Climate Overview
The climate in Ban Na San is hot. The average annual temperature is 28°C and approximately 2156mm of precipitation falls per year. October is the wettest month, receiving around 342mm of rainfall. Ban Na San sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Ban Na San sees moderate temperature variation throughout the year, ranging from 22°C to 36°C. March is the hottest month, with daytime highs reaching 36°C and an average of 29°C. February is the coolest month, with minimum temperatures around 22°C and an average of 28°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.
Precipitation
Ban Na San is a very wet location, receiving approximately 2156mm of precipitation annually, which averages out to around 180mm per month. The wettest month is October, averaging 342mm of rainfall. November and May also tend to see above-average precipitation. The driest month is February, with just 27mm. That's 316mm 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.
Wind
Ban Na San is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in Ban Na San, which began on June 21, 2026. Ban Na San sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in March at around 36°C, while the coldest stretch bottoms out in February near 22°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 24 to 36°C. Rainfall is heavy, totalling around 445mm across the season with a monthly average of 148mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 503mm across the season with a monthly average of 168mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 820mm across the season with a monthly average of 273mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 33°C. Rainfall is heavy, totalling around 388mm across the season with a monthly average of 129mm. Winds are generally light, averaging 2km/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 Ban Na San 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.
