Climate Overview
The climate in Phanom Thuan is hot. The average annual temperature is 29°C and approximately 1185mm of precipitation falls per year. September is the wettest month, receiving around 230mm of rainfall. Phanom Thuan 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 21°C.
Temperature
Phanom Thuan sees moderate temperature variation throughout the year, ranging from 21°C to 37°C. April is the hottest month, with daytime highs reaching 37°C and an average of 31°C. January is the coolest month, with minimum temperatures around 21°C and an average of 27°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 2°C shift in average temperatures.
Precipitation
Phanom Thuan is a moderately rainy area, receiving approximately 1185mm of precipitation annually, which averages out to around 99mm per month. The wettest month is September, averaging 230mm of rainfall. October and May also tend to see above-average precipitation. The driest month is December, with just 11mm. That's 220mm 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.
Wind
Phanom Thuan is relatively calm, with an average annual wind speed of 9km/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 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 7km/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.
Seasons
87 days until Winter
It is currently autumn in Phanom Thuan, which began on September 23, 2026. Phanom Thuan 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 April at around 37°C, while the coldest stretch bottoms out in January near 21°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 25 to 37°C. Precipitation is moderate at around 259mm for the season, averaging 86mm per month. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 35°C. Rainfall is heavy, totalling around 375mm across the season with a monthly average of 125mm. Winds are generally light, averaging 10km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 33°C. Rainfall is heavy, totalling around 507mm across the season with a monthly average of 169mm. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 34°C. Precipitation is minimal, with only around 45mm for the entire season. Winds are generally light, averaging 9km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Phanom Thuan 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.
