Sumbawa Besar weather in December

In December, Sumbawa Besar sees average daytime highs of 30°C and overnight lows near 24°C, with 264 mm of rain across 26.6 wet days and about 12.5 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 6% 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 Sumbawa Besar's 10th-clearest and 12th-windiest month. For the whole year in context, see Sumbawa Besar's year-round climate.

Daytime high
30°
7th warmest
Overnight low
24°
11th coldest
Rainfall
264 mm
26.6 wet days
Daylight
12 h 30 min
5:52 AM – 6:21 PM
Cloud cover
84%
10th clearest
Wind
5 km/h
12th windiest
Solar energy
5.22 kWh/m²
Travel score
3.1
out of 10

Sumbawa Besar is place in Lesser Sunda Islands, Indonesia.

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 30°C through the month.

A typical December day in Sumbawa Besar reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924
312924

How December really feels in Sumbawa Besar

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.

Sumbawa Besar weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°33829.112.43.0
Feb29° / 24°31726.412.33.1
Mar29° / 24°23525.312.13.4
Apr30° / 24°1061711.84.2
May30° / 23°31711.65.4
Jun30° / 23°143.311.56.1
Jul29° / 22°61.611.66.5
Aug30° / 22°10.411.76.3
Sep31° / 23°51.2125.5
Oct32° / 24°224.812.24.7
Nov31° / 24°9414.712.43.7
Dec30° / 24°26426.612.53.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 8% of December, with mostly cloudy or overcast conditions the remaining 85%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22476
32377
42179
52080
61981
71981
81783
91684
101684
111585
121486
131486
141486
151486
161387
171387
181288
191189
201189
211189
221189
231189
241090
251090
261189
271189
281189
291189
301189
311189

Chance of precipitation in December

Any precipitation

Sumbawa Besar gets around 264 mm of rain over 26.6 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 85% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
175
277
378
479
580
682
783
883
984
1085
1185
1286
1386
1487
1587
1687
1787
1887
1988
2088
2188
2288
2388
2488
2588
2688
2789
2889
2989
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 78% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118811
208713
308614
408515
508416
608317
708218
808119
908020
1007921
1107921
1207822
1307822
1407822
1507723
1607723
1707723
1807723
1907624
2007624
2107525
2207525
2307426
2407426
2507327
2607327
2707327
2807327
2907327
3007327
3107327

Wind in December

Winds average 5 km/h in December, the calmest month.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 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
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 5:46 AM to 5:59 AM, and sunset from 6:14 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:466:14
212.55:476:14
312.55:476:15
412.55:476:15
512.55:476:16
612.55:486:16
712.55:486:17
812.55:496:17
912.55:496:18
1012.55:496:18
1112.55:506:19
1212.55:506:19
1312.55:506:20
1412.55:516:20
1512.55:516:21
1612.55:526:21
1712.55:526:22
1812.55:536:22
1912.55:536:23
2012.55:546:23
2112.55:546:24
2212.55:546:24
2312.55:556:25
2412.55:556:25
2512.55:566:26
2612.55:566:26
2712.55:576:26
2812.55:576:27
2912.55:586:27
3012.55:586:28
3112.55:596:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.22 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 6.73 kWh/m² in October across the year — December's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in December

Hazard calendar for Sumbawa Besar

In seasonPeak

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

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

Sumbawa Besar'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 Sumbawa Besar?

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

3.1
Sightseeing
10th-best month of the year
4.2
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Sumbawa Besar.

What to pack for Sumbawa Besar in December

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

In December, Sumbawa Besar sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Sumbawa Besar 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 14 km away) is warmest in November at about 30°C and coldest in August near 28°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
Apr30Tropical
May29Tropical
Jun29Tropical
Jul28Warm
Aug28Warm
Sep28Warm
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Sumbawa Besar 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 Sumbawa Besar peaks around March 12 at about 15 (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 highExtremeMar 12UV 15Jul 10UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec13Extreme

Air quality in Sumbawa Besar 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 Sumbawa Besar is worst in October — around 30 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (March, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 1529 µg/m³Mar 1610 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb10Good
Mar10Good
Apr10Good
May12Good
Jun12Good
Jul12Moderate
Aug15Moderate
Sep23Moderate
Oct30Moderate
Nov21Moderate
Dec13Moderate
Location & terrain

Where is Sumbawa Besar?

Sumbawa Besar sits at 8.5°S, 117.4°E, 14 m above sea level, in Indonesia. The nearest listed city is Taliwang, 68 km away.

Topography around Sumbawa Besar

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

Within 3 km, the terrain around Sumbawa Besar has only modest variations in elevation — a maximum elevation change of 115 m around an average of 32 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,795 m.

The land around Sumbawa Besar is covered by grassland (33%), trees (24%) and artificial surfaces (23%) within 3 km, trees (31%), water (25%) and grassland (22%) within 16 km, and water (54%) and trees (32%) within 80 km.

3 km
115 m
16 km
948 m
80 km
2,795 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Taliwang 68 km · Selong 99 km · Dompu 115 km · Praya 129 km · Lombok 144 km · Bima 144 km · Gili Trawangan 153 km · Amlapura 198 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 Sumbawa Besar (-8.4932°, 117.4202°, elevation 14 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).