Climate Overview
The climate in Lan Sak is hot. The average annual temperature is 27°C and approximately 1340mm of precipitation falls per year. September is the wettest month, receiving around 239mm of rainfall. Lan Sak 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 December, January, February, when temperatures can drop to 19°C.
Temperature
Lan Sak sees moderate temperature variation throughout the year, ranging from 19°C to 37°C. April is the hottest month, with daytime highs reaching 37°C and an average of 30°C. December is the coolest month, with minimum temperatures around 19°C and an average of 24°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.
Precipitation
Lan Sak is a fairly wet location, receiving approximately 1340mm of precipitation annually, which averages out to around 112mm per month. The wettest month is September, averaging 239mm of rainfall. August and October also tend to see above-average precipitation. The driest month is February, with just 12mm. That's 227mm 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
Lan Sak 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 April, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
91 days until Autumn
It is currently summer in Lan Sak, which began on June 21, 2026. Lan Sak 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 December near 19°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.
Spring
Temperatures range from 22 to 37°C. Precipitation is moderate at around 240mm for the season, averaging 80mm per month. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 34°C. Rainfall is heavy, totalling around 547mm across the season with a monthly average of 182mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 32°C. Rainfall is heavy, totalling around 487mm across the season with a monthly average of 162mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 19 to 33°C. Rainfall is relatively light, with around 66mm over the season and a monthly average of 22mm. Winds are generally light, averaging 2km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Lan Sak is during January and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 27mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 37°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Lan Sak 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.
