally the most comfortable period;
• March to May: the hottest part of the year;
• May or June to October: the rainy season;
• August to October: often the wettest and most humid period.

These boundaries are not exact. Rain may begin earlier or later, and individual weeks may differ sharply from the seasonal pattern. The broad framework is still useful because it explains changes in electricity use, outdoor activity, mould risk, traffic and the practical quality of housing.

Why temperature alone is misleading

Daily high temperatures may appear similar across the year. The difference is created by several factors:

• humidity;
• solar intensity;
• cloud cover;
• night-time cooling;
• wind;
• heat stored by roads and buildings;
• the design of the apartment or house.

A 33°C afternoon in January may be followed by a more comfortable evening. In April, walls, glass and roads may remain hot for longer, while nights offer less relief.

For long-term life, three questions are more useful than the forecast maximum:

1. Can the home remain comfortable without excessive air-conditioning cost?
2. Can you travel and complete ordinary tasks during the day?
3. Does the property cope with humidity and heavy rain?

A short holiday in a well-cooled hotel may not answer any of them.

November to February: the most comfortable period

For many visitors and new residents, November through February is the easiest time for a first trip, neighbourhood research and apartment viewings.

Typical advantages include:

• less frequent rain;
• somewhat more comfortable mornings and evenings;
• lower risk of persistent indoor damp;
• easier walking and travel;
• more predictable sightseeing and intercity journeys.

Phnom Penh often makes its most favourable first impression during these months. It is easier to visit multiple areas, walk for longer and handle practical appointments.

This is still a tropical climate. Daytime heat remains normal, and sun protection, drinking water and air conditioning are still part of daily life. “Cool season” is a relative term, not a promise of mild European weather.

This period is particularly convenient for:

• a first exploratory visit;
• families with children;
• comparing neighbourhoods and housing;
• people uncertain about heat tolerance;
• longer trips within Cambodia.

The limitation is that a December visit does not reveal how the same apartment performs in April or September.

March to May: peak heat

Many newcomers expect the wet season to be the hardest part of the year. In practice, the late dry-season heat can be more demanding.

Common experiences include:

• heavy heat from early in the day;
• greater fatigue during short journeys;
• air conditioning running for longer;
• poorer sleep in weakly cooled rooms;
• reduced appetite for outdoor activity;
• higher electricity use;
• more difficulty for children and older adults during afternoon activities.

Housing quality becomes particularly obvious. An apartment may be uncomfortable if it has:

• extensive west-facing glass;
• inadequate external shading;
• weak or poorly maintained air conditioning;
• poor cross-ventilation;
• a top-floor roof above it;
• windows that leak hot air;
• bedrooms that remain warm after sunset.

A home that felt comfortable in December may be expensive and difficult to cool in April.

How peak heat changes the day

Residents often adapt by:

• moving errands to the morning;
• exercising before sunrise or later in the evening;
• reducing long outdoor activity at midday;
• using delivery more often;
• allowing children more recovery time after school;
• planning breaks in air-conditioned places;
• drinking more regularly rather than waiting for thirst.

For remote workers, reliable cooling becomes part of the working environment rather than a luxury.

May to October: the rainy season

The most common misconception is that rain falls continuously all day for half the year. Many wet-season days still include long dry periods. A typical pattern may involve a hot or bright morning followed by a strong shower later in the day or at night.

The season often feels like this:

• high heat and humidity continue;
• showers become more frequent;
• some rain is intense but relatively short;
• transport is less predictable;
• local drainage matters more;
• indoor damp and drying become everyday issues.

Life does not stop. People continue working, attending school, shopping and exercising. The city simply requires more weather-aware planning.

Everyday changes

Residents may need to:

• check rain forecasts before crossing the city;
• allow additional time for cars and deliveries;
• keep rain protection for phones and documents;
• dry shoes and clothing more carefully;
• use air conditioning or a dehumidifier to control humidity;
• inspect bathrooms, cupboards and window seals more often.

A well-managed apartment in a well-drained location can remain comfortable throughout the season. A damp property on a poorly drained street can become a persistent problem.

August to October: the wettest part of the year

The later wet-season months often expose weaknesses in buildings and neighbourhoods.

Residents may notice:

• mould in bathrooms, wardrobes or behind furniture;
• musty smells;
• balcony drainage problems;
• water around entrances and roads;
• longer drying times for clothes and shoes;
• leakage around windows or external walls;
• greater dependence on taxis and delivery.

Some defects only become visible after repeated rain. A unit may reveal a weak window seal, slow balcony drain or inadequate bathroom ventilation after several humid weeks.

For tenants and buyers, this is why questions about mould, leakage and local flooding belong in a normal property inspection.

Month-by-month practical guide

January

Usually one of the most comfortable months. Good for exploring neighbourhoods, travelling and handling practical relocation tasks.

February

Still relatively comfortable, although daytime heat begins to build.

March

The hotter period becomes more noticeable. Midday activity requires more planning.

April

Often one of the most demanding months. Housing, sleep, air conditioning and hydration matter greatly.

May

Heat remains strong while more regular rain begins to appear.

June

The wet season is established, although many days still contain long usable dry periods.

July

Humidity increases and transport becomes more weather-dependent.

August

Damp, mould and building maintenance become more important.

September

Often one of the months when humidity and repeated rain are most noticeable.

October

Wet conditions may continue, with a gradual transition towards the drier season.

November

Conditions often become more comfortable and predictable.

December

Commonly one of the easiest months for travel, walking and relocation research.

These are broad patterns rather than a guarantee for a particular year or location.

Climate should influence the housing decision

Cambodia’s weather quickly reveals whether an apartment is well chosen.

During the hot season, inspect

• air-conditioner capacity and maintenance;
• window orientation;
• external shading and balcony depth;
• the temperature of glass and walls in late afternoon;
• curtain quality;
• roof exposure;
• bedroom cooling and overnight noise;
• the electricity tariff.

During the rainy season, inspect

• mould and damp smells;
• repaired or stained window edges;
• bathroom ventilation;
• balcony drainage;
• swollen flooring or skirting;
• silicone and external seals;
• water history in the entrance and parking areas;
• the building’s response after power cuts.

Useful questions include:

• Has this apartment had mould?
• Have the windows or balcony leaked?
• How often are air conditioners cleaned?
• Does water collect outside the building?
• How do residents dry laundry in the wettest months?

These are normal due-diligence questions in a tropical climate.

Weather and utility costs

Electricity is usually the largest climate-related household cost. Consumption rises with hotter weather, poor building design and long daily use of air conditioning.

Major factors include:

• working from home;
• old or inefficient units;
• western exposure;
• extensive glazing;
• a large apartment;
• weak shading or insulation;
• setting the thermostat unnecessarily low;
• cooling empty rooms.

Wet-season electricity use may also remain high because air conditioning is used to remove moisture, not only to lower temperature.

Other seasonal expenses can include:

• air-conditioner cleaning;
• mould treatment;
• a dehumidifier;
• drying services;
• replacement of items damaged by humidity;
• additional transport during heavy rain.

Before renting, confirm whether electricity is billed directly by the utility or resold by the building at another rate.

Sleep and adaptation

Many difficulties attributed to “the climate” are actually problems with the bedroom.

Check whether:

• the room reaches a comfortable temperature before sleep;
• the air conditioner is quiet;
• airflow does not blow directly onto the bed;
• humidity is controlled;
• backup power is reliable;
• road or equipment noise continues at night.

Good sleep makes tropical adaptation much easier. A noisy or overheated bedroom can cause fatigue, irritability and reduced tolerance for ordinary tasks.

Heat and health

High heat and humidity can increase the risk of dehydration, heat exhaustion and heat-related illness. Risk is higher for young children, older adults, pregnant people, outdoor workers and people with some chronic conditions or medicines.

Practical measures include:

• scheduling strenuous activity outside peak heat;
• drinking regularly;
• using shade and breathable clothing;
• allowing gradual acclimatisation;
• never leaving a child or animal in a parked vehicle;
• recognising concerning symptoms such as confusion, fainting, severe weakness or very high body temperature.

Seek urgent medical help for severe symptoms. Individual hydration and medication advice should come from a qualified clinician, especially for people with heart, kidney or endocrine conditions.

Children, sport and outdoor time

Families often shift their routine after moving:

• play and walking happen early or later in the day;
• playgrounds are chosen for shade;
• organised sport is moved indoors or away from peak heat;
• water and rest breaks become standard;
• outdoor sessions may be cancelled for lightning, heavy rain or poor air quality.

Children may not recognise overheating early. Adults should provide water and rest rather than relying only on the child to ask.

In the wet season, road conditions and cancellation policies become part of the after-school schedule.

Mould and indoor humidity

Humidity is less visually obvious than heat and is frequently underestimated.

Mould is more likely where there is:

• weak ventilation;
• repeated condensation;
• leakage;
• furniture pressed against damp walls;
• full wardrobes with little airflow;
• unclean air-conditioner filters;
• clothes that never dry fully.

A useful wet-season routine includes:

• using dry mode or controlled cooling;
• leaving space around furniture;
• opening cupboards periodically;
• drying towels promptly;
• cleaning bathroom surfaces and air-conditioner filters;
• checking behind wardrobes and near windows;
• addressing a leak rather than covering it with new paint.

People with asthma, allergies or mould sensitivity should take visible damp and musty odours seriously and seek medical guidance for persistent symptoms.

Rain, flooding and transport

The inconvenience of rain often comes from its effect on streets rather than from getting wet.

Before choosing housing, check:

• whether the street holds water;
• whether taxis can reach the entrance;
• whether the car park or ramp is vulnerable;
• whether the pavement remains passable;
• how quickly drainage clears;
• whether there is a covered pickup point;
• whether an alternative route exists.

Do not assume that a high-floor apartment removes flood risk. Water can affect access, lifts, pumps, parking and electrical systems.

During heavy rain, avoid entering water when the road surface and depth are unclear. Floodwater may conceal holes, drains, debris and electrical hazards.

When is the best time for a first visit?

For most people, November to February is the easiest period for a first visit. Walking, property viewings and intercity travel are generally more comfortable.

The drawback is that the city is being assessed under favourable conditions. Someone considering relocation should still ask how the neighbourhood and apartment perform in April and during the wettest months.

A second visit in a more difficult season is particularly valuable for anyone uncertain about heat, humidity, mould or flooding.

When is the best time to move with a family?

The relatively cooler dry season often makes early adaptation easier. It gives families more comfortable conditions for apartment hunting, school setup and learning the area.

In practice, work, school calendars, visas and leases may determine the date.

Preparation matters more than achieving the perfect month.

If moving in March to May, prioritise:

• reliable air conditioning;
• shaded housing;
• realistic daytime routines;
• hydration and sleep.

If moving during the wet season, prioritise:

• drainage and access;
• mould and leakage checks;
• drying arrangements;
• rain-aware transport;
• protection for documents, electronics and shoes.

Common newcomer mistakes

Frequent mistakes include:

• treating the year as one unchanging hot season;
• visiting only in December and assuming conditions are always similar;
• choosing housing from photographs without checking sun and damp;
• believing the wet season means nonstop rain all day;
• failing to ask about leakage, mould and local flooding;
• underestimating sleep quality;
• keeping a temperate-climate schedule during peak heat;
• ignoring weather when planning children’s activities and transport;
• focusing on daily temperature while ignoring humidity and night-time cooling.

Conclusion

Cambodia has three practical climate phases: the relatively more comfortable dry period from approximately November to February, the intense heat of March to May and the wet season from around May or June to October, with August to October often the dampest part.

Long-term comfort depends on much more than the temperature forecast. Housing design, air conditioning, humidity control, drainage, transport and the ability to adjust daily routines all matter.

For a first trip, the cooler dry period is usually easiest. For a serious relocation decision, remember that April and the late wet season reveal the country’s more demanding side. A good apartment and realistic routine make the climate substantially easier. Weak housing and unrealistic expectations do the opposite.

Sources

1. World Meteorological Organization — Cambodia climate and regional weather context; reviewed 25 June 2026.
2. Ministry of Water Resources and Meteorology of Cambodia — official seasonal forecasts and weather information; reviewed 25 June 2026.
3. World Bank Climate Change Knowledge Portal — Cambodia climate data and seasonal patterns; reviewed 25 June 2026.
4. Food and Agriculture Organization of the United Nations — Cambodia climate profile and monsoon seasonality; reviewed 25 June 2026.
5. World Health Organization Cambodia and UNICEF Cambodia — heat, weather and health-risk information; reviewed 25 June 2026.

Frequently asked

When is Cambodia’s wettest period?

The heaviest and most persistent wet-season conditions often occur from roughly August to October, although timing and rainfall vary by year and region.

Can you live comfortably in Phnom Penh during the rainy season?

Yes, but housing and location matter. Residents need to plan for intense showers, localised flooding, humidity, mould and slower transport.

When is Cambodia hottest?

March, April and early May are usually the most difficult months for heat. Reliable air conditioning, hydration and a heat-aware daily schedule become especially important.