Loa Janan climate

Name: Loa Janan
Address: ID

Loa Janan is warmest in October, with average highs of 31 °C, and coldest in January, when nights average 23 °C. April is the wettest month (301 mm) and August the driest (164 mm). Figures are 1991–2020 climate normals.

Across a full year Loa Janan averages 2,917 mm of rain and 365 days above 25 °C.

Indonesia · population 212,816 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month October 31 °C
Coldest month January 23 °C
Driest month August 164 mm
Wettest month April 301 mm
Least cloud August 73 % cloud
Hottest on record August 37 °C
Coldest on record July 20 °C

What to expectLoa Janan through the year

Loa Janan changes little through the year. Average daily highs stay between 30 and 31 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 365 days a year reach 25 °C, 194 of them reach 30 °C. The warmest reading in the 1991–2020 record is 37 °C, in August.

Rain is spread fairly evenly through the year, from 164 mm in August to 301 mm in April. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.8 °C	271 mm	93 %
February	30.0 °C	242 mm	90 %
March	30.2 °C	298 mm	88 %
April	30.2 °C	301 mm	89 %
May	30.0 °C	256 mm	84 %
June	29.6 °C	221 mm	80 %
July	29.4 °C	182 mm	77 %
August	30.0 °C	164 mm	73 %
September	30.6 °C	166 mm	76 %
October	30.6 °C	228 mm	86 %
November	30.1 °C	288 mm	92 %
December	29.8 °C	301 mm	95 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.8 °C	23.3 °C	25.8 °C	32.9 °C	21.7 °C	31	14
February	30.0 °C	23.4 °C	25.9 °C	35.6 °C	21.7 °C	28	15
March	30.2 °C	23.5 °C	26.1 °C	36.0 °C	22.2 °C	31	18
April	30.2 °C	23.7 °C	26.2 °C	35.7 °C	21.9 °C	30	18
May	30.0 °C	23.9 °C	26.2 °C	36.2 °C	22.5 °C	31	17
June	29.6 °C	23.6 °C	25.9 °C	33.4 °C	21.8 °C	30	13
July	29.4 °C	23.4 °C	25.8 °C	32.6 °C	20.1 °C	31	11
August	30.0 °C	23.5 °C	26.0 °C	37.3 °C	21.8 °C	31	15
September	30.6 °C	23.6 °C	26.4 °C	35.4 °C	21.8 °C	30	21
October	30.6 °C	23.6 °C	26.4 °C	34.8 °C	22.0 °C	31	22
November	30.1 °C	23.5 °C	26.0 °C	33.4 °C	22.3 °C	30	17
December	29.8 °C	23.5 °C	25.8 °C	33.5 °C	22.0 °C	31	14

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	271 mm	26	12 h/day	93 %	89 %	8.1 km/h
February	242 mm	23	12 h/day	90 %	89 %	8.5 km/h
March	298 mm	27	12 h/day	88 %	89 %	8.2 km/h
April	301 mm	28	12 h/day	89 %	90 %	7.4 km/h
May	256 mm	29	12 h/day	84 %	91 %	7.3 km/h
June	221 mm	26	12 h/day	80 %	90 %	7.7 km/h
July	182 mm	24	12 h/day	77 %	88 %	8.8 km/h
August	164 mm	21	12 h/day	73 %	86 %	9.6 km/h
September	166 mm	21	12 h/day	76 %	85 %	9.2 km/h
October	228 mm	26	12 h/day	86 %	87 %	8.5 km/h
November	288 mm	29	12 h/day	92 %	90 %	7.6 km/h
December	301 mm	29	12 h/day	95 %	91 %	7.9 km/h

How Loa Janan compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Loa Janan	31 °C	23 °C	2,917 mm	365
Samarinda · Indonesia	31 °C	23 °C	2,992 mm	365
Balikpapan · Indonesia	29 °C	24 °C	2,499 mm	365
Bontang · Indonesia	30 °C	24 °C	2,776 mm	365
Palu · Indonesia	31 °C	24 °C	3,588 mm	365
Palangkaraya · Indonesia	32 °C	23 °C	2,670 mm	365
Banjarbaru · Indonesia	32 °C	23 °C	2,622 mm	365

Where Loa Janan ranks

Ranking	Position	Value
The warmest places in Asia in December	49th of 50	30 °C

Planning a trip? See the best time to visit Loa Janan.

QuestionsCommon questions about Loa Janan’s climate

When is the best time to visit Loa Janan?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, July, December sit closest to 20 °C on average, October is the warmest month and August the driest. The month-by-month table above has the full picture.

How hot does Loa Janan get?

In October, the warmest month, daily highs average 31 °C. About 194 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average 23 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Loa Janan?

April, averaging 301 mm over 28 days with rain. The driest month is August with 164 mm. The year as a whole averages 2,917 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Loa Janan rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: -0.583°, 117.095° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.