Ruteng weather in December

In December, Ruteng sees average daytime highs of 28°C and overnight lows near 21°C, with 425 mm of rain across 29 wet days and about 12.5 hours of daylight. It is the 8th-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 3% 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 Ruteng's 10th-clearest and 3rd-windiest month. For the whole year in context, see Ruteng's year-round climate.

Daytime high
28°
8th warmest
Overnight low
21°
12th coldest
Rainfall
425 mm
29 wet days
Daylight
12 h 30 min
5:39 AM – 6:09 PM
Cloud cover
89%
10th clearest
Wind
4 km/h
3rd windiest
Solar energy
5.29 kWh/m²
Travel score
3.4
out of 10

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 Ruteng reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C warmer than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92821
102821
112821
122821
132821
142821
152821
162821
172821
182821
192821
202821
212821
222821
232821
242821
252721
262721
272721
282721
292721
302721
312721

Ruteng weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°4333012.43.3
Feb27° / 21°43327.312.33.3
Mar27° / 20°39828.212.13.6
Apr28° / 20°27723.611.84.1
May28° / 19°12016.311.65.2
Jun28° / 19°619.811.56.2
Jul28° / 18°407.211.56.5
Aug29° / 18°234.511.76.2
Sep30° / 19°446.111.95.5
Oct30° / 20°12913.912.24.6
Nov29° / 20°30623.812.43.6
Dec28° / 21°4252912.53.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 5% of December, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11189
21189
31090
41090
5991
6991
7991
8991
9892
10892
11892
12892
13892
14892
15892
16793
17793
18793
19892
20793
21793
22793
23793
24793
25793
26793
27793
28793
29694
30694
31694

Chance of precipitation in December

Any precipitation

Ruteng gets around 425 mm of rain over 29 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.

0%20%40%60%80%100%151015202531
Rain chance (%)
193
294
394
495
595
695
795
895
995
1095
1194
1294
1394
1493
1593
1693
1792
1892
1992
2092
2192
2292
2392
2492
2592
2692
2793
2893
2994
3094
3194

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
12575
22476
32377
42278
52278
62179
72179
82080
92080
102080
112080
122080
132080
142080
152080
162080
172080
182179
192179
202179
212179
222179
232179
242179
252179
262179
272179
282080
292080
302080
312080

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 5 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
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 5:34 AM to 5:46 AM, and sunset from 6:02 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:346:02
212.55:346:02
312.55:346:03
412.55:356:03
512.55:356:04
612.55:356:04
712.55:366:05
812.55:366:05
912.55:376:06
1012.55:376:06
1112.55:376:07
1212.55:386:07
1312.55:386:08
1412.55:386:08
1512.55:396:09
1612.55:396:09
1712.55:406:10
1812.55:406:10
1912.55:416:11
2012.55:416:11
2112.55:426:12
2212.55:426:12
2312.55:436:13
2412.55:436:13
2512.55:436:14
2612.55:446:14
2712.55:446:14
2812.55:456:15
2912.55:456:15
3012.55:466:16
3112.55:466:16

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.29 kWh/m².

For context, solar energy here swings from a low near 5 kWh/m² to a high of 6.78 kWh/m² in October across the year — December's 5.29 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
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 Ruteng

In seasonPeak

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

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

Ruteng'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 Ruteng?

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

3.4
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 Ruteng.

What to pack for Ruteng in December

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

In December, Ruteng sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Ruteng 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 31 km away) is warmest in March at about 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug26Warm
Sep27Warm
Oct28Warm
Nov29Tropical
Dec29Tropical

UV index in Ruteng 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 Ruteng peaks around March 10 at about 15 (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 15Jul 10UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug13Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec13Extreme

Air quality in Ruteng 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 Ruteng is worst in October — around 15 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (February, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1715 µg/m³Feb 199 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb9Good
Mar10Good
Apr10Good
May10Good
Jun12Good
Jul11Good
Aug10Good
Sep13Moderate
Oct15Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Ruteng?

Ruteng sits at 8.6°S, 120.5°E, 1,173 m above sea level, in Indonesia. The nearest listed city is Labuan Bajo, 65 km away.

Lewoleba

Topography around Ruteng

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

Within 3 km, the terrain around Ruteng has large variations in elevation — a maximum elevation change of 1,068 m around an average of 1,217 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,215 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,328 m.

The land around Ruteng is covered by trees (63%) within 3 km, trees (89%) within 16 km, and water (56%) and trees (39%) within 80 km.

3 km
1,068 m
16 km
2,215 m
80 km
2,328 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Labuan Bajo 65 km · Waingapu 118 km · Ende 134 km · Tambolaka 162 km · Bima 192 km · Maumere 192 km · Dompu 220 km · Lewoleba 326 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 Ruteng (-8.6114°, 120.4644°, elevation 1,173 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).