Kisaran weather in December

In December, Kisaran sees average daytime highs of 31°C and overnight lows near 24°C, with 298 mm of rain across 27.5 wet days and about 11.8 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 1% of the time in December, and the air most often feels miserable.

Daylight stretches from about 11 h 48 min at the start of December to 11 h 48 min by month's end. Set against the rest of the year, December is Kisaran's 11th-clearest and 1st-windiest month. For the whole year in context, see Kisaran's year-round climate.

Daytime high
31°
12th warmest
Overnight low
24°
4th coldest
Rainfall
298 mm
27.5 wet days
Daylight
11 h 48 min
6:23 AM – 6:13 PM
Cloud cover
91%
11th clearest
Wind
5 km/h
1st windiest
Solar energy
4.25 kWh/m²
Travel score
2.6
out of 10

Kisaran is capital of Asahan Regency, North Sumatra, Indonesia.

Density
2,253/km²
people per km²
Founded
1982

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 31°C through the month.

A typical December day in Kisaran reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°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)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313123

How December really feels in Kisaran

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.

Kisaran weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°20825.311.82.8
Feb32° / 24°16121.811.92.7
Mar32° / 24°19425122.4
Apr33° / 24°23327.612.12.1
May33° / 24°23226.612.12.2
Jun33° / 24°16422.212.22.5
Jul32° / 24°16722.412.22.7
Aug32° / 24°20224.912.12.5
Sep32° / 24°27827.7122.3
Oct31° / 24°31629.211.92.3
Nov31° / 24°3282911.92.3
Dec31° / 24°29827.511.82.6

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 5% of December, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2496
3496
4496
5496
6496
7496
8496
9496
10496
11496
12496
13694
14694
15694
16694
17694
18694
19694
20694
21694
22694
23694
24694
25694
26694
27694
28892
29892
30892
31991

Chance of precipitation in December

Any precipitation

Kisaran gets around 298 mm of rain over 27.5 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 89% and peaks near 94% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
194
294
393
493
593
692
792
892
991
1091
1190
1290
1390
1489
1589
1689
1788
1888
1987
2087
2187
2286
2386
2486
2586
2685
2785
2885
2984
3084
3184

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the miserable band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12080
22179
32179
42278
52377
62377
72476
82476
92575
102575
112575
122674
132674
142773
152872
162971
173070
183169
193268
203367
213466
223664
233763
243862
253961
263961
274060
284159
294159
304159
314159

Wind in December

Winds average 5 km/h in December, the windiest month of the year.

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
216calm
226calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 48 min at the start of December to 11 h 48 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 6:16 AM to 6:30 AM, and sunset from 6:06 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:166:06
211.86:176:07
311.86:176:07
411.86:176:08
511.86:186:08
611.86:186:08
711.86:196:09
811.86:196:09
911.86:206:10
1011.86:206:10
1111.86:216:10
1211.86:216:11
1311.86:216:11
1411.86:226:12
1511.86:226:12
1611.86:236:13
1711.86:236:13
1811.86:246:13
1911.86:246:14
2011.86:256:14
2111.86:256:15
2211.86:266:15
2311.86:266:16
2411.86:276:16
2511.86:276:17
2611.86:286:17
2711.86:286:18
2811.86:286:18
2911.86:296:19
3011.86:296:19
3111.86:306:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.25 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.25 kWh/m² to a high of 5.51 kWh/m² in March across the year — December's 4.25 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.2Bright
74.3Bright
84.3Bright
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
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.5Bright
Planning a trip in December

Hazard calendar for Kisaran

In seasonPeak

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

Kisaran sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is December a good time to visit Kisaran?

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

2.6
Sightseeing
4th-best month of the year
3.8
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Kisaran.

What to pack for Kisaran in December

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

In December, Kisaran sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Kisaran 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 33 km away) is warmest in May at about 30°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov29Tropical
Dec29Tropical

UV index in Kisaran 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 Kisaran peaks around February 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 21UV 14Jun 19UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Kisaran 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 Kisaran is worst in September — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1630 µg/m³Dec 1019 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb25Moderate
Mar27Moderate
Apr25Moderate
May25Moderate
Jun23Moderate
Jul27Moderate
Aug28Moderate
Sep30Moderate
Oct28Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Kisaran?

Kisaran sits at 3.0°N, 99.6°E, 20 m above sea level, in Indonesia. The nearest listed city is Tanjungbalai, 21 km away.

Topography around Kisaran

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

Within 3 km, the terrain around Kisaran has only modest variations in elevation — a maximum elevation change of 24 m around an average of 23 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 79 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,188 m.

The land around Kisaran is covered by trees (70%) and artificial surfaces (25%) within 3 km, trees (85%) within 16 km, and trees (61%) and water (30%) within 80 km.

3 km
24 m
16 km
79 m
80 km
2,188 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Tanjungbalai 21 km · Teluk Nibung 22 km · Pekan Bahapal 51 km · Pematangsiantar 61 km · Tebingtinggi 63 km · Perbaungan 98 km · Rantauprapat 101 km · Bandar 105 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 Kisaran (2.9845°, 99.6158°, elevation 20 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).