Peak in April
Coolest in December
Heavy in September
Peak in dry season
Phnom Penh Monthly Weather Guide
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January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for Phnom Penh
Currency
KHR
៛ Cambodian riel
Language
Khmer
Driving
Right side
Connect
Cheap SIM cards from US$2 for GSM phones...
Safety
High Safety
GPI: 1.882
Best Time to Visit Phnom Penh
Location, climate overview & historical trends
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📍 11.5564° N, 104.9282° E
Open in Google MapsPhnom Penh is a prominent destination in Cambodia.
Located at 11.56°N latitude,Phnom Penh experiences a tropical climate with warm temperatures year-round.
Based on 30 years of data, April is the warmest month (avg. 35°C), while December is the coolest. September sees the most rain (81% chance), making January the driest month.
Best Time to Visit
NASA POWER Data (1991-2021)December
Best months to visit
32°C
Avg High
Based on 30 years of NASA satellite data,Phnom Penh receives approximately 1,213mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
32°
2024 Avg
32°
2040 Proj
32.4°
+-0.01°C
per decade (observed)
+0.25°C
per decade (CMIP6)
🌡️ Phnom Penh has warmed by +-0.0°C since 1995. By 2040, an additional +0.4°C is projected (based on CMIP6 rate of 0.246°C/decade), for a total of +0.4°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
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Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Chikungunya
All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.
Hepatitis A
Recommended for unvaccinated travelers one year old or older going to Cambodia.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Cambodia. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Cambodia.
Japanese Encephalitis
Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.
Malaria
CDC recommends that travelers going to certain areas of Cambodia take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasPrimarily isolated to pockets in rural and forested areasRare cases in non-forested areasNo (or negligible) malaria transmission in the cities of Phnom Penh (the capital) and Siem ReapNo (or negligible) malaria transmission at the main temple complex at Angkor WatDrug resistanceChloroquine and mefloquineSpeciesP. vivax(95%)P. falciparum(5%)P. malariaeandP. knowlesi6(rare)Recommended chemoprophylaxisRural and forested areas: Atovaquone-proguanil, doxycycline, primaquine5, tafenoquine2Areas with rare cases: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes
+4 more
Source: CDC Travelers' Health
View Complete Health GuidePhnom Penh Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 32°C | 4% | 🔥 Hot |
| February | 33°C | 5% | 🔥 Hot |
| March | 34°C | 12% | 🔥 Hot |
| April | 35°C | 34% | 🔥 Hot |
| May | 33°C | 62% | 🌧️ Rainy |
| June | 32°C | 63% | 🌧️ Rainy |
| July | 32°C | 64% | 🌧️ Rainy |
| August | 32°C | 68% | 🌧️ Rainy |
| September | 31°C | 81% | 🌧️ Rainy |
| October | 31°C | 72% | 🌧️ Rainy |
| November | 30°C | 35% | Neutral |
| December | 30°C | 11% | 😊 Pleasant |
Weather in Cities Near Phnom Penh
Explore climate data for popular destinations within easy reach
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Compare weather conditions with nearby destinations for your trip planning
Compare Phnom Penh Weather vs Popular Destinations
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These destinations share similar weather patterns with Phnom Penh. Perfect alternatives if you're looking for the same climate in a different location.
Phnom Penh Weather FAQ
When is the best time to visit Phnom Penh?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, December are usually great choices.
When is the hottest month in Phnom Penh?
April is historically the hottest month in Phnom Penh with average highs of 35°C.
When does it rain the most in Phnom Penh?
September typically sees the highest probability of rain (81%).
Is Phnom Penh expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.