Rantauprapat weather in May

In May, Rantauprapat sees average daytime highs of 31°C and overnight lows near 23°C, with 212 mm of rain across 26.5 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 8th-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 3% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is Rantauprapat's 6th-clearest and 6th-windiest month. For the whole year in context, see Rantauprapat's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
23°
12th coldest
Rainfall
212 mm
26.5 wet days
Daylight
12 h 06 min
6:14 AM – 6:20 PM
Cloud cover
86%
6th clearest
Wind
3 km/h
6th windiest
Solar energy
4.86 kWh/m²
Travel score
2.7
out of 10

Rantauprapat is capital of Labuhanbatu Regency, Indonesia.

Founded
1991

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 31°C through the month.

A typical May day in Rantauprapat reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How May really feels in Rantauprapat

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.

Rantauprapat weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°23127.111.93.0
Feb30° / 22°18223.811.92.9
Mar31° / 22°22827.6122.6
Apr31° / 23°25428.4122.4
May31° / 23°21226.512.12.7
Jun31° / 23°15020.812.13.1
Jul31° / 22°15821.312.13.1
Aug31° / 22°19324.512.12.8
Sep31° / 22°25826.5122.7
Oct30° / 22°29928.5122.7
Nov30° / 22°34429.211.92.6
Dec29° / 22°32328.911.92.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 8% of May, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3595
4694
5694
6694
7694
8892
9892
10991
111090
121090
131189
141189
151387
161387
171387
181486
191486
201486
211585
221585
231585
241585
251585
261585
271486
281387
291486
301486
311486

Chance of precipitation in May

Any precipitation

Rantauprapat gets around 212 mm of rain over 26.5 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 85% 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
293
393
492
591
690
789
888
987
1086
1185
1285
1384
1483
1583
1682
1782
1882
1982
2082
2182
2282
2383
2483
2582
2682
2782
2882
2981
3081
3180

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
107030
207030
306931
406931
506931
606931
706931
806931
906931
1016831
1116930
1216930
1317029
1417029
1517128
1617128
1717227
1817227
1917227
2017326
2117326
2217425
2317524
2417524
2517623
2607723
2707822
2807822
2907921
3017821
3117920

Wind in May

Winds average 3 km/h in May.

Across May, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 06 min 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 0 minutes over May. Sunrise moves from 6:16 AM to 6:15 AM, and sunset from 6:20 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:166:20
212.16:166:20
312.16:156:20
412.16:156:20
512.16:156:20
612.16:156:20
712.16:156:20
812.16:156:20
912.16:156:20
1012.16:146:20
1112.16:146:20
1212.16:146:20
1312.16:146:20
1412.16:146:20
1512.16:146:20
1612.16:146:20
1712.16:146:20
1812.16:146:20
1912.16:146:20
2012.16:146:20
2112.16:146:20
2212.16:146:20
2312.16:146:20
2412.16:146:20
2512.16:146:21
2612.16:146:21
2712.16:146:21
2812.16:146:21
2912.16:156:21
3012.16:156:21
3112.16:156:21

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.86 kWh/m².

For context, solar energy here swings from a low near 4.03 kWh/m² to a high of 5.15 kWh/m² in March across the year — May's 4.86 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Is May a good time to visit Rantauprapat?

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

2.7
Sightseeing
7th-best month of the year
4.0
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Rantauprapat.

What to pack for Rantauprapat in May

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

In May, Rantauprapat sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Rantauprapat 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 68 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 Rantauprapat 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 Rantauprapat 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 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeFeb 21UV 14Jun 19UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun10Very high
Jul11Extreme
Aug11Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in Rantauprapat 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 Rantauprapat is worst in October — around 37 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateOct 1037 µg/m³Dec 1725 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb30Moderate
Mar33Moderate
Apr31Moderate
May29Moderate
Jun27Moderate
Jul30Moderate
Aug32Moderate
Sep36Poor
Oct37Poor
Nov26Moderate
Dec25Moderate
Location & terrain

Where is Rantauprapat?

Rantauprapat sits at 2.1°N, 99.8°E, 29 m above sea level, in Indonesia. The nearest listed city is Bandar, 11 km away.

Topography around Rantauprapat

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

Within 3 km, the terrain around Rantauprapat has only modest variations in elevation — a maximum elevation change of 152 m around an average of 39 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 434 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,230 m.

The land around Rantauprapat is covered by trees (65%) and artificial surfaces (30%) within 3 km, trees (96%) within 16 km, and trees (87%) within 80 km.

3 km
152 m
16 km
434 m
80 km
2,230 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Bandar 11 km · Tanjungbalai 96 km · Tarutung 97 km · Teluk Nibung 100 km · Kisaran 101 km · Padangsidempuan 102 km · Sibolga 124 km · Pematangsiantar 128 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 Rantauprapat (2.1°, 99.8333°, elevation 29 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).