Binjai weather in January

In January, Binjai sees average daytime highs of 30°C and overnight lows near 22°C, with 237 mm of rain across 26.3 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 7th-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 3% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of January to 11 h 48 min by month's end. Set against the rest of the year, January is Binjai's 5th-clearest and 4th-windiest month. For the whole year in context, see Binjai's year-round climate.

Daytime high
30°
10th warmest
Overnight low
22°
2nd coldest
Rainfall
237 mm
26.3 wet days
Daylight
11 h 48 min
6:41 AM – 6:30 PM
Cloud cover
84%
5th clearest
Wind
5 km/h
4th windiest
Solar energy
4.61 kWh/m²
Travel score
3.1
out of 10

Binjai is city in North Sumatra Province, Indonesia.

Density
3,095/km²
people per km²
Founded
1872

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical January day in Binjai reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°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, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12922
22922
32922
42922
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How January really feels in Binjai

Once humidity and wind are folded in, January 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 January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Binjai weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°23726.311.83.1
Feb30° / 22°1782211.93.1
Mar31° / 22°21125.4122.8
Apr31° / 22°25328.112.12.4
May32° / 22°2662812.22.3
Jun32° / 22°18924.412.22.5
Jul32° / 22°18624.912.22.6
Aug32° / 22°21326.812.12.4
Sep31° / 22°30628.6122.4
Oct30° / 22°33829.611.92.5
Nov30° / 22°35828.811.82.7
Dec29° / 22°34528.711.82.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 87%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
31189
41189
51189
61288
71288
81288
91288
101288
111288
121288
131288
141288
151288
161288
171288
181387
191387
201387
211387
221387
231387
241387
251387
261486
271486
281486
291585
301585
311684

Chance of precipitation in January

Any precipitation

Binjai gets around 237 mm of rain over 26.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 90% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
190
289
389
489
588
688
788
888
987
1087
1187
1286
1386
1486
1585
1685
1785
1884
1984
2084
2183
2283
2382
2482
2582
2682
2781
2881
2981
3080
3180

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
12971
22971
32971
42971
52971
63961
73952
83952
93952
103952
113952
123952
133952
143952
154942
164942
174942
184942
194942
204942
214942
224942
234942
244942
254951
264951
274951
284951
294951
304951
314951

Wind in January

Winds average 5 km/h in January.

Across January, 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 January

DaylightNight

Daylight runs from about 11 h 48 min at the start of January 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 January. Sunrise moves from 6:35 AM to 6:44 AM, and sunset from 6:23 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:356:23
211.86:366:24
311.86:366:24
411.86:376:24
511.86:376:25
611.86:376:25
711.86:386:26
811.86:386:26
911.86:396:27
1011.86:396:27
1111.86:396:28
1211.86:406:28
1311.86:406:28
1411.86:406:29
1511.86:416:29
1611.86:416:30
1711.86:416:30
1811.86:426:31
1911.86:426:31
2011.86:426:31
2111.86:426:32
2211.86:436:32
2311.86:436:32
2411.86:436:33
2511.86:436:33
2611.86:436:33
2711.86:446:34
2811.86:446:34
2911.86:446:34
3011.86:446:34
3111.86:446:35

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.61 kWh/m².

For context, solar energy here swings from a low near 3.95 kWh/m² to a high of 5.37 kWh/m² in March across the year — January's 4.61 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.3Bright
34.3Bright
44.3Bright
54.4Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
314.9Bright
Planning a trip in January

Hazard calendar for Binjai

In seasonPeak

None of Binjai's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Binjai 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 January a good time to visit Binjai?

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

3.1
Sightseeing
1st-best month of the year
4.2
Beach & pool
2nd-best month of the year

January is a weaker month for outdoor sightseeing in Binjai.

What to pack for Binjai in January

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

In January, Binjai sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Binjai in January

The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 53 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 Binjai in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Binjai peaks around February 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 14Jul 10UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar14Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep14Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Binjai in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Binjai is worst in March — around 34 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2434 µg/m³Dec 1626 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb30Moderate
Mar34Moderate
Apr34Moderate
May32Moderate
Jun31Moderate
Jul31Moderate
Aug31Moderate
Sep34Moderate
Oct34Moderate
Nov28Moderate
Dec26Moderate
Location & terrain

Where is Binjai?

Binjai sits at 3.6°N, 98.5°E, 34 m above sea level, in Indonesia. The nearest listed city is Sunggal, 15 km away.

Topography around Binjai

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

Within 3 km, the terrain around Binjai has only modest variations in elevation — a maximum elevation change of 35 m around an average of 36 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,973 m.

The land around Binjai is covered by trees (57%) and artificial surfaces (38%) within 3 km, trees (70%) within 16 km, and trees (66%) and water (21%) within 80 km.

3 km
35 m
16 km
153 m
80 km
2,973 m
treesgrasslandcroplandartificial surfaceswatermangroves
January weather nearby: Sunggal 15 km · Stabat 15 km · Medan 20 km · Deli Tua 24 km · Belawan 29 km · Labuhan Deli 35 km · Percut 42 km · Berastagi 45 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 Binjai (3.6001°, 98.4854°, elevation 34 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).