Weather in Jember

Planning a trip or a stroll around Jember? Check out the latest weather information. Below you will find up-to-date data, forecasts, and useful charts to help ensure your day is comfortable.

Located in Indonesia, Jember features a tropical climate characterised by consistently warm weather throughout the year. The average annual temperature fluctuates within a very narrow range, mostly between 22°C and 25°C, creating comfortable travel conditions at any time. Maximum daytime temperatures almost always hover around 26-28°C, whilst night-time temperatures rarely drop below 19-21°C.

Despite the constant temperatures, Jember has two distinct seasons defined by rainfall levels. The wet season lasts approximately from November to April. This period sees the highest amount of rainfall, and the number of rainy days peaks, particularly in January and March. Conversely, the dry season falls between May and October. July and August are the driest months, when rainfall is minimal and the number of sunny days increases significantly. This makes the summer months the most attractive for those who prefer dry and clear weather.

The climate in Jember is characterised as tropical, with consistently warm weather and insignificant temperature fluctuations throughout the year. The average annual temperature stays within a comfortable range of 22°C to 25°C. July and August are considered the coolest months, when the average temperature drops to 22.4°C–22.6°C. The warmest period occurs from March to April and from November to December, when average values reach 24.6°C, and the daytime maximum in October can rise to 28°C.

Two conditional seasons can be distinguished during the year. The hotter and more humid period, lasting approximately from November to April, features daytime temperatures reaching 27-28°C. During this time, nights also remain very warm, with minimums around 21°C. From May to September, a slightly cooler and drier season sets in. Daytime temperatures in these months average 26-27°C, whilst nights become noticeably fresher — in July and August, the thermometer can drop to 18-19°C, creating a pleasant coolness.

One of the key features of Jember's climate is the noticeable diurnal temperature variation. Despite the stability of monthly averages, the difference between the daytime heat and the night-time coolness can be 6-8 degrees. Days here are always warm and ideal for active leisure, whilst evenings and early mornings bring refreshing coolness, making your stay in the city particularly comfortable.

The climate in Jember follows the classic Indonesian seasonal shift: wet and dry. The clear division between these two periods defines the weather character throughout the year. The rainy season typically begins in November and continues until April, whilst drier and sunnier weather settles in from May to October.

The wet season reaches its peak from December to March. During this time, rainfall is almost a daily occurrence. For instance, March sees an average of 30 rainy days, while January and December see 29 each. The highest amount of rainfall occurs in February. Despite the frequent rains, they usually manifest as short-term tropical downpours, after which the sun often reappears.

The dry season in Jember is most pronounced in July and August. These are considered the driest months, with minimal rainfall (only about 2 mm) and the number of rainy days reducing to 14-15 per month. This does not mean a complete absence of rain, but showers become rare and less intense, making this period the most favourable for travelling and outdoor activities.

When planning a trip to Jember, it is important to choose the right wardrobe to feel comfortable in the local tropical climate. The weather here is consistently warm and humid throughout the year, so the basis of your luggage should be light and breathable clothing made from natural fabrics such as cotton or linen. Do not forget comfortable walking shoes, as exploring the city and its surroundings is best done on foot. High SPF sunscreen, a hat, and sunglasses are mandatory accessories for protection against the active sun at any time of year.

Jember has two clearly defined seasons, which directly affects clothing choices. The rainy season, which lasts roughly from November to April, is characterised by frequent, almost daily rainfall. During this period, you will definitely need a light waterproof jacket or raincoat, as well as a reliable umbrella. Clothing made from quick-drying materials and footwear that can withstand moisture will make your walks in the rain significantly more comfortable. In the drier season, from May to October, rains occur less frequently but are still possible, so a compact umbrella would not go amiss.

Despite the daytime heat, evenings can be slightly cooler, especially after rain. A light jumper, cardigan, or stole will come in handy for evening strolls or for visiting air-conditioned places, such as shopping centres or restaurants. Also, given the humid climate and abundance of greenery, it is worth packing insect repellent to protect yourself from mosquitoes, especially in the evening and when visiting natural attractions.