Sidareja weather in September

In September, Sidareja sees average daytime highs of 28°C and overnight lows near 23°C, with 81 mm of rain across 12.2 wet days and about 12 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 10% 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 Sidareja's 5th-clearest and 2nd-windiest month. For the whole year in context, see Sidareja's year-round climate.

Daytime high
28°
10th warmest
Overnight low
23°
3rd coldest
Rainfall
81 mm
12.2 wet days
Daylight
12 hours
5:40 AM – 5:38 PM
Cloud cover
68%
5th clearest
Wind
9 km/h
2nd windiest
Solar energy
5.16 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Sidareja reaches about 28°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52822
62822
72822
82822
92822
102822
112822
122822
132822
142822
152823
162823
172823
182823
192823
202823
212823
222823
232823
242823
252823
262823
272823
282823
292823
302823

How September really feels in Sidareja

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sidareja weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°33228.412.42.8
Feb30° / 24°3032712.22.7
Mar30° / 24°29428.412.12.8
Apr30° / 24°23026.111.83.0
May30° / 24°14820.611.73.9
Jun29° / 23°10316.211.64.8
Jul28° / 22°7112.711.65.9
Aug27° / 22°529.211.86.5
Sep28° / 23°8112.2125.7
Oct29° / 23°17419.212.24.3
Nov29° / 24°28925.912.33.2
Dec29° / 24°31928.312.42.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
23961
33961
43961
53961
63961
73961
83763
93763
103763
113664
123664
133565
143565
153466
163466
173268
183268
193169
203169
213070
223070
233070
242971
252971
262971
272872
282872
292773
302773

Chance of precipitation in September

Any precipitation

Sidareja gets around 81 mm of rain over 12.2 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 41% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
132
233
334
435
536
637
737
838
939
1039
1140
1241
1341
1442
1542
1643
1743
1843
1944
2044
2144
2244
2345
2445
2545
2646
2746
2847
2948
3048

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1337591
2336601
3335611
4335611
5335611
6234631
7234631
8234631
9234631
10233641
11233641
12232651
13132661
14131662
15131662
16130672
17129682
18129682
19128692
20027703
21027703
22026713
23026713
24025723
25025714
26024724
27024724
28023734
29022744
30022744

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:49 AM to 5:32 AM, and sunset from 5:40 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:495:40
211.95:485:40
311.95:485:40
411.95:475:40
511.95:475:40
611.95:465:40
711.95:465:39
811.95:455:39
911.95:445:39
1011.95:445:39
1111.95:435:39
1211.95:435:39
1311.95:425:38
1411.95:425:38
1512.05:415:38
1612.05:405:38
1712.05:405:38
1812.05:395:38
1912.05:395:37
2012.05:385:37
2112.05:375:37
2212.05:375:37
2312.05:365:37
2412.05:365:37
2512.05:355:37
2612.05:355:36
2712.05:345:36
2812.05:335:36
2912.15:335:36
3012.15:325:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.16 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 5.16 kWh/m² in September across the year — September's 5.16 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
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
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Sidareja

In seasonPeak

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

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

Sidareja's rainy season runs October–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 Sidareja?

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

5.7
Sightseeing
3rd-best month of the year
6.2
Beach & pool
3rd-best month of the year

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

What to pack for Sidareja in September

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

In September, Sidareja sees daytime highs around 28°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Sidareja in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 44 km away) is warmest in April at about 29°C and coldest in August near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Warm
Dec29Tropical

UV index in Sidareja 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 Sidareja peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 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 highExtremeExtremeMar 12UV 15Jun 15UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun7High
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov9Very high
Dec12Extreme

Air quality in Sidareja 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 Sidareja is worst in May — around 46 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMay 1545 µg/m³Sep 1630 µg/m³
PM2.5 (µg/m³)Level
Jan39Poor
Feb39Poor
Mar41Poor
Apr44Poor
May46Poor
Jun43Poor
Jul37Poor
Aug31Moderate
Sep30Moderate
Oct31Moderate
Nov32Moderate
Dec33Moderate
Location & terrain

Where is Sidareja?

Sidareja sits at 7.5°S, 108.8°E, 8 m above sea level, in Indonesia. The nearest listed city is Majenang, 21 km away.

Topography around Sidareja

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

Within 3 km, the terrain around Sidareja has only modest variations in elevation — a maximum elevation change of 77 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 437 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Sidareja is covered by cropland (46%) and trees (37%) within 3 km, trees (51%) and cropland (42%) within 16 km, and trees (53%) and water (26%) within 80 km.

3 km
77 m
16 km
437 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Majenang 21 km · Wangon 29 km · Cilacap 36 km · Purwokerto 49 km · Margasari 50 km · Baturaden 51 km · Ciamis 52 km · Kroya 53 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 Sidareja (-7.4846°, 108.7923°, elevation 8 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).