Tanjung Selor weather in December

In December, Tanjung Selor sees average daytime highs of 31°C and overnight lows near 23°C, with 309 mm of rain across 29.2 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 2nd-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 1% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of December to 11 h 48 min by month's end. Set against the rest of the year, December is Tanjung Selor's 12th-clearest and 8th-windiest month. For the whole year in context, see Tanjung Selor's year-round climate.

Daytime high
31°
10th warmest
Overnight low
23°
8th coldest
Rainfall
309 mm
29.2 wet days
Daylight
11 h 48 min
6:12 AM – 6:02 PM
Cloud cover
90%
12th clearest
Wind
4 km/h
8th windiest
Solar energy
4.3 kWh/m²
Travel score
2.5
out of 10

Tanjung Selor is capital of Bulungan Regency and North Kalimantan Province, Indonesia.

Density
53/km²
people per km²
Founded
1790

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

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

A typical December day in Tanjung Selor 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 28°C and 32°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Tanjung Selor

Once humidity and wind are folded in, December 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Tanjung Selor weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°27927.111.92.9
Feb30° / 23°20924.311.92.8
Mar31° / 23°25428122.6
Apr31° / 23°25627.412.12.5
May31° / 23°29029.512.12.4
Jun31° / 23°25126.512.22.6
Jul31° / 23°22026.712.12.7
Aug31° / 23°22026.412.12.6
Sep32° / 23°25327.2122.4
Oct31° / 23°29428.811.92.4
Nov31° / 23°31329.211.92.4
Dec31° / 23°30929.211.82.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of December, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2496
3496
4496
5496
6496
7595
8595
9595
10595
11595
12595
13595
14595
15595
16595
17595
18595
19595
20595
21595
22595
23595
24496
25595
26595
27595
28496
29496
30595
31694

Chance of precipitation in December

Any precipitation

Tanjung Selor gets around 309 mm of rain over 29.2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 94% and peaks near 96% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
196
296
396
496
595
695
795
895
995
1095
1195
1295
1395
1495
1595
1695
1795
1895
1994
2094
2194
2294
2393
2493
2592
2692
2792
2891
2991
3090
3190

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
105050
205050
305050
405050
505050
605050
705050
805050
905050
1005050
1105050
1205050
1305149
1405149
1505248
1605248
1705347
1805446
1905446
2005545
2105644
2205743
2305743
2405842
2505941
2606040
2706139
2816138
2916336
3016435
3116633

Wind in December

Winds average 4 km/h in December.

Across December, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 48 min at the start of December to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:05 AM to 6:19 AM, and sunset from 5:56 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:055:56
211.86:055:56
311.86:065:56
411.86:065:57
511.86:075:57
611.86:075:58
711.86:075:58
811.86:085:58
911.86:085:59
1011.86:095:59
1111.86:096:00
1211.86:106:00
1311.86:106:00
1411.86:116:01
1511.86:116:01
1611.86:126:02
1711.86:126:02
1811.86:136:03
1911.86:136:03
2011.86:136:04
2111.86:146:04
2211.86:146:05
2311.86:156:05
2411.86:156:06
2511.86:166:06
2611.86:166:06
2711.86:176:07
2811.86:176:07
2911.86:186:08
3011.86:186:08
3111.86:196:09

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.3 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 5.4 kWh/m² in September across the year — December's 4.3 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Tanjung Selor

In seasonPeak

In December, Tanjung Selor sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Tanjung Selor sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Tanjung Selor?

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

2.5
Sightseeing
7th-best month of the year
3.6
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Tanjung Selor.

What to pack for Tanjung Selor in December

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

In December, Tanjung Selor sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

Sea temperature near Tanjung Selor in December

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

The sea at the nearest coast (about 43 km away) is warmest in May at about 30°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Tanjung Selor in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tanjung Selor peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Jul 14UV 12
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr15Extreme
May14Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Tanjung Selor in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tanjung Selor is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1323 µg/m³Jan 17 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr11Good
May9Good
Jun10Good
Jul12Good
Aug19Moderate
Sep24Moderate
Oct14Moderate
Nov8Good
Dec7Good
Location & terrain

Where is Tanjung Selor?

Tanjung Selor sits at 2.8°N, 117.4°E, 9 m above sea level, in Indonesia. The nearest listed city is Tarakan, 59 km away.

Bontang

Topography around Tanjung Selor

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

Within 3 km, the terrain around Tanjung Selor has only modest variations in elevation — a maximum elevation change of 142 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 356 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,364 m.

The land around Tanjung Selor is covered by trees (51%) within 3 km, trees (85%) within 16 km, and trees (66%) and water (26%) within 80 km.

3 km
142 m
16 km
356 m
80 km
1,364 m
treesshrubsgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Tarakan 59 km · Malinau 117 km · Nunukan 148 km · Tawau 167 km · Semporna 229 km · Lahad Datu 265 km · Bandar Nabawan 266 km · Bontang 301 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 Tanjung Selor (2.8375°, 117.3653°, 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).