Climate Overview
The climate in Nakhon Sawan is hot. The average annual temperature is 29°C and approximately 1313mm of precipitation falls per year. August is the wettest month, receiving around 265mm of rainfall. Nakhon Sawan 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 21°C.
Temperature
Nakhon Sawan sees moderate temperature variation throughout the year, ranging from 21°C to 38°C. April is the hottest month, with daytime highs reaching 38°C and an average of 32°C. December is the coolest month, with minimum temperatures around 21°C and an average of 26°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
Nakhon Sawan is a fairly wet location, receiving approximately 1313mm of precipitation annually, which averages out to around 109mm per month. The wettest month is August, averaging 265mm of rainfall. September and July also tend to see above-average precipitation. The driest month is December, with just 12mm. That's 253mm less than August, 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
Nakhon Sawan 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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, 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 2km/h gap between the calmest and windiest months.
Seasons
89 days until Autumn
It is currently summer in Nakhon Sawan, which began on June 21, 2026. Nakhon Sawan 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 38°C, while the coldest stretch bottoms out in December near 21°C. Autumn is next, beginning on September 23, 2026 — 89 days from now.
Spring
Temperatures range from 25 to 38°C. Precipitation is moderate at around 191mm for the season, averaging 64mm per month. Winds are generally light, averaging 2km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 26 to 35°C. Rainfall is heavy, totalling around 644mm across the season with a monthly average of 215mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 33°C. Rainfall is heavy, totalling around 429mm across the season with a monthly average of 143mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 35°C. Rainfall is relatively light, with around 49mm over the season and a monthly average of 16mm. 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 Nakhon Sawan 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.
