Everything below is collected in one spot so you do not have to cross-check Banjarmasin climate: monthly averages by hand. The gap between Jul and Oct is 1.5 C here: 27.0 C against 28.5 C. No month dominates: the wettest is Dec at 13.28 mm/day, the driest Aug at 2.48 mm/day. Taken together that is roughly 2,790 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. The table underneath carries the per-month breakdown; the related pages cover the same dataset nearby.
Annual mean temperature 27.7 C
Warmest month Oct (28.5 C)
Coldest month Jul (27.0 C)
Wettest month Dec (13.28 mm/day)
All-time record high 34.1 C
All-time record low 23.1 C
Annual precipitation 2,781 mm / year
Coordinates -3.31987, 114.59075
Population 657,663
Average monthly temperature and rainfall in Banjarmasin
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
27.2
11.28
32.1
24.4
Feb
27.4
12.00
32.0
24.8
Mar
27.6
11.21
31.4
24.5
Apr
28.0
9.06
31.6
25.2
May
28.1
6.44
31.8
24.9
Jun
27.5
5.56
31.1
23.7
Jul
27.0
3.78
31.5
23.5
Aug
27.2
2.48
32.4
23.1
Sep
27.9
2.60
33.3
23.6
Oct
28.5
4.57
34.1
24.5
Nov
28.3
9.52
34.0
25.0
Dec
27.5
13.28
33.1
24.7
What the Banjarmasin climate table shows
Values are multi-decadal climatological averages for the -3.31987, 114.59075 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.
How much rain is 13.28 mm/day in a month?
Rain is recorded as a daily mean, so 13.28 mm/day is roughly 404 mm across a 30-day month.