Sidareja weather in December

In December, Sidareja sees average daytime highs of 29°C and overnight lows near 24°C, with 319 mm of rain across 28.3 wet days and about 12.4 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 1% of the time in December, and the air most often feels oppressive.

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 Sidareja's 12th-clearest and 8th-windiest month. For the whole year in context, see Sidareja's year-round climate.

Daytime high
29°
6th warmest
Overnight low
24°
11th coldest
Rainfall
319 mm
28.3 wet days
Daylight
12 h 24 min
5:28 AM – 5:54 PM
Cloud cover
91%
12th clearest
Wind
5 km/h
8th windiest
Solar energy
4.41 kWh/m²
Travel score
2.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical December day in Sidareja reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°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 on par with November and on par with 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
152924
162924
172924
182924
192924
202924
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924
312924

How December really feels in Sidareja

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.

Sidareja weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°33228.412.42.8
Feb30° / 24°3032712.22.7
Mar30° / 24°29428.412.12.8
Apr30° / 24°23026.111.83.0
May30° / 24°14820.611.73.9
Jun29° / 23°10316.211.64.8
Jul28° / 22°7112.711.65.9
Aug27° / 22°529.211.86.5
Sep28° / 23°8112.2125.7
Oct29° / 23°17419.212.24.3
Nov29° / 24°28925.912.33.2
Dec29° / 24°31928.312.42.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of December, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2397
3397
4397
5397
6397
7496
8397
9397
10397
11397
12397
13496
14496
15496
16694
17694
18694
19694
20793
21793
22793
23793
24793
25793
26793
27793
28793
29793
30793
31892

Chance of precipitation in December

Any precipitation

Sidareja gets around 319 mm of rain over 28.3 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 (%)
191
292
392
492
593
693
793
893
993
1093
1193
1292
1392
1491
1591
1690
1790
1890
1990
2089
2189
2289
2389
2489
2589
2689
2790
2890
2990
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 80% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118316
218217
318217
418118
518118
618019
718019
818019
917920
1017920
1117920
1217920
1317920
1417920
1517920
1617920
1717920
1808119
1908119
2008119
2108119
2208119
2308119
2408119
2508119
2608119
2708119
2808119
2908119
3008119
3108119

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
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 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 5:22 AM to 5:35 AM, and sunset from 5:47 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:225:47
212.45:235:47
312.45:235:48
412.45:235:48
512.45:245:49
612.45:245:49
712.45:245:50
812.45:255:50
912.45:255:51
1012.45:265:51
1112.45:265:52
1212.45:265:52
1312.45:275:53
1412.45:275:53
1512.45:285:53
1612.45:285:54
1712.45:285:54
1812.45:295:55
1912.45:295:55
2012.45:305:56
2112.45:305:56
2212.45:315:57
2312.45:315:57
2412.45:325:58
2512.45:325:58
2612.45:335:59
2712.45:335:59
2812.45:346:00
2912.45:346:00
3012.45:356:00
3112.45:356:01

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.41 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 5.16 kWh/m² in September across the year — December's 4.41 kWh/m² sits near the bottom.

024151015202531
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
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in December

Hazard calendar for Sidareja

In seasonPeak

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

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

Sidareja'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 Sidareja?

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

2.9
Sightseeing
9th-best month of the year
3.9
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Sidareja.

What to pack for Sidareja in December

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

In December, Sidareja sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Sidareja 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 44 km away) is warmest in April 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
May29Tropical
Jun28Warm
Jul27Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec29Tropical

UV index in Sidareja 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 Sidareja peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeExtremeMar 12UV 15Jun 15UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7High
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov9Very high
Dec12Extreme

Air quality in Sidareja 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 Sidareja is worst in May — around 46 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMay 1545 µg/m³Sep 1630 µg/m³
PM2.5 (µg/m³)Level
Jan39Poor
Feb39Poor
Mar41Poor
Apr44Poor
May46Poor
Jun43Poor
Jul37Poor
Aug31Moderate
Sep30Moderate
Oct31Moderate
Nov32Moderate
Dec33Moderate
Location & terrain

Where is Sidareja?

Sidareja sits at 7.5°S, 108.8°E, 8 m above sea level, in Indonesia. The nearest listed city is Majenang, 21 km away.

Topography around Sidareja

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

Within 3 km, the terrain around Sidareja has only modest variations in elevation — a maximum elevation change of 77 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 437 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Sidareja is covered by cropland (46%) and trees (37%) within 3 km, trees (51%) and cropland (42%) within 16 km, and trees (53%) and water (26%) within 80 km.

3 km
77 m
16 km
437 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Majenang 21 km · Wangon 29 km · Cilacap 36 km · Purwokerto 49 km · Margasari 50 km · Baturaden 51 km · Ciamis 52 km · Kroya 53 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 Sidareja (-7.4846°, 108.7923°, elevation 8 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).