Aileu weather in December

In December, Aileu sees average daytime highs of 27°C and overnight lows near 20°C, with 334 mm of rain across 28.8 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 5% of the time in December, and the air most often feels muggy.

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 Aileu's 10th-clearest and 11th-windiest month. For the whole year in context, see Aileu's year-round climate.

Daytime high
27°
5th warmest
Overnight low
20°
12th coldest
Rainfall
334 mm
28.8 wet days
Daylight
12 h 30 min
6:19 AM – 6:49 PM
Cloud cover
85%
10th clearest
Wind
3 km/h
11th windiest
Solar energy
5.15 kWh/m²
Travel score
3.6
out of 10

Aileu is A town in Timor-Leste.

Density
69/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 27°C through the month.

A typical December day in Aileu reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32720
42720
52720
62720
72720
82720
92720
102720
112720
122720
132720
142720
152720
162720
172720
182720
192720
202720
212720
222620
232620
242620
252620
262620
272620
282620
292620
302620
312620

Aileu weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 20°34529.512.53.5
Feb26° / 20°3262712.33.5
Mar26° / 20°30727.412.13.9
Apr27° / 19°18719.311.84.9
May27° / 19°811211.66.2
Jun26° / 18°416.711.57.1
Jul26° / 17°194.411.57.5
Aug27° / 16°81.511.77.9
Sep28° / 17°152.211.97.2
Oct29° / 19°416.612.26.0
Nov28° / 20°15717.812.44.7
Dec27° / 20°33428.812.53.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% 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 87%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32179
42080
52080
61981
71981
81882
91783
101783
111783
121585
131486
141486
151387
161387
171387
181189
191189
201090
211090
22991
23991
24991
25892
26892
27892
28793
29793
30793
31793

Chance of precipitation in December

Any precipitation

Aileu gets around 334 mm of rain over 28.8 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 93% and peaks near 95% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
185
286
387
488
589
690
791
891
992
1093
1193
1294
1394
1494
1594
1695
1795
1895
1995
2095
2195
2295
2394
2494
2594
2694
2794
2894
2994
3094
3194

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12147410
21137610
31127611
41117612
51107712
6197713
7087913
8078013
9068113
10068113
11058213
12058213
13048313
14048313
15038413
16038413
17028513
18028513
19028513
20028513
21018613
22018613
23018613
24018613
25018613
26018613
27018613
28018613
29018613
30018712
31018712

Wind in December

Winds average 3 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
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

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 6:13 AM to 6:26 AM, and sunset from 6:42 PM to 6:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:136:42
212.56:146:42
312.56:146:43
412.56:146:43
512.56:156:44
612.56:156:44
712.56:156:45
812.56:166:45
912.56:166:46
1012.56:166:46
1112.56:176:47
1212.56:176:47
1312.56:176:48
1412.56:186:48
1512.56:186:49
1612.56:196:49
1712.56:196:50
1812.56:206:50
1912.56:206:51
2012.56:216:51
2112.56:216:51
2212.56:216:52
2312.56:226:52
2412.56:226:53
2512.56:236:53
2612.56:236:54
2712.56:246:54
2812.56:246:55
2912.56:256:55
3012.56:256:56
3112.56:266:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.15 kWh/m².

For context, solar energy here swings from a low near 4.64 kWh/m² to a high of 6.62 kWh/m² in October across the year — December's 5.15 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in December

Hazard calendar for Aileu

In seasonPeak

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

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

Aileu's monsoon runs November–April, 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 Aileu?

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

3.6
Sightseeing
10th-best month of the year
3.7
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Aileu.

What to pack for Aileu in December

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

In December, Aileu sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 29 days see rain.

rain gearlight clothessun protection

Sea temperature near Aileu 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 40 km away) is warmest in November 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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug27Warm
Sep28Warm
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Aileu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aileu peaks around March 10 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 16Jul 10UV 10
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug12Extreme
Sep15Extreme
Oct14Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Aileu?

Aileu sits at 8.7°S, 125.6°E, 913 m above sea level, in Timor Leste. The nearest listed city is Gleno, 14 km away.

AtsabeLiquiçáMaubaraMalianaSuaiAtambua

Topography around Aileu

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

Within 3 km, the terrain around Aileu has significant variations in elevation — a maximum elevation change of 339 m around an average of 994 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,315 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,916 m.

The land around Aileu is covered by grassland (66%) and trees (26%) within 3 km, grassland (51%) and trees (48%) within 16 km, and water (50%) and trees (36%) within 80 km.

3 km
339 m
16 km
2,315 m
80 km
2,916 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Gleno 14 km · Dili 19 km · Atsabe 29 km · Liquiçá 29 km · Maubara 42 km · Maliana 48 km · Suai 73 km · Atambua 85 km

Timor Leste travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / F / I
220 V · 50 Hz
Prices
≈ 28% of US
price level, 2025
GDP per capita
$1,341
2025
Homicide rate
4.1
per 100k, 2015
Road deaths
11.9
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Catholic 91%other 7%Protestant Evangelical 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 Aileu (-8.7281°, 125.5664°, elevation 913 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).