Sungai Raya weather in December

In December, Sungai Raya sees average daytime highs of 28°C and overnight lows near 24°C, with 395 mm of rain across 28.4 wet days and about 12 hours of daylight. It is the 11th-warmest and 2nd-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 1% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of December to 12 hours by month's end. Set against the rest of the year, December is Sungai Raya's 11th-clearest and 5th-windiest month. For the whole year in context, see Sungai Raya's year-round climate.

Daytime high
28°
11th warmest
Overnight low
24°
4th coldest
Rainfall
395 mm
28.4 wet days
Daylight
12 hours
5:42 AM – 5:39 PM
Cloud cover
92%
11th clearest
Wind
9 km/h
5th windiest
Solar energy
4.26 kWh/m²
Travel score
3.1
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 Sungai Raya reaches about 28°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, December runs on par with November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12824
22824
32824
42824
52824
62824
72824
82824
92824
102924
112924
122924
132824
142824
152824
162824
172824
182824
192824
202824
212824
222824
232824
242824
252824
262824
272824
282824
292824
302824
312824

How December really feels in Sungai Raya

Once humidity and wind are folded in, December averages 29 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
29
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.

Sungai Raya weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°28725.5123.5
Feb29° / 24°18419.9123.8
Mar29° / 24°19822.1123.7
Apr30° / 25°22425.1123.2
May30° / 25°23024.7123.3
Jun30° / 25°19219.9123.7
Jul30° / 25°17318124.1
Aug30° / 25°16418.4123.9
Sep29° / 25°21021.4123.6
Oct29° / 24°32027.1123.2
Nov29° / 24°40529122.9
Dec28° / 24°39528.4123.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 2% of December, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2496
3496
4496
5496
6496
7496
8496
9496
10496
11496
12496
13496
14397
15397
16397
17397
18298
19298
20298
21298
22397
23397
24397
25397
26397
27397
28397
29397
30496
31496

Chance of precipitation in December

Any precipitation

Sungai Raya gets around 395 mm of rain over 28.4 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 92% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
195
295
394
494
594
693
793
892
992
1092
1192
1292
1392
1492
1592
1692
1792
1892
1992
2092
2192
2292
2392
2492
2591
2691
2791
2890
2990
3089
3189

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 71% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
16337
26436
36535
46634
56733
66832
76931
87030
97030
107129
117129
127228
137228
147228
157228
167228
177327
187327
197327
207327
217327
227327
237327
247327
257426
267426
277426
287426
297426
307525
317525

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 hours at the start of December to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:35 AM to 5:49 AM, and sunset from 5:33 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:355:33
212.05:365:33
312.05:365:34
412.05:365:34
512.05:375:35
612.05:375:35
712.05:385:35
812.05:385:36
912.05:395:36
1012.05:395:37
1112.05:395:37
1212.05:405:38
1312.05:405:38
1412.05:415:38
1512.05:415:39
1612.05:425:39
1712.05:425:40
1812.05:435:40
1912.05:435:41
2012.05:445:41
2112.05:445:42
2212.05:455:42
2312.05:455:43
2412.05:465:43
2512.05:465:44
2612.05:465:44
2712.05:475:45
2812.05:475:45
2912.05:485:45
3012.05:485:46
3112.05:495:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.26 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.26 kWh/m² to a high of 5.39 kWh/m² in March across the year — December's 4.26 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.4Bright
Planning a trip in December

Is December a good time to visit Sungai Raya?

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

3.1
Sightseeing
11th-best month of the year
3.8
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Sungai Raya.

What to pack for Sungai Raya in December

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

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

light clothesrain gear

Sea temperature near Sungai Raya 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 offshore is warmest in May at about 30°C and coldest in February 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
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Sungai Raya 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 Sungai Raya peaks around February 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 18UV 16Jul 12UV 11
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Sungai Raya 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 Sungai Raya is worst in September — around 42 µg/m³ PM2.5 (poor), about 4.2× the cleanest month (January, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1440 µg/m³Jan 1110 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar13Moderate
Apr14Moderate
May13Moderate
Jun13Moderate
Jul15Moderate
Aug31Moderate
Sep42Poor
Oct23Moderate
Nov12Moderate
Dec10Good
Location & terrain

Where is Sungai Raya?

Sungai Raya sits at 0.7°N, 108.9°E, 9 m above sea level, in Indonesia. The nearest listed city is Singkawang, 25 km away.

Topography around Sungai Raya

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

Within 3 km, the terrain around Sungai Raya has only modest variations in elevation — a maximum elevation change of 186 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 323 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,381 m.

The land around Sungai Raya is covered by trees (47%) and water (33%) within 3 km, water (48%) and trees (43%) within 16 km, and trees (49%) and water (46%) within 80 km.

3 km
186 m
16 km
323 m
80 km
1,381 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Singkawang 25 km · Pemangkat 52 km · Bengkayang 61 km · Kota Sambas 86 km · Pontianak 94 km · Lundu 151 km · Bau 160 km · Tebedu 167 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 Sungai Raya (0.7°, 108.9°, elevation 9 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. 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).