Climate Insights for Phnom Penh

The climate in Phnom Penh is hot. The average annual temperature is 29°C and approximately 1,500 mm of precipitation falls per year. September is the wettest month, receiving around 262 mm of rainfall. Phnom Penh is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are January, December, February, when temperatures can drop to 23°C.The climate in Phnom Penh is hot. The average annual temperature is 84°F and approximately 59.1 in of precipitation falls per year. September is the wettest month, receiving around 10.3 in of rainfall. Phnom Penh is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, March, May. The coldest months are January, December, February, when temperatures can drop to 74°F.

Phnom Penh sees moderate temperature variation throughout the year, ranging from 23°C to 36°C. April is the hottest month, with daytime highs reaching 36°C and an average of 31°C. January is the coolest month, with minimum temperatures around 23°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.Phnom Penh sees moderate temperature variation throughout the year, ranging from 74°F to 97°F. April is the hottest month, with daytime highs reaching 97°F and an average of 87°F. January is the coolest month, with minimum temperatures around 74°F and an average of 81°F. Daily temperature variation is modest, with an average difference of 14°F between highs and lows.

Phnom Penh is a fairly wet location, receiving approximately 1,500 mm of precipitation annually, which averages out to around 125 mm per month. The wettest month is September, averaging 262 mm of rainfall. October and July also tend to see above-average precipitation. The driest month is February, with just 14 mm. That's 248 mm less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.Phnom Penh is a fairly wet location, receiving approximately 59.1 in of precipitation annually, which averages out to around 4.9 in per month. The wettest month is September, averaging 10.3 in of rainfall. October and July also tend to see above-average precipitation. The driest month is February, with just 0.6 in. That's 9.8 in less than September, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Phnom Penh is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months.Phnom Penh is mildly breezy, with an average annual wind speed of 5mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is December, averaging 6mph, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 4mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2mph gap between the calmest and windiest months.

The table below shows monthly climate averages for Phnom Penh based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Phnom Penh based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.