Adiwerna weather in September

In September, Adiwerna sees average daytime highs of 29°C and overnight lows near 23°C, with 63 mm of rain across 10 wet days and about 12 hours of daylight. It is the 4th-warmest and 11th-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 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Adiwerna's 3rd-clearest and 1st-windiest month. For the whole year in context, see Adiwerna's year-round climate.

Daytime high
29°
4th warmest
Overnight low
23°
3rd coldest
Rainfall
63 mm
10 wet days
Daylight
12 hours
5:39 AM – 5:37 PM
Cloud cover
62%
3rd clearest
Wind
5 km/h
1st windiest
Solar energy
5.95 kWh/m²
Travel score
5.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Adiwerna reaches about 29°C in the afternoon and slips back to 23°C overnight — a 7°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, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12923
22923
32923
42923
52923
62923
72923
82923
92923
102923
112923
122923
132923
142923
152923
162923
172923
182923
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023

How September really feels in Adiwerna

Once humidity and wind are folded in, September averages 15 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
15
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Adiwerna weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-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 September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
34951
44951
55050
65050
75050
85050
94951
104951
114951
124852
134852
144654
154555
164555
174555
184456
194456
204456
214357
224357
234357
244357
254357
264258
274159
284159
294159
303961

Chance of precipitation in September

Any precipitation

Adiwerna gets around 63 mm of rain over 10 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
131
231
332
431
531
631
731
831
931
1031
1131
1231
1331
1431
1531
1632
1732
1833
1934
2034
2135
2236
2337
2438
2539
2640
2741
2842
2943
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1545501
2544501
3544501
4443521
5443530
6442540
7442540
8442540
9442540
10441550
11341560
12341560
13341560
14341560
15340570
16240580
17240580
18240580
19240580
20240580
21239590
22139600
23139600
24140590
25140590
26139600
27139600
28139600
29038620
30038620

Wind in September

Winds average 5 km/h in September, the windiest month of the year.

Across September, 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.

0246810151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over September. Sunrise moves from 5:47 AM to 5:31 AM, and sunset from 5:39 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:475:39
211.95:475:39
311.95:465:39
411.95:465:39
511.95:455:39
611.95:455:38
711.95:445:38
811.95:435:38
911.95:435:38
1011.95:425:38
1111.95:425:38
1211.95:415:37
1311.95:415:37
1411.95:405:37
1512.05:395:37
1612.05:395:37
1712.05:385:36
1812.05:385:36
1912.05:375:36
2012.05:375:36
2112.05:365:36
2212.05:365:36
2312.05:355:35
2412.05:345:35
2512.05:345:35
2612.05:335:35
2712.05:335:35
2812.05:325:35
2912.05:325:35
3012.15:315:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.95 kWh/m² — the sunniest month for solar.

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 — September's 5.95 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Bright
176.0Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Adiwerna

In seasonPeak

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

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

Adiwerna'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 September a good time to visit Adiwerna?

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

5.2
Sightseeing
3rd-best month of the year
6.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Adiwerna for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Adiwerna in September

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

In September, Adiwerna sees daytime highs around 29°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Adiwerna in September

The nearest coast averages about 29°C in September — 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 Adiwerna in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Adiwerna 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 Adiwerna in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Adiwerna 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 Adiwerna?

Adiwerna sits at 6.9°S, 109.1°E, 23 m above sea level, in Indonesia. The nearest listed city is Tarub, 4.0 km away.

Topography around Adiwerna

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

Within 3 km, the terrain around Adiwerna has only modest variations in elevation — a maximum elevation change of 29 m around an average of 21 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 613 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Adiwerna is covered by artificial surfaces (49%) and trees (25%) within 3 km, cropland (36%) and trees (24%) within 16 km, and trees (46%) and water (31%) within 80 km.

3 km
29 m
16 km
613 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Tarub 4.0 km · Slawi 5.0 km · Dukuhturi 7.0 km · Tegal 8.0 km · Lebaksiu 13 km · Balapulang 13 km · Bulakamba 21 km · Margasari 21 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 Adiwerna (-6.9375°, 109.1325°, elevation 23 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).