Climate Insights for Khe Sanh

The climate in Khe Sanh is warm and mild. The average annual temperature is 24°C and approximately 1866mm of precipitation falls per year. Khe Sanh receives a notable amount of rainfall throughout the year, including during its driest month. Khe Sanh is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, June, April. The coldest months are January, February, December, when temperatures can drop to 16°C.

Khe Sanh sees moderate temperature variation throughout the year, ranging from 16°C to 31°C. The warmest month is May, when average highs reach 31°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 16°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.

Khe Sanh is a fairly wet location, receiving approximately 1866mm of precipitation annually, which averages out to around 155mm per month. The wettest month is October, averaging 356mm of rainfall. September and July also tend to see above-average precipitation. The driest month is February, with just 42mm. That's 313mm less than October, 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.

Khe Sanh is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months.

It is currently spring in Khe Sanh, which began on March 20, 2026. Khe Sanh is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 31°C, while the coldest stretch bottoms out in January near 16°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Khe Sanh is during January, February and March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 50mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Khe Sanh 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.