Climate Overview
The climate in Chiang Khong is cold. The average annual temperature is -48°C and approximately 203mm of precipitation falls per year. August is the wettest month, receiving around 22mm of rainfall. Chiang Khong is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: February, December, March. The coldest months are November, October, December, when temperatures can drop to -55°C. Chiang Khong experiences heavy snowfall, typically from January through December.
Temperature
Chiang Khong sees moderate temperature variation throughout the year, ranging from -55°C to -42°C. February is the warmest month, though highs remain moderate at -42°C with a mean of -47°C. November brings the harshest conditions, with lows dropping to -55°C and an average temperature of -48°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
Chiang Khong is a quite dry location, receiving approximately 203mm of precipitation annually, which averages out to around 17mm per month. The wettest month is August, averaging 22mm of rainfall. September and July also tend to see above-average precipitation. The driest month is January, with just 11mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Chiang Khong receives heavy snowfall, accumulating around 203cm annually from January through December. The snowiest month is August, with approximately 22cm. Winter travel should account for significant snow cover.
Wind
Chiang Khong is relatively calm, with an average annual wind speed of 6km/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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 6km/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
16 days until Autumn
It is currently summer in Chiang Khong, which began on June 21, 2026. Chiang Khong 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 February at around -42°C, while the coldest stretch bottoms out in November near -55°C. Autumn is next, beginning on September 23, 2026 — 16 days from now.
Spring
Temperatures range from -54 to -42°C. Precipitation is minimal, with only around 45mm for the entire season. Winds are generally light, averaging 6km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from -55 to -44°C. Rainfall is relatively light, with around 61mm over the season and a monthly average of 20mm. Winds are generally light, averaging 6km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -55 to -43°C. Rainfall is relatively light, with around 58mm over the season and a monthly average of 19mm. Expect around 58cm of snow accumulation during this period. Winds are generally light, averaging 7km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.
Winter
Temperatures range from -55 to -42°C. Precipitation is minimal, with only around 39mm for the entire season. Expect around 39cm of snow accumulation during this period. Winds are generally light, averaging 6km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Chiang Khong 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.
