Loa Janan weather in January

In January, Loa Janan sees average daytime highs of 31°C and overnight lows near 23°C, with 275 mm of rain across 26.3 wet days and about 12 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 2% of the time in January, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of January to 12 hours by month's end. Set against the rest of the year, January is Loa Janan's 11th-clearest and 6th-windiest month. For the whole year in context, see Loa Janan's year-round climate.

Daytime high
31°
10th warmest
Overnight low
23°
4th coldest
Rainfall
275 mm
26.3 wet days
Daylight
12 hours
6:20 AM – 6:22 PM
Cloud cover
92%
11th clearest
Wind
5 km/h
6th windiest
Solar energy
4.66 kWh/m²
Travel score
2.6
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in Loa Janan reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How January really feels in Loa Janan

Once humidity and wind are folded in, January averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Loa Janan weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°27526.3122.6
Feb31° / 24°24223.5122.7
Mar31° / 24°29926.9122.5
Apr31° / 24°30727.5122.4
May31° / 24°25628.7122.4
Jun31° / 24°21425.7122.8
Jul31° / 23°17823.7123.1
Aug31° / 23°15921.2123.2
Sep32° / 23°16720.8123.0
Oct32° / 24°23326122.5
Nov31° / 24°29428.5122.3
Dec31° / 24°29828.9122.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 3% of January, with mostly cloudy or overcast conditions the remaining 96%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1397
2397
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14496
15496
16496
17595
18595
19595
20595
21595
22595
23595
24694
25694
26694
27694
28694
29694
30694
31694

Chance of precipitation in January

Any precipitation

Loa Janan gets around 275 mm of rain over 26.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
190
290
389
489
589
688
788
888
987
1087
1187
1286
1386
1486
1586
1685
1785
1885
1985
2084
2184
2284
2384
2484
2584
2684
2784
2884
2984
3084
3184

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the miserable band about 64% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12674
22773
32971
43070
53169
63169
73268
83367
93466
103565
113664
123664
133763
143763
153862
163862
173862
183961
193961
203961
213961
223961
233862
243862
253862
263862
273862
283862
293763
303763
313763

Wind in January

Winds average 5 km/h in January.

Across January, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 hours at the start of January to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over January. Sunrise moves from 6:14 AM to 6:24 AM, and sunset from 6:16 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:146:16
212.06:146:16
312.06:156:17
412.06:156:17
512.06:166:18
612.06:166:18
712.06:166:18
812.06:176:19
912.06:176:19
1012.06:186:20
1112.06:186:20
1212.06:186:20
1312.06:196:21
1412.06:196:21
1512.06:206:21
1612.06:206:22
1712.06:206:22
1812.06:216:22
1912.06:216:23
2012.06:216:23
2112.06:226:23
2212.06:226:24
2312.06:226:24
2412.06:236:24
2512.06:236:24
2612.06:236:25
2712.06:236:25
2812.06:246:25
2912.06:246:25
3012.06:246:26
3112.06:246:26

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.66 kWh/m².

For context, solar energy here swings from a low near 4.42 kWh/m² to a high of 5.34 kWh/m² in September across the year — January's 4.66 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in January

Is January a good time to visit Loa Janan?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.6
Sightseeing
6th-best month of the year
3.9
Beach & pool
7th-best month of the year

January is a weaker month for outdoor sightseeing in Loa Janan.

What to pack for Loa Janan in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Loa Janan sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Loa Janan in January

The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in May at about 30°C and coldest in February near 29°C.

The water stays above 20°C all year — warm enough for a swim any month.

28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Loa Janan in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Loa Janan peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 11 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 12UV 15Jul 10UV 11
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov13Extreme
Dec12Extreme

Air quality in Loa Janan in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Loa Janan is worst in October — around 28 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (March, 14 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateOct 1427 µg/m³Mar 1314 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar14Moderate
Apr15Moderate
May14Moderate
Jun15Moderate
Jul15Moderate
Aug16Moderate
Sep23Moderate
Oct28Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Loa Janan?

Loa Janan sits at 0.6°S, 117.1°E, 9 m above sea level, in Indonesia. The nearest listed city is Samarinda, 12 km away.

AmuntaiBarabaiPalu

Topography around Loa Janan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Loa Janan.

Within 3 km, the terrain around Loa Janan has only modest variations in elevation — a maximum elevation change of 131 m around an average of 25 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 264 m; within 80 km, large variations in elevation — a maximum elevation change of 806 m.

The land around Loa Janan is covered by trees (60%) within 3 km, trees (66%) within 16 km, and trees (58%) and water (30%) within 80 km.

3 km
131 m
16 km
264 m
80 km
806 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
January weather nearby: Samarinda 12 km · Balikpapan 82 km · Bontang 91 km · Muara Teweh 248 km · Tanjung 258 km · Amuntai 289 km · Barabai 293 km · Palu 311 km

Indonesia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,060
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
0.3
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 471
Religion
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Loa Janan (-0.5829°, 117.095°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).