Climate Overview
The climate in Ban Na San is hot. The average annual temperature is 28°C and approximately 2012mm of precipitation falls per year. Ban Na San receives a notable amount of rainfall throughout the year, including during its driest month. 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 23°C to 36°C. April 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 23°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 2012mm of precipitation annually, which averages out to around 168mm per month. The wettest month is October, averaging 312mm of rainfall. November and September also tend to see above-average precipitation. The driest month is February, with just 39mm. That's 273mm 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 mildly breezy, with an average annual wind speed of 12km/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 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Ban Na San, which began on March 20, 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 April at around 36°C, while the coldest stretch bottoms out in February near 23°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 24 to 36°C. Rainfall is heavy, totalling around 408mm across the season with a monthly average of 136mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 33°C. Rainfall is heavy, totalling around 447mm across the season with a monthly average of 149mm. Winds are generally light, averaging 13km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 838mm across the season with a monthly average of 279mm. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 23 to 33°C. Rainfall is heavy, totalling around 319mm across the season with a monthly average of 106mm. Winds are generally light, averaging 14km/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.
