Atambua weather in December

In December, Atambua sees average daytime highs of 28°C and overnight lows near 24°C, with 226 mm of rain across 24.6 wet days and about 12.5 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 8% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of December to 12 h 30 min by month's end. Set against the rest of the year, December is Atambua's 10th-clearest and 8th-windiest month. For the whole year in context, see Atambua's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
226 mm
24.6 wet days
Daylight
12 h 30 min
5:21 AM – 5:52 PM
Cloud cover
83%
10th clearest
Wind
4 km/h
8th windiest
Solar energy
5.39 kWh/m²
Travel score
3.7
out of 10

Atambua is town in East Nusa Tenggara, Indonesia.

Density
1,465/km²
people per km²

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 28°C through the month.

A typical December day in Atambua reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C warmer than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
22924
32924
42924
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in Atambua

Once humidity and wind are folded in, December averages 5 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
5
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.

Atambua weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°29528.112.53.6
Feb27° / 24°26025.512.33.6
Mar28° / 24°2082312.14.3
Apr28° / 23°10214.311.85.2
May28° / 23°487.211.66.5
Jun28° / 22°273.911.57.4
Jul27° / 21°132.711.57.7
Aug27° / 21°71.211.78.0
Sep28° / 22°91.711.97.4
Oct29° / 23°183.912.26.4
Nov29° / 24°7010.512.45.2
Dec28° / 24°22624.612.53.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 83%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22674
32575
42377
52377
62377
72179
82179
92179
102080
111981
121981
131882
141783
151783
161783
171585
181585
191585
201585
211387
221387
231288
241189
251189
261189
271189
281189
291090
301090
311090

Chance of precipitation in December

Any precipitation

Atambua gets around 226 mm of rain over 24.6 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 78% and peaks near 88% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
164
265
367
468
569
671
772
873
974
1075
1176
1277
1378
1478
1579
1679
1780
1881
1981
2082
2182
2283
2383
2484
2584
2685
2785
2886
2986
3087
3188

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 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
16931
26931
36922
45932
55932
65932
75923
84933
94933
104933
113943
123943
133943
142953
152953
162953
171963
181963
191963
201963
210973
220973
230973
240973
250973
260973
270973
280973
290973
300973
310973

Wind in December

Winds average 4 km/h in December.

Across December, daily wind ranges from about 4 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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 30 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 5:15 AM to 5:28 AM, and sunset from 5:45 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:155:45
212.55:165:45
312.55:165:46
412.55:165:46
512.55:175:47
612.55:175:47
712.55:175:48
812.55:185:48
912.55:185:49
1012.55:185:49
1112.55:195:50
1212.55:195:50
1312.55:195:51
1412.55:205:51
1512.55:205:52
1612.55:215:52
1712.55:215:53
1812.55:225:53
1912.55:225:54
2012.55:235:54
2112.55:235:55
2212.55:235:55
2312.55:245:56
2412.55:245:56
2512.55:255:57
2612.55:255:57
2712.55:265:58
2812.55:265:58
2912.55:275:58
3012.55:275:59
3112.55:285:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.39 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 6.6 kWh/m² in October across the year — December's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.6Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in December

Hazard calendar for Atambua

In seasonPeak

In December, Atambua sits inside its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.

Atambua sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Atambua's monsoon runs December–March, when most of the year's rain falls.

Cyclone
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Atambua?

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

3.7
Sightseeing
10th-best month of the year
4.5
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Atambua.

What to pack for Atambua in December

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

In December, Atambua sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Atambua in December

The nearest coast averages about 30°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 26 km away) is warmest in December at about 30°C and coldest in August near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul27Warm
Aug27Warm
Sep27Warm
Oct29Tropical
Nov29Tropical
Dec30Tropical

UV index in Atambua 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 Atambua peaks around February 22 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 22UV 16Jul 10UV 9
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug12Extreme
Sep14Extreme
Oct14Extreme
Nov14Extreme
Dec12Extreme
Location & terrain

Where is Atambua?

Atambua sits at 9.1°S, 124.9°E, 336 m above sea level, in Indonesia. The nearest listed city is Maliana, 38 km away.

Topography around Atambua

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

Within 3 km, the terrain around Atambua has significant variations in elevation — a maximum elevation change of 300 m around an average of 351 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 944 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,916 m.

The land around Atambua is covered by grassland (45%), trees (30%) and artificial surfaces (22%) within 3 km, trees (46%) and grassland (44%) within 16 km, and water (47%) and trees (34%) within 80 km.

3 km
300 m
16 km
944 m
80 km
2,916 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Maliana 38 km · Suai 46 km · Atsabe 59 km · Kefamenanu 59 km · Maubara 65 km · Gleno 73 km · Liquiçá 76 km · Aileu 85 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 Atambua (-9.1061°, 124.8925°, elevation 336 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).