Tanjung Balai weather in May

In May, Tanjung Balai sees average daytime highs of 29°C and overnight lows near 27°C, with 232 mm of rain across 26.7 wet days and about 12 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 12% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is Tanjung Balai's 7th-clearest and 10th-windiest month. For the whole year in context, see Tanjung Balai's year-round climate.

Daytime high
29°
1st warmest
Overnight low
27°
11th coldest
Rainfall
232 mm
26.7 wet days
Daylight
12 hours
6:01 AM – 6:04 PM
Cloud cover
76%
7th clearest
Wind
12 km/h
10th windiest
Solar energy
5.06 kWh/m²
Travel score
3.4
out of 10

Tanjung Balai is capital of Karimun Regency, Riau Islands, Indonesia.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical May day in Tanjung Balai reaches about 29°C in the afternoon and slips back to 27°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, May runs on par with April and on par with June.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12927
22927
32927
42927
52927
62927
72927
82927
92927
102927
112927
122927
132927
142927
152927
162927
172927
182927
192927
202927
212927
222927
232927
242927
252927
262927
272927
282927
292927
302927
312927

How May really feels in Tanjung Balai

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

Tanjung Balai weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 26°17418.611.94.9
Feb28° / 26°9813.3125.5
Mar28° / 26°16721.3124.4
Apr29° / 26°22026.4123.4
May29° / 27°23226.7123.4
Jun29° / 27°19122.512.13.8
Jul29° / 27°18622.512.14.0
Aug28° / 26°17422.8124.0
Sep28° / 26°16721.5124.1
Oct28° / 26°22024.6123.7
Nov28° / 26°32928.1123.5
Dec27° / 26°31925.811.93.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32278
42377
52377
62278
72179
82278
92278
102278
112377
122377
132377
142377
152476
162476
172575
182773
192773
202773
212773
222773
232872
242872
252872
262872
272872
282872
292773
302773
312773

Chance of precipitation in May

Any precipitation

Tanjung Balai gets around 232 mm of rain over 26.7 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
190
290
390
490
589
689
788
888
987
1087
1186
1285
1385
1485
1584
1684
1784
1884
1984
2084
2184
2285
2385
2485
2585
2685
2785
2885
2985
3084
3184

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11684
21585
31486
41486
51387
61387
71387
81387
91387
101387
111387
121387
131387
141387
151288
161288
171288
181288
191288
201288
211387
221387
231387
241486
251486
261486
271585
281585
291684
301684
311783

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1512calm
1612calm
1712calm
1812calm
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 hours at the start of May to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 6:02 AM to 6:02 AM, and sunset from 6:05 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:026:05
212.06:026:04
312.06:026:04
412.06:026:04
512.06:026:04
612.06:026:04
712.06:026:04
812.06:026:04
912.06:026:04
1012.06:016:04
1112.06:016:04
1212.06:016:04
1312.06:016:04
1412.06:016:04
1512.06:016:04
1612.06:016:04
1712.06:016:04
1812.06:016:04
1912.06:016:04
2012.06:016:04
2112.06:016:04
2212.06:016:04
2312.06:016:04
2412.06:016:04
2512.16:026:05
2612.16:026:05
2712.16:026:05
2812.16:026:05
2912.16:026:05
3012.16:026:05
3112.16:026:05

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.06 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 5.79 kWh/m² in March across the year — May's 5.06 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Is May a good time to visit Tanjung Balai?

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

3.4
Sightseeing
11th-best month of the year
4.3
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Tanjung Balai.

What to pack for Tanjung Balai in May

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

In May, Tanjung Balai sees daytime highs around 29°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Tanjung Balai in May

The nearest coast averages about 30°C in May — 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 May at about 30°C and coldest in January 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
Nov29Tropical
Dec29Tropical

UV index in Tanjung Balai in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Tanjung Balai peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeFeb 18UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Very high
Jul10Extreme
Aug13Extreme
Sep12Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Tanjung Balai in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tanjung Balai is worst in September — around 45 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (January, 26 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateSep 1845 µg/m³Jan 1026 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb29Moderate
Mar39Poor
Apr35Moderate
May29Moderate
Jun26Moderate
Jul31Moderate
Aug37Poor
Sep45Poor
Oct40Poor
Nov31Moderate
Dec26Moderate
Location & terrain

Where is Tanjung Balai?

Tanjung Balai sits at 1.0°N, 103.4°E, 9 m above sea level, in Indonesia. The nearest listed city is Boon Lay, 46 km away.

Topography around Tanjung Balai

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

Within 3 km, the terrain around Tanjung Balai has only modest variations in elevation — a maximum elevation change of 37 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 480 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Tanjung Balai is covered by water (47%) and artificial surfaces (25%) within 3 km, water (72%) within 16 km, and water (60%) and trees (28%) within 80 km.

3 km
37 m
16 km
480 m
80 km
656 m
treesshrubsgrasslandartificial surfacesbare terrainwatermangroves
May weather nearby: Boon Lay 46 km · Iskandar Puteri 49 km · Jurong Town 50 km · Jurong East 51 km · Jurong West 51 km · Clementi Housing Estate 52 km · Hong Kah 52 km · Telok Blangah 53 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 Tanjung Balai (1.0001°, 103.4219°, 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).