Slawi weather in May

In May, Slawi sees average daytime highs of 30°C and overnight lows near 24°C, with 166 mm of rain across 22.1 wet days and about 11.7 hours of daylight. It is the 1st-warmest and 8th-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 12% 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 Slawi's 5th-clearest and 11th-windiest month. For the whole year in context, see Slawi's year-round climate.

Daytime high
30°
1st warmest
Overnight low
24°
11th coldest
Rainfall
166 mm
22.1 wet days
Daylight
11 h 42 min
5:49 AM – 5:30 PM
Cloud cover
69%
5th clearest
Wind
4 km/h
11th windiest
Solar energy
4.98 kWh/m²
Travel score
3.7
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in Slawi reaches about 30°C in the afternoon and slips back to 24°C overnight — a 5°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, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
282924
292924
302924
312924

How May really feels in Slawi

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.

Slawi weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°47230.412.42.9
Feb29° / 24°44327.712.22.8
Mar29° / 24°41530.5122.8
Apr30° / 24°31228.111.92.9
May30° / 24°16622.111.73.7
Jun29° / 24°9915.111.64.7
Jul29° / 23°6410.811.65.6
Aug29° / 22°397.511.85.9
Sep29° / 23°6310125.2
Oct30° / 24°17119.812.23.9
Nov29° / 24°35027.412.33.0
Dec29° / 24°45929.912.42.8

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 23% of May, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22476
32575
42575
52575
62773
72773
82872
92872
103070
113070
123268
133367
143565
153763
163862
174060
184060
194159
204258
214357
224357
234456
244456
254456
264555
274456
284357
294357
304357
314258

Chance of precipitation in May

Any precipitation

Slawi gets around 166 mm of rain over 22.1 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 71% and peaks near 85% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
185
284
383
482
581
680
779
878
977
1076
1175
1274
1372
1471
1570
1669
1768
1867
1966
2065
2165
2264
2364
2464
2563
2663
2763
2862
2962
3062
3162

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 75% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
107327
207327
317227
417227
517128
617128
717128
827127
927127
1027127
1127226
1227226
1327325
1427325
1527424
1627523
1737423
1837522
1937522
2037621
2137720
2237720
2337819
2437819
2537918
2637918
2737918
2838017
2938017
3038017
3138116

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

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 5:48 AM to 5:52 AM, and sunset from 5:33 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:485:33
211.85:485:33
311.75:485:33
411.75:485:33
511.75:485:32
611.75:485:32
711.75:485:32
811.75:485:32
911.75:485:31
1011.75:485:31
1111.75:495:31
1211.75:495:31
1311.75:495:31
1411.75:495:30
1511.75:495:30
1611.75:495:30
1711.75:495:30
1811.75:495:30
1911.75:505:30
2011.75:505:30
2111.75:505:30
2211.75:505:30
2311.75:505:30
2411.75:515:30
2511.65:515:30
2611.65:515:30
2711.65:515:30
2811.65:515:30
2911.65:525:30
3011.65:525:30
3111.65:525:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.98 kWh/m².

For context, solar energy here swings from a low near 4.67 kWh/m² to a high of 5.95 kWh/m² in September across the year — May's 4.98 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in May

Hazard calendar for Slawi

In seasonPeak

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

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

Slawi'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 Slawi?

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

3.7
Sightseeing
6th-best month of the year
5.0
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Slawi.

What to pack for Slawi in May

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

In May, Slawi sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Slawi 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 offshore 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
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Slawi in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Slawi peaks around March 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 16 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 15UV 14Nov 16UV 6
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov6High
Dec12Extreme

Air quality in Slawi 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 Slawi is worst in May — around 42 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateMay 1641 µg/m³Feb 1231 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb31Moderate
Mar37Poor
Apr38Poor
May42Poor
Jun38Poor
Jul35Moderate
Aug35Moderate
Sep36Poor
Oct37Poor
Nov34Moderate
Dec33Moderate
Location & terrain

Where is Slawi?

Slawi sits at 7.0°S, 109.1°E, 43 m above sea level, in Indonesia. The nearest listed city is Adiwerna, 5.0 km away.

Topography around Slawi

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

Within 3 km, the terrain around Slawi has only modest variations in elevation — a maximum elevation change of 45 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 764 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Slawi is covered by artificial surfaces (37%), trees (36%) and cropland (21%) within 3 km, cropland (37%) and trees (35%) within 16 km, and trees (47%) and water (29%) within 80 km.

3 km
45 m
16 km
764 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Adiwerna 5.0 km · Tarub 6.0 km · Lebaksiu 8.0 km · Balapulang 9.0 km · Dukuhturi 11 km · Tegal 12 km · Margasari 18 km · Bulakamba 24 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 Slawi (-6.9816°, 109.1407°, elevation 43 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).