Climate and monthly weather forecastBanjarmasin, Indonesia
Climate and monthly weather forecast
The climate of Banjarmasin
Banjarmasin, located in Indonesia, experiences Af climate according to the Köppen climate classification. This is the designation for Tropical Rainforest climate, characterized by high temperatures and heavy rainfall year-round. Interestingly, Banjarmasin's geographical position within the equatorial region contributes significantly to these climate attributes.Throughout the year, the city experiences minimal temperature fluctuations with an average of ambient air highs oscillating from 30.8°C (87.4°F) to 33.1°C (91.6°F). Meanwhile, low-temperature averages stay within a range from 23.3°C (73.9°F) to 25.2°C (77.4°F). This indicates a consistently warm temperature regime, with more or less consistent temperature levels, both in daylight and after sunset.
In terms of rainfall, large amounts are observed all year round, ranging from 33mm (1.3") to 257mm (10.12"), emphasizing the tropical humid environment of the region. The city also has a high relative humidity level from 73% to 83%, adding to the overall moist and warm feel. Notable months stand out during this period, such as the drier months from July to September, where there is less rainfall accompanied by fewer rain days.
The sea temperature, fundamental for visitors interested in water activities, varies slightly throughout the year. The range extends from 28.2°C (82.8°F) to 29.8°C (85.6°F), highlighting the overall warm sea temperatures well-suited for comfortable swimming all year round.
Wind speeds in Banjarmasin maintain a steady pace all year, with the highest gusts observed from September to February with a top speed of 12.9km/h (8mph).
The best time to visit Banjarmasin
Due to the consistent weather pattern of Banjarmasin, deciding when to visit boils down to slight weather variances and personal preferences. Nevertheless, if avoiding heavy rainfall while still enjoying warm temperatures is a priority, then the summer months, from July to September, could be ideal. During this period, an average rainfall of around 37mm (1.46") per month is observed compared to a high of 257mm (10.12") in December. There is also a decline in rain days, averaging between 8 and 10.6 days a month, permitting more outdoor activity and exploration opportunities. The sea temperature hovering around a warm 28.5°C (83.3°F) in July, guarantees suitable conditions for water activities.The worst time to visit Banjarmasin
For those who wish to avoid days with heavy rainfall and high humidity, the months of November to January would be less desirable for a visit. In these months, rainfall averages climb to higher totals of 168mm (6.61"), 257mm (10.12") and 199mm (7.83") respectively. Visibly, the weather is dominated by an increase in downpours, which may limit outdoor activities and travel plans. Additionally, unique to this period is an increase in average relative humidity from 78% to 80% and above, potentially adding discomfort due to enhanced moisture.Spring weather in Banjarmasin
In Banjarmasin, variations in weather parameters during spring months are slight. March sees an ambient temperature high of 31°C (87.8°F) and a low of 24.3°C (75.7°F). Similar figures continue into May, though with a slight rise in low temperatures, emphasizing the constant warm climate of the city. March to May also sees a decline in rainfall from an average of 203mm (7.99") to 120mm (4.72"). Daylight and sunshine hours show a subtle decrease from 12.1 hours to 11.9 hours, and 8.5 hours to 7.2 hours, respectively.Summer weather in Banjarmasin
In contrast to many climates globally, the summer period in Banjarmasin, from June to August, offers lower rainfall levels, with figures dropping to 44mm (1.73") in July. This period also sees a decrease in rain days, offering more dry days for outdoor activities. While daytime temperatures remain consistent around 30.8°C (87.4°F), night temperatures show a slight dip to 23.3°C (73.9°F) in June, making summer nights relatively cooler.Autumn weather in Banjarmasin
Autumn introduces an increase in the level of rainfall from 35mm (1.38") in September to 168mm (6.61") by November. This period also sees an increase in the average number of rain days. Ambient temperatures remain fairly constant, while sea temperatures increase slightly, reaching a peak 29.8°C (85.6°F) in November.Winter weather in Banjarmasin
Winter in Banjarmasin is characterized by high rainfall, peaking at 257mm (10.12") in December. The modest decline in temperatures observed during the earlier part of the year becomes obsolete, yet the climate remains warm, with high temperatures averaging around 30.9°C (87.6°F) and lows around 24.9°C (76.8°F). Notably, daylight hours in this period remain relatively constant from 12.3 hours in December, supporting outdoor activities despite the high rainfall levels.Weather in January
January commences the year with moderate warmth and significant rainfall for Banjarmasin, Indonesia, with temperatures mostly ranging from 24.8°C (76.6°F) to 30.8°C (87.4°F). This month sets the pace for an intense humidity and pressure, paving the way for the monsoon season. Weather in January »Weather in February
The climate in Banjarmasin, Indonesia, changes gradually with February displaying a similar pattern to January. There is slightly less rainfall, indicating a gradual shift from the monsoon season; however, this does not significantly alter the high relative humidity levels. Weather in February »Weather in March
March exhibits a minor shift in the overall climate conditions with a further reduction in rainfall. This slight decrease is well accommodated by reduced cloud coverage, which in turn allows more sunlight to penetrate during the day. Weather in March »Weather in April
The weather conditions in April for Banjarmasin, Indonesia, start to present an observable transition from the preceding wet conditions. With the city exiting the monsoon season, less rainfall is recorded, and the high levels of humidity start to retreat. Weather in April »Weather in May
May heralds the warm season in Banjarmasin, Indonesia. This change manifests through appreciable decreases in rainfall and humidity, ushering in a drier season. With the city brave against excessive rains, more sunlight filters through inviting locals and tourists to explore Banjarmasin. Weather in May »Weather in June
June sustains the warmer and drier conditions experienced in May. Reduced relative humidity and rainfall levels mark a great deviation from the initial monsoon season experienced earlier in the year. The reduced cloud cover allows for more considerable sunshine hours, and the sea temperature remains conducive for water activities. Weather in June »Weather in July
Continuing the fine weather trend, July heightens the dry season experienced in Banjarmasin, Indonesia. Drier conditions imply fewer rains, consequently leading to a lower relative humidity level. Despite the high daytime temperatures, the nights experience slightly cooler temperatures. Weather in July »Weather in August
August maintains the dry spell, introducing little changes from July in Banjarmasin, Indonesia. This weather pattern encourages both local and international tourists, taking advantage of the consistent nice weather. The continuously high sea temperatures make it a perfect time to explore the city's clear water attractions. Weather in August »Weather in September
Though September signals the commencement of the gradual return to a wetter season, Banjarmasin, Indonesia, still benefits from the residual warmer weather from August. Slightly increased rainfall does not drastically affect the prevailing favorable weather conditions. Weather in September »Weather in October
October exemplifies a more pronounced transition into the rainy season from the dry spell experienced in Banjarmasin, Indonesia. Slight increases in rainfall and cloud cover become prominent, though temperatures stay relatively constant. Weather in October »Weather in November
November increases the pace to embrace the rainy season in Banjarmasin, Indonesia. Marked increases in the relative humidity and cloud cover become prevalent, indicating a return to the familiar monsoon season. Despite the notable reductions in sunshine hours due to increased rainfall, outdoor activities continue albeit with reduced frequency. Weather in November »Weather in December
Concluding the year, December reinforces the return of monsoon weather for Banjarmasin, Indonesia. Higher rainfall levels accompany humid conditions and lower visibility levels stemming from the high cloud cover percentage. While these characteristics persist from November, the month's temperatures remain fairly stable. Weather in December »Updated: Jan 25, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, June and July, with an average high-temperature of 30.8°C (87.4°F), are the coldest months in Banjarmasin, Indonesia.
Throughout the year, in Banjarmasin, Indonesia, there are 249.1 rainfall days, and 1596mm (62.83") of precipitation is accumulated.
The months with the highest UV index are January through December, with an average maximum UV index of 7.
January through December, with an average maximum UV index of 7, are months with the lowest UV index in Banjarmasin, Indonesia.
March, April, November and December, with an average sea temperature of 29.8°C (85.6°F), are months with the warmest seawater in Banjarmasin, Indonesia.
The months with the highest humidity are April through June, with an average relative humidity of 83%.
June has the shortest days of the year in Banjarmasin, with an average of 11h and 54min of daylight.
August is the month with the least rainfall in Banjarmasin. Rain falls for 8 days and accumulates 33mm (1.3") of precipitation.
The month with the coldest seawater is August, with an average sea temperature of 28.2°C (82.8°F).
September and November, with an average of 9.3h of sunshine, are months with the most sunshine.
With average high and low temperatures of 33.1°C (91.6°F) and 25.1°C (77.2°F) respectively, October is Banjarmasin's warmest month.
With an average relative humidity of 73%, October is the least humid month in Banjarmasin, Indonesia.
December is the month with the most rainfall in Banjarmasin, Indonesia. Rain falls for 29.9 days and accumulates 257mm (10.12") of precipitation.
December has the longest days of the year in Banjarmasin, with an average of 12h and 18min of daylight.
Banjarmasin does not observe Daylight Saving Time (DST). WITA timezone is used throughout the entire year.
With an average of 7h of sunshine, December has the least sunshine of the year in Banjarmasin, Indonesia.
Average temperature
Banjarmasin, Indonesia
The warmest month (with the highest average high temperature) is October (33.1°C).
The months with the lowest average high temperature are January, June and July (30.8°C).
The month with the highest average low temperature is November (25.2°C).
The coldest month (with the lowest average low temperature) is July (23.3°C).
Average pressure
Banjarmasin, Indonesia
- Average pressure in January:
1009.2mbar - Average pressure in February:
1009.5mbar - Average pressure in March:
1009.6mbar - Average pressure in April:
1009.3mbar - Average pressure in May:
1009.2mbar - Average pressure in June:
1009.7mbar
- Average pressure in July:
1010mbar - Average pressure in August:
1010.3mbar - Average pressure in September:
1010.3mbar - Average pressure in October:
1009.7mbar - Average pressure in November:
1008.7mbar - Average pressure in December:
1008.7mbar
The months with the highest atmospheric pressure are August and September (1010.3mbar).
The months with the lowest atmospheric pressure are November and December (1008.7mbar).
Average wind speed
Banjarmasin, Indonesia
- Average wind speed in January:
7km/h - Average wind speed in February:
6km/h - Average wind speed in March:
5.6km/h - Average wind speed in April:
5.5km/h - Average wind speed in May:
6.2km/h - Average wind speed in June:
6.8km/h
- Average wind speed in July:
7.7km/h - Average wind speed in August:
8.7km/h - Average wind speed in September:
9km/h - Average wind speed in October:
7.9km/h - Average wind speed in November:
6km/h - Average wind speed in December:
6.8km/h
The windiest month (with the highest average wind speed) is September (9km/h).
The calmest month (with the lowest average wind speed) is April (5.5km/h).
Average humidity
Banjarmasin, Indonesia
The months with the highest relative humidity are April, May and June (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Banjarmasin, Indonesia
- Average rainfall in January:
199mm - Average rainfall in February:
186mm - Average rainfall in March:
203mm - Average rainfall in April:
186mm - Average rainfall in May:
120mm - Average rainfall in June:
89mm
The wettest month (with the highest rainfall) is December (257mm).
The driest month (with the least rainfall) is August (33mm).
Average rainfall days
Banjarmasin, Indonesia
- Average rainfall days in January:
29 days - Average rainfall days in February:
26.3 days - Average rainfall days in March:
28.7 days - Average rainfall days in April:
25.4 days - Average rainfall days in May:
21.4 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
10.6 days - Average rainfall days in August:
8 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
18.6 days - Average rainfall days in November:
27.1 days - Average rainfall days in December:
29.9 days
The month with the highest number of rainy days is December (29.9 days).
The month with the least rainy days is August (8 days).
Average sea temperature
Banjarmasin, Indonesia
The best months for swimming (with the highest average sea temperature) are March, April, November and December (29.8°C).
The coldest month (with the lowest average sea temperature) is August (28.2°C).
Average daylight / Average sunshine
Banjarmasin, Indonesia
- Average daylight in January:
12h and 18min - Average daylight in February:
12h and 12min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 0min - Average daylight in May:
12h and 0min - Average daylight in June:
11h and 54min
- Average daylight in July:
12h and 0min - Average daylight in August:
12h and 0min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 12min - Average daylight in November:
12h and 18min - Average daylight in December:
12h and 18min
The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 11h and 54min).
- Average sunshine in January:
7h and 12min - Average sunshine in February:
7h and 36min - Average sunshine in March:
7h and 36min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 30min - Average sunshine in June:
8h and 24min
- Average sunshine in July:
8h and 30min - Average sunshine in August:
9h and 0min - Average sunshine in September:
9h and 18min - Average sunshine in October:
9h and 12min - Average sunshine in November:
9h and 18min - Average sunshine in December:
7h and 0min
The months with the most sunshine are September and November (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days
Banjarmasin, Indonesia
- Average sunshine days in January:
1.3 days - Average sunshine days in February:
1.3 days - Average sunshine days in March:
1.7 days - Average sunshine days in April:
3.8 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
14.4 days
- Average sunshine days in July:
20.3 days - Average sunshine days in August:
22.7 days - Average sunshine days in September:
19.6 days - Average sunshine days in October:
11.5 days - Average sunshine days in November:
1.9 days - Average sunshine days in December:
0.7 days
The month with the most sunshine days is August (22.7 days).
The month with the least sunshine days is December (0.7 days).
Average UV index
Banjarmasin, Indonesia
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Banjarmasin, Indonesia
The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility
Banjarmasin, Indonesia
The months with the highest visibility are August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, November and December (9km).
