Climate Insights for Lasem

The climate in Lasem is cool. The average annual temperature is 3°C and approximately 393mm of precipitation falls per year. Lasem receives a notable amount of rainfall throughout the year, including during its driest month. Lasem sits near the equator, so seasonal temperature differences are minimal throughout the year. Lasem experiences heavy snowfall, typically from January through December.

Lasem has relatively stable temperatures year-round, staying within a 8°C range. August is the warmest month, though highs remain moderate at 7°C with a mean of 6°C. The coldest month is December, when overnight lows fall to -1°C and the daily average is 1°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.

Lasem is a quite dry location, receiving approximately 393mm of precipitation annually, which averages out to around 33mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is January, with just 33mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Lasem receives heavy snowfall, accumulating around 262cm annually from January through December. The snowiest month is January, with approximately 33cm. Winter travel should account for significant snow cover.

Lasem is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 12km/h in winter, 13km/h in spring, 15km/h in summer, 16km/h in autumn.

It is currently winter in Lasem, which began on June 21, 2026. Lasem sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in August at around 7°C, while the coldest stretch bottoms out in December near -1°C. Spring is next, beginning on September 23, 2026 — 22 days from now.

The table below shows monthly climate averages for Lasem 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.