Weather in Banjarmasin

Planning a trip or just want to know what to expect from nature? Here you will find the most up-to-date information about the weather in the city of Banjarmasin, including detailed forecasts and visual charts.

The climate of Banjarmasin can be characterised as typical equatorial tropical. Eternal summer reigns here: the weather is hot and humid throughout the year. The temperature patterns are surprisingly stable, with average figures around +27°C…+28°C. During the day, the air usually warms up to +30°C and above, whilst nights bring only slight coolness, rarely dropping below +24°C.

Although the heat persists constantly, the year can be roughly divided into wet and drier seasons. The main rainy period falls between November and April, with December and January being the wettest months, when precipitation can occur almost daily. Showers are often heavy, but the tropical nature of the rain implies that they can end quickly, giving way to the sun.

A relatively dry season occurs from July to September. In August, the number of rainy days drops to a minimum (about 12 days), making this the most favourable time for tourists wishing to explore the city and its famous floating markets. However, even during these months, it is worth being prepared for brief showers, as high humidity is characteristic of the region all year round.

Banjarmasin, located practically on the equator, welcomes travellers with eternal summer. The temperature regime here is distinguished by amazing stability: throughout the year, average figures fluctuate within a minimal range from 27.0°C to 28.2°C. Statistically, the "hottest" months are May and October, when the air warms up the most, whilst July can conditionally be called the "coolest" month of the year, although the difference is barely perceptible to a tourist.

Traditional concepts of "winter" and "summer" in this region of Indonesia are blurred. In the period from June to August, when summer arrives in many countries, Banjarmasin experiences dry and hot weather. Maximum daytime temperatures at this time reach 30-31°C, creating an atmosphere of true tropical heat. The "winter" months (December, January, February) are practically equal in temperature, holding steady at 30°C during the day, however, high humidity and heavy rainfall during this period can intensify the feeling of stuffiness.

Diurnal temperature fluctuations here are moderate, but they bring some relief after the midday heat. If during the day the thermometer confidently stays above 30°C (up to a maximum of 31.5°C in October), then at night the air cools down to a comfortable 24-25°C. Such a temperature drop allows you to enjoy warm evenings without exhausting heat, which is ideal for walks or open-air dining.

The climate in Banjarmasin is typical for the tropics of Indonesia, so precipitation here falls exclusively in the form of rain. The wettest period, which can be called the rainy season, lasts from late autumn to early spring. From November to March, precipitation occurs very frequently: for example, in December and March, up to 29–30 rainy days are recorded, which means a high probability of rain almost daily.

A drier season arrives in the middle of the year, reaching its peak in August, when the number of rainy days decreases to a minimum (about 12 days per month). July and September are also relatively dry months compared to the beginning of the year, offering tourists better chances of clear weather for city walks and river excursions.

In transitional periods, such as April-May and October, the frequency of precipitation changes smoothly. Despite the presence of a distinct rainy season and a dry season, high humidity persists year-round. Tropical downpours can be sudden even in the "dry" months, so a light raincoat or umbrella will become indispensable items in a traveller's luggage.

Banjarmasin is distinguished by a hot equatorial climate with high humidity all year round, so the basis of your wardrobe should consist of light items made from natural fabrics. Cotton, linen, and viscose will allow the skin to breathe at an average temperature of about 27–28°C. Be sure to bring a wide-brimmed hat and high-quality sunglasses, as the sun here is very active even on cloudy days.

Given the large number of rainy days, especially in the period from November to April (when precipitation falls almost daily), a reliable raincoat or a compact umbrella will become your main companions. Footwear should be maximally comfortable for walking and, preferably, quick-drying. Sandals with good support or light trainers are best suited, whilst easily soiled or suede shoes are better left at home due to the risk of sudden downpours and puddles.

Even in the relatively "dry" season (from July to September), rains happen quite often, so a waterproof case for documents and technology will not be amiss. Do not forget sunscreen with a high protection factor (SPF 50+) and insect repellents, as insects can be active in humid weather. It is also recommended to take a light long-sleeved shirt: it will be useful for protection against sunburn during river trips and from air conditioners in shopping centres.