Medan weather in December

In December, Medan sees average daytime highs of 30°C and overnight lows near 23°C, with 302 mm of rain across 27.9 wet days and about 11.8 hours of daylight. It is the 12th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°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 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 Medan's 10th-clearest and 1st-windiest month. For the whole year in context, see Medan's year-round climate.

Daytime high
30°
12th warmest
Overnight low
23°
9th coldest
Rainfall
302 mm
27.9 wet days
Daylight
11 h 48 min
6:28 AM – 6:15 PM
Cloud cover
91%
10th clearest
Wind
5 km/h
1st windiest
Solar energy
4.1 kWh/m²
Travel score
2.7
out of 10

Medan is city in North Sumatra Province, Indonesia.

Founded
1590

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 30°C through the month.

A typical December day in Medan reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Medan

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.

Medan weather by month

How December compares with the rest of the year at a glance. December is the 12th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°20324.711.83.0
Feb31° / 23°14520.511.93.0
Mar32° / 23°19023.1122.7
Apr32° / 23°24326.112.12.3
May32° / 23°27927.112.22.3
Jun32° / 23°20922.912.22.7
Jul32° / 23°2172412.22.8
Aug31° / 23°24926.112.12.6
Sep31° / 23°35328.2122.4
Oct31° / 23°39329.511.92.4
Nov30° / 23°36628.711.82.5
Dec30° / 23°30227.911.82.7

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 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3595
4595
5496
6496
7496
8496
9496
10496
11595
12595
13595
14595
15595
16595
17595
18694
19595
20595
21595
22595
23595
24694
25694
26793
27793
28793
29892
30991
31991

Chance of precipitation in December

Any precipitation

Medan gets around 302 mm of rain over 27.9 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 90% 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
394
493
593
693
793
892
992
1092
1191
1291
1391
1491
1590
1690
1790
1890
1990
2089
2189
2289
2388
2488
2588
2687
2787
2887
2986
3086
3185

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 77% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
16832
26832
36931
46931
56931
67030
77030
87129
97129
107228
117327
127426
137525
147624
157723
167822
177921
188020
198020
208119
218218
228218
238317
248416
258416
268515
278515
288515
298515
308515
318515

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
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
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 6:21 AM to 6:35 AM, and sunset from 6:09 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:216:09
211.86:216:10
311.86:226:10
411.86:226:10
511.86:236:11
611.86:236:11
711.86:236:11
811.86:246:12
911.86:246:12
1011.86:256:13
1111.86:256:13
1211.86:266:14
1311.86:266:14
1411.86:276:14
1511.86:276:15
1611.86:286:15
1711.86:286:16
1811.86:296:16
1911.86:296:17
2011.86:306:17
2111.86:306:18
2211.86:316:18
2311.86:316:19
2411.86:316:19
2511.86:326:20
2611.86:326:20
2711.86:336:20
2811.86:336:21
2911.86:346:21
3011.86:346:22
3111.86:356:22

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.1 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.1 kWh/m² to a high of 5.51 kWh/m² in March across the year — December's 4.1 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Medan

In seasonPeak

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

Medan 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 Medan?

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

2.7
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 Medan.

What to pack for Medan in December

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

In December, Medan sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Medan 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 40 km away) is warmest in June 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
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Medan in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Medan peaks around February 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 14Jun 23UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar13Extreme
Apr12Extreme
May11Extreme
Jun10Extreme
Jul10Extreme
Aug11Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Medan 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 Medan is worst in September — around 33 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1632 µg/m³Dec 1123 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb28Moderate
Mar32Moderate
Apr31Moderate
May30Moderate
Jun29Moderate
Jul30Moderate
Aug30Moderate
Sep33Moderate
Oct30Moderate
Nov23Moderate
Dec23Moderate
Location & terrain

Where is Medan?

Medan sits at 3.6°N, 98.7°E, 26 m above sea level, in Indonesia. The nearest listed city is Sunggal, 6.0 km away.

Topography around Medan

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

Within 3 km, the terrain around Medan has only modest variations in elevation — a maximum elevation change of 25 m around an average of 27 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 127 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,429 m.

The land around Medan is covered by artificial surfaces (85%) within 3 km, trees (42%) and artificial surfaces (37%) within 16 km, and trees (61%) and water (26%) within 80 km.

3 km
25 m
16 km
127 m
80 km
2,429 m
treesgrasslandcroplandartificial surfaceswatermangroves
December weather nearby: Sunggal 6.0 km · Deli Tua 9.0 km · Binjai 20 km · Belawan 21 km · Percut 22 km · Stabat 29 km · Perbaungan 32 km · Labuhan Deli 33 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 Medan (3.5833°, 98.6667°, elevation 26 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).