Banjarmasin, Indonesia climate

As Tropical savanna (dry summer)

Banjarmasin has a remarkably steady tropical climate (Tropical savanna (dry summer), Köppen As). The hottest month is May with an average daily high near 91°F, while the coldest is January averaging around 75°F at night. Precipitation totals about 33 inches a year and is strongly seasonal — July alone averages 8.0 inches while August barely receives 0.17 inches.

☀️ All year

Hot

Daytime highs near 91°F most of the year.

About 172 days a year above 90 °F

🌙 Nights

Stays warm

Even the coolest nights stay near 75°F.

🌧️ Rain

Moderate rainfall

About 33 in of rain a year.

Wettest in July

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

+0.6 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Banjarmasin climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	88	88	89	90	91	90	90	92	93	93	90	89
Avg temp (°F)	81	82	82	83	83	82	81	82	83	83	83	82
Avg low (°F)	75	75	75	75	75	74	73	72	72	74	75	75
Precipitation (in)	6.1	3.1	0.9	3.5	2.2	0.9	8.0	0.2	1.2	0.6	1.6	4.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	88	88	89	90	91	90
Avg temp (°F)	81	82	82	83	83	82
Avg low (°F)	75	75	75	75	75	74
Precipitation (in)	6.1	3.1	0.9	3.5	2.2	0.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	90	92	93	93	90	89
Avg temp (°F)	81	82	83	83	83	82
Avg low (°F)	73	72	72	74	75	75
Precipitation (in)	8.0	0.2	1.2	0.6	1.6	4.8

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	2	2	2	2	1	1	1	0.7	0.8	1	2	3
Days with high ≥ 90°F (days)	8	9	12	15	18	15	15	18	20	19	15	9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	2	2	2	2	1	1
Days with high ≥ 90°F (days)	8	9	12	15	18	15

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	1	0.7	0.8	1	2	3
Days with high ≥ 90°F (days)	15	18	20	19	15	9

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	89	89	82	77	65	60	57	50	56	70	83	90
Clear days (≤ 30% cloud)	0.2	0.3	0.6	0.8	4	6	7	9	7	3	0.4	0.3
Partly cloudy days (30–70%)	3	2	6	9	11	11	12	14	13	10	6	2
Cloudy days (≥ 70%)	28	26	24	20	16	13	12	8	10	18	24	29
Relative humidity (%)	87	86	85	85	86	87	86	83	80	78	81	86
Wind speed (mph)	1.9	1.7	1.5	1.4	1.6	1.8	2.0	2.3	2.3	2.1	1.7	1.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	89	89	82	77	65	60
Clear days (≤ 30% cloud)	0.2	0.3	0.6	0.8	4	6
Partly cloudy days (30–70%)	3	2	6	9	11	11
Cloudy days (≥ 70%)	28	26	24	20	16	13
Relative humidity (%)	87	86	85	85	86	87
Wind speed (mph)	1.9	1.7	1.5	1.4	1.6	1.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	50	56	70	83	90
Clear days (≤ 30% cloud)	7	9	7	3	0.4	0.3
Partly cloudy days (30–70%)	12	14	13	10	6	2
Cloudy days (≥ 70%)	12	8	10	18	24	29
Relative humidity (%)	86	83	80	78	81	86
Wind speed (mph)	2.0	2.3	2.3	2.1	1.7	1.9

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 21 years of daily observations at Syamsudin Noor, a weather station, about 23 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →