Climate Insights for Sinjai

The climate in Sinjai is temperate. The average annual temperature is 12°C and approximately 265mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Sinjai sits near the equator, so seasonal temperature differences are minimal throughout the year. Light snow can occur between January and February.

Temperatures in Sinjai vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is June, when average highs reach 27°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 6°C and an average of 11°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between June and July, with a 8°C shift in average temperatures.

Sinjai is a quite dry location, receiving approximately 265mm of precipitation annually, which averages out to around 22mm 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 July, with just 2mm. That's 31mm less than January, 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. Light snowfall can occur between January and February, totalling around 6cm annually. February is the snowiest month with approximately 4cm.

Sinjai is relatively calm, with an average annual wind speed of 4km/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 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Sinjai, which began on June 21, 2026. Sinjai sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in June at around 27°C, while the coldest stretch bottoms out in January near 6°C. Spring is next, beginning on September 23, 2026 — 16 days from now.

The best time to visit Sinjai is during April, May and June, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 29mm per month. By contrast, January can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Sinjai 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.