Semarang weather in May

In May, Semarang sees average daytime highs of 32°C and overnight lows near 24°C, with 102 mm of rain across 16.4 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 Semarang's 5th-clearest and 9th-windiest month. For the whole year in context, see Semarang's year-round climate.

Daytime high
32°
7th warmest
Overnight low
24°
10th coldest
Rainfall
102 mm
16.4 wet days
Daylight
11 h 42 min
5:44 AM – 5:25 PM
Cloud cover
62%
5th clearest
Wind
5 km/h
9th windiest
Solar energy
5.16 kWh/m²
Travel score
3.5
out of 10

Semarang is city in Central Java Province, Indonesia.

Density
4,534/km²
people per km²
Founded
1547

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 32°C through the month.

A typical May day in Semarang 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 30°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 Semarang

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.

Semarang 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
Jan30° / 24°39129.912.42.7
Feb30° / 24°35427.212.22.7
Mar30° / 24°34529.3122.6
Apr31° / 24°2372611.92.7
May32° / 24°10216.411.73.5
Jun32° / 24°6010.511.64.0
Jul32° / 23°386.511.64.3
Aug33° / 23°23411.84.2
Sep33° / 24°446.1123.7
Oct33° / 24°13915.312.23.0
Nov32° / 24°28225.612.32.5
Dec30° / 24°41629.212.42.6

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 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33466
43565
53565
63565
73763
83763
93961
104060
114159
124258
134456
144555
154753
164951
175050
185149
195248
205347
215446
225446
235545
245446
255446
265545
275446
285347
295248
305248
315149

Chance of precipitation in May

Any precipitation

Semarang gets around 102 mm of rain over 16.4 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 53% and peaks near 70% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
170
269
368
466
565
663
762
860
959
1057
1156
1255
1354
1453
1552
1651
1750
1850
1949
2048
2148
2247
2347
2446
2546
2645
2745
2844
2944
3043
3143

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
105446
205446
305446
415445
515544
615544
715643
825642
925741
1025741
1135740
1235839
1345838
1445937
1555936
1656035
1756134
1866133
1966232
2066331
2176330
2276429
2376528
2486527
2586527
2696526
2796625
2896724
29106723
30106822
31106921

Wind in May

Winds average 5 km/h in May.

Across May, 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 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 5:43 AM to 5:47 AM, and sunset from 5:28 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:435:28
211.85:435:28
311.75:435:28
411.75:435:27
511.75:435:27
611.75:435:27
711.75:435:27
811.75:435:26
911.75:435:26
1011.75:435:26
1111.75:435:26
1211.75:445:26
1311.75:445:25
1411.75:445:25
1511.75:445:25
1611.75:445:25
1711.75:445:25
1811.75:445:25
1911.75:455:25
2011.75:455:25
2111.75:455:25
2211.75:455:25
2311.75:455:24
2411.65:455:24
2511.65:465:24
2611.65:465:24
2711.65:465:24
2811.65:465:24
2911.65:465:24
3011.65:475:24
3111.65:475:25

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.16 kWh/m².

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 6.31 kWh/m² in September across the year — May's 5.16 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
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Semarang

In seasonPeak

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

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

Semarang's monsoon runs November–April, when most of the year's rain falls.

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

Is May a good time to visit Semarang?

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

3.5
Sightseeing
5th-best month of the year
5.5
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Semarang.

What to pack for Semarang in May

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

In May, Semarang 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 Semarang 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 14 km away) is warmest in May at about 30°C and coldest in February 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
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Semarang in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Semarang peaks around March 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 14 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highExtremeMar 15UV 14Nov 14UV 7
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct10Very high
Nov7High
Dec12Extreme

Air quality in Semarang 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 Semarang is worst in May — around 45 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorMay 1445 µg/m³Feb 1131 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb30Moderate
Mar38Poor
Apr43Poor
May45Poor
Jun41Poor
Jul36Poor
Aug36Poor
Sep38Poor
Oct39Poor
Nov38Poor
Dec34Moderate
Location & terrain

Where is Semarang?

Semarang sits at 7.0°S, 110.4°E, 18 m above sea level, in Indonesia. The nearest listed city is Mranggen, 11 km away.

Topography around Semarang

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

Within 3 km, the terrain around Semarang has only modest variations in elevation — a maximum elevation change of 133 m around an average of 26 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 616 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,293 m.

The land around Semarang is covered by artificial surfaces (84%) within 3 km, water (31%), trees (30%) and artificial surfaces (25%) within 16 km, and trees (48%) and water (25%) within 80 km.

3 km
133 m
16 km
616 m
80 km
3,293 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Mranggen 11 km · Ungaran 16 km · Demak 27 km · Ambarawa 30 km · Salatiga 39 km · Welahan 39 km · Weleri 39 km · Pecangaan 46 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 Semarang (-6.9931°, 110.4208°, elevation 18 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).