Cepu weather in May

In May, Cepu sees average daytime highs of 32°C and overnight lows near 24°C, with 108 mm of rain across 15.7 wet days and about 11.7 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 36 min by month's end. Set against the rest of the year, May is Cepu's 5th-clearest and 10th-windiest month. For the whole year in context, see Cepu's year-round climate.

Daytime high
32°
7th warmest
Overnight low
24°
9th coldest
Rainfall
108 mm
15.7 wet days
Daylight
11 h 42 min
5:40 AM – 5:20 PM
Cloud cover
63%
5th clearest
Wind
5 km/h
10th windiest
Solar energy
5.19 kWh/m²
Travel score
3.5
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Cepu reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 31°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)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224
313224

How May really feels in Cepu

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.

Cepu weather by month

How May compares with the rest of the year at a glance. May is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°32028.712.42.4
Feb31° / 24°31726.912.22.3
Mar32° / 24°31728.6122.3
Apr32° / 24°23324.911.82.6
May32° / 24°10815.711.73.5
Jun32° / 23°609.611.63.9
Jul32° / 23°315.111.64.2
Aug33° / 22°132.611.84.2
Sep34° / 23°304.5123.5
Oct34° / 24°11812.112.22.8
Nov33° / 24°26823.112.32.3
Dec32° / 24°33227.712.42.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33466
43466
53466
63466
73466
83664
93763
103763
113961
124159
134258
144456
154654
164753
174852
185050
195149
205248
215347
225347
235446
245446
255545
265446
275446
285347
295347
305248
315149

Chance of precipitation in May

Any precipitation

Cepu gets around 108 mm of rain over 15.7 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 50% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
165
264
363
462
561
660
758
857
956
1055
1154
1253
1352
1451
1550
1649
1748
1848
1947
2046
2145
2245
2344
2443
2543
2642
2741
2841
2940
3040
3140

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
104159
214257
314257
414356
524454
624454
724553
834552
934651
1034651
1144749
1244848
1354847
1454946
1565044
1665143
1775142
1875241
1985240
2085339
2185438
2295437
2395536
2495635
25105634
26105832
27115831
28115930
29125929
30126028
31126127

Wind in May

Winds average 5 km/h in May.

Across May, 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
14calm
24calm
34calm
44calm
54calm
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 May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 5:38 AM to 5:42 AM, and sunset from 5:23 PM to 5:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:385:23
211.75:385:23
311.75:385:23
411.75:385:23
511.75:385:22
611.75:395:22
711.75:395:22
811.75:395:22
911.75:395:21
1011.75:395:21
1111.75:395:21
1211.75:395:21
1311.75:395:21
1411.75:395:20
1511.75:395:20
1611.75:405:20
1711.75:405:20
1811.75:405:20
1911.75:405:20
2011.75:405:20
2111.75:405:20
2211.65:415:20
2311.65:415:20
2411.65:415:20
2511.65:415:19
2611.65:415:19
2711.65:425:19
2811.65:425:19
2911.65:425:20
3011.65:425:20
3111.65:425:20

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.19 kWh/m².

For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 6.48 kWh/m² in September across the year — May's 5.19 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in May

Hazard calendar for Cepu

In seasonPeak

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

Cepu sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cepu's rainy season runs November–April, when most of the year's rain falls.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Cepu?

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

3.5
Sightseeing
4th-best month of the year
5.6
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Cepu.

What to pack for Cepu in May

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

In May, Cepu sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Cepu 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 58 km away) is warmest in November at about 30°C and coldest in August 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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Cepu in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cepu peaks around March 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highMar 17UV 13Jun 15UV 8
UV index (midday)Level
Jan12Extreme
Feb10Extreme
Mar13Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov9Very high
Dec10Very high

Air quality in Cepu 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 Cepu is worst in May — around 64 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorMay 1764 µg/m³Dec 2343 µg/m³
PM2.5 (µg/m³)Level
Jan44Poor
Feb45Poor
Mar53Poor
Apr59Unhealthy
May64Unhealthy
Jun60Unhealthy
Jul54Poor
Aug48Poor
Sep47Poor
Oct49Poor
Nov48Poor
Dec43Poor
Location & terrain

Where is Cepu?

Cepu sits at 7.1°S, 111.6°E, 36 m above sea level, in Indonesia. The nearest listed city is Blora, 27 km away.

Topography around Cepu

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

Within 3 km, the terrain around Cepu has only modest variations in elevation — a maximum elevation change of 65 m around an average of 36 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 267 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,224 m.

The land around Cepu is covered by cropland (33%), trees (31%) and artificial surfaces (24%) within 3 km, trees (46%) and cropland (37%) within 16 km, and trees (42%) and cropland (34%) within 80 km.

3 km
65 m
16 km
267 m
80 km
3,224 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Blora 27 km · Bojonegoro 32 km · Ngawi 33 km · Lasem 53 km · Madiun 54 km · Rembangan 56 km · Tuban 59 km · Nganjuk 61 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 Cepu (-7.1475°, 111.5906°, elevation 36 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).