Climate Insights for Jember

The climate in Jember is hot. The average annual temperature is 25°C and approximately 2382mm of precipitation falls per year. Jember receives a notable amount of rainfall throughout the year, including during its driest month. Jember sits near the equator, so seasonal temperature differences are minimal throughout the year.

Jember has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is April, when average highs reach 30°C and the mean temperature sits around 27°C. August is the coolest month, with minimum temperatures around 21°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.

Jember is a very wet location, receiving approximately 2382mm of precipitation annually, which averages out to around 199mm per month. The wettest month is November, averaging 367mm of rainfall. February and January also tend to see above-average precipitation. The driest month is August, with just 52mm. That's 315mm less than November, 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.

Jember is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, 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 1km/h gap between the calmest and windiest months.

It is currently winter in Jember, which began on June 21, 2026. Jember sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in April at around 30°C, while the coldest stretch bottoms out in August near 21°C. Spring is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Jember is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 63mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 30°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Jember 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.