Muntilan weather in December

In December, Muntilan sees average daytime highs of 28°C and overnight lows near 20°C, with 394 mm of rain across 28.1 wet days and about 12.4 hours of daylight. It is the 6th-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 0% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 24 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is Muntilan's 11th-clearest and 7th-windiest month. For the whole year in context, see Muntilan's year-round climate.

Daytime high
28°
6th warmest
Overnight low
20°
11th coldest
Rainfall
394 mm
28.1 wet days
Daylight
12 h 24 min
5:22 AM – 5:48 PM
Cloud cover
93%
11th clearest
Wind
4 km/h
7th windiest
Solar energy
4.38 kWh/m²
Travel score
3.5
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 Muntilan reaches about 28°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 26°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192820
202820
212820
222820
232820
242820
252720
262720
272720
282720
292720
302720
312720

Muntilan weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°42128.712.43.4
Feb28° / 20°41227.112.23.3
Mar28° / 20°39028.812.13.3
Apr28° / 21°31226.311.83.4
May28° / 20°16520.811.74.4
Jun27° / 20°11816.211.65.3
Jul27° / 19°8513.611.65.9
Aug27° / 18°661211.86.1
Sep27° / 19°10216125.4
Oct28° / 20°22122.912.24.4
Nov28° / 20°37727.812.33.5
Dec28° / 20°39428.112.43.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 3% of December, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5298
6298
7298
8298
9298
10298
11298
12298
13298
14298
15298
16397
17397
18397
19397
20397
21397
22496
23496
24496
25496
26496
27496
28496
29496
30496
31496

Chance of precipitation in December

Any precipitation

Muntilan gets around 394 mm of rain over 28.1 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 91% and peaks near 93% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
192
292
392
493
593
693
793
893
993
1093
1192
1292
1392
1491
1591
1691
1790
1890
1989
2089
2189
2288
2388
2488
2588
2688
2789
2889
2989
3089
3189

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
114356
214356
314356
414356
514356
614257
714257
814257
914356
1014356
1114455
1214554
1314653
1414851
1504951
1605149
1705248
1805446
1905545
2005644
2105743
2205941
2305941
2406040
2506139
2606139
2706139
2806139
2906139
3006139
3106139

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 4 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
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 12 h 24 min at the start of December to 12 h 24 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 5:16 AM to 5:29 AM, and sunset from 5:41 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:165:41
212.45:175:41
312.45:175:42
412.45:175:42
512.45:185:43
612.45:185:43
712.45:185:44
812.45:195:44
912.45:195:45
1012.45:195:45
1112.45:205:46
1212.45:205:46
1312.45:215:47
1412.45:215:47
1512.45:215:48
1612.45:225:48
1712.45:225:49
1812.45:235:49
1912.45:235:50
2012.45:245:50
2112.45:245:51
2212.45:255:51
2312.45:255:52
2412.45:265:52
2512.45:265:52
2612.45:265:53
2712.45:275:53
2812.45:275:54
2912.45:285:54
3012.45:285:55
3112.45:295:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.38 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.38 kWh/m² to a high of 5.74 kWh/m² in September across the year — December's 4.38 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
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.5Bright
Planning a trip in December

Hazard calendar for Muntilan

In seasonPeak

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

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

Muntilan's rainy season runs October–April, when most of the year's rain falls.

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

Is December a good time to visit Muntilan?

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

3.5
Sightseeing
7th-best month of the year
3.7
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Muntilan.

What to pack for Muntilan in December

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

In December, Muntilan sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Muntilan 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 38 km away) is warmest in March at about 29°C and coldest in August near 25°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov28Warm
Dec29Tropical

UV index in Muntilan in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Muntilan peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 14 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeExtremeMar 14UV 15Jun 14UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr12Extreme
May8Very high
Jun6High
Jul10Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov9Very high
Dec11Extreme

Air quality in Muntilan 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 Muntilan is worst in April — around 58 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (September, 34 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorApr 2158 µg/m³Sep 1134 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb46Poor
Mar54Poor
Apr58Unhealthy
May57Unhealthy
Jun51Poor
Jul42Poor
Aug35Moderate
Sep34Moderate
Oct37Poor
Nov42Poor
Dec42Poor
Location & terrain

Where is Muntilan?

Muntilan sits at 7.6°S, 110.3°E, 377 m above sea level, in Indonesia. The nearest listed city is Mertoyudan, 10 km away.

Topography around Muntilan

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

Within 3 km, the terrain around Muntilan has only modest variations in elevation — a maximum elevation change of 183 m around an average of 378 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,897 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,291 m.

The land around Muntilan is covered by trees (40%), cropland (31%) and artificial surfaces (26%) within 3 km, trees (73%) within 16 km, and trees (58%) within 80 km.

3 km
183 m
16 km
1,897 m
80 km
3,291 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Mertoyudan 10 km · Magelang 15 km · Sleman 16 km · Melati 19 km · Godean 21 km · Gamping Lor 24 km · Depok 25 km · Yogyakarta 26 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 Muntilan (-7.5811°, 110.2928°, elevation 377 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).