Barus weather in December

In December, Barus sees average daytime highs of 27°C and overnight lows near 23°C, with 439 mm of rain across 28.4 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°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 11 h 54 min at the start of December to 11 h 54 min by month's end. Set against the rest of the year, December is Barus's 10th-clearest and 9th-windiest month. For the whole year in context, see Barus's year-round climate.

Daytime high
27°
10th warmest
Overnight low
23°
7th coldest
Rainfall
439 mm
28.4 wet days
Daylight
11 h 54 min
6:26 AM – 6:19 PM
Cloud cover
92%
10th clearest
Wind
4 km/h
9th windiest
Solar energy
4.39 kWh/m²
Travel score
3.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Barus reaches about 27°C in the afternoon and slips back to 23°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°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)
12723
22723
32723
42723
52723
62723
72723
82723
92723
102723
112723
122723
132723
142723
152723
162723
172723
182723
192723
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723
312723

Barus weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 23°34227.211.93.7
Feb28° / 23°31424.811.93.7
Mar28° / 23°36128.6123.4
Apr28° / 23°38227.6123.5
May28° / 23°26122.212.14.0
Jun28° / 23°16417.612.14.6
Jul28° / 23°19619.712.14.7
Aug27° / 23°28522.912.14.3
Sep27° / 23°30223.9124.0
Oct27° / 23°41926123.8
Nov27° / 23°52128.311.93.4
Dec27° / 23°43928.411.93.6

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 3% of December, with mostly cloudy or overcast conditions the remaining 96%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1397
2397
3397
4397
5397
6397
7496
8496
9496
10496
11496
12496
13496
14397
15397
16397
17397
18397
19397
20397
21397
22397
23496
24496
25496
26595
27595
28793
29793
30892
31892

Chance of precipitation in December

Any precipitation

Barus gets around 439 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 91% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
194
293
393
493
592
692
791
891
990
1090
1190
1290
1390
1490
1590
1690
1790
1891
1991
2091
2192
2292
2392
2492
2592
2692
2791
2891
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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1694
2694
3694
4694
5793
6793
7793
8793
9892
10892
11892
12892
13892
14991
15991
16991
17991
18991
19991
20991
21991
22892
23892
24892
25892
26892
27892
28991
29991
30991
31991

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 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
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 11 h 54 min at the start of December to 11 h 54 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 6:19 AM to 6:33 AM, and sunset from 6:13 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:196:13
211.96:206:13
311.96:206:14
411.96:216:14
511.96:216:14
611.96:216:15
711.96:226:15
811.96:226:16
911.96:236:16
1011.96:236:16
1111.96:246:17
1211.96:246:17
1311.96:256:18
1411.96:256:18
1511.96:266:19
1611.96:266:19
1711.96:276:20
1811.96:276:20
1911.96:276:20
2011.96:286:21
2111.96:286:21
2211.96:296:22
2311.96:296:22
2411.96:306:23
2511.96:306:23
2611.96:316:24
2711.96:316:24
2811.96:326:25
2911.96:326:25
3011.96:336:26
3111.96:336:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.39 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 5.53 kWh/m² in February across the year — December's 4.39 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
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
264.6Bright
274.6Bright
284.6Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Barus

In seasonPeak

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

Barus 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 Barus?

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

3.6
Sightseeing
9th-best month of the year
3.7
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Barus.

What to pack for Barus in December

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

In December, Barus sees daytime highs around 27°C and nights near 23°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Barus 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 15 km away) is warmest in March at about 30°C and coldest in November 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
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Barus 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 Barus peaks around February 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 20UV 14Jun 20UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep14Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme

Air quality in Barus 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 Barus is worst in February — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodFeb 2017 µg/m³Nov 2312 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May14Moderate
Jun15Moderate
Jul15Moderate
Aug15Moderate
Sep16Moderate
Oct17Moderate
Nov12Good
Dec12Good
Location & terrain

Where is Barus?

Barus sits at 2.0°N, 98.4°E, 5 m above sea level, in Indonesia. The nearest listed city is Sibolga, 52 km away.

Topography around Barus

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

Within 3 km, the terrain around Barus has only modest variations in elevation — a maximum elevation change of 37 m around an average of 5 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,089 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,119 m.

The land around Barus is covered by water (48%), trees (25%) and cropland (20%) within 3 km, trees (48%) and water (48%) within 16 km, and trees (46%) and water (46%) within 80 km.

3 km
37 m
16 km
1,089 m
80 km
2,119 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Sibolga 52 km · Tarutung 63 km · Pangururan 74 km · Singkil 74 km · Sidikalang 83 km · Subulussalam 92 km · Paropo 96 km · Tongging 100 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 Barus (2.0106°, 98.3982°, elevation 5 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).