Sorong weather in September

In September, Sorong sees average daytime highs of 30°C and overnight lows near 23°C, with 249 mm of rain across 23.1 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 30°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Sorong's 4th-clearest and 3rd-windiest month. For the whole year in context, see Sorong's year-round climate.

Daytime high
30°
4th warmest
Overnight low
23°
3rd coldest
Rainfall
249 mm
23.1 wet days
Daylight
12 hours
6:09 AM – 6:09 PM
Cloud cover
82%
4th clearest
Wind
7 km/h
3rd windiest
Solar energy
4.9 kWh/m²
Travel score
3.4
out of 10

Sorong is city in Southwest Papua Province, Indonesia.

Density
199/km²
people per km²
Founded
2000

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Sorong reaches about 30°C in the afternoon and slips back to 23°C overnight — a 6°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, 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
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023

How September really feels in Sorong

Once humidity and wind are folded in, September averages 30 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
30
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.

Sorong 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°30627.7122.9
Feb29° / 24°26224.4123.0
Mar30° / 24°34228.5122.9
Apr30° / 24°37429122.7
May30° / 24°31428.2122.9
Jun29° / 24°30225.7123.2
Jul29° / 23°26023.7123.7
Aug29° / 23°22620.4123.9
Sep30° / 23°24923.1123.4
Oct30° / 24°27224.7123.1
Nov30° / 24°29927.5122.8
Dec30° / 24°34429.7122.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21288
31288
41288
51189
61189
71090
81090
91090
101090
111090
121090
131090
141090
151189
161189
171189
181189
191288
201288
211387
221486
231486
241486
251387
261387
271486
281486
291486
301486

Chance of precipitation in September

Any precipitation

Sorong gets around 249 mm of rain over 23.1 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 76% and peaks near 77% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
176
276
377
477
577
677
777
877
977
1077
1177
1276
1376
1476
1575
1675
1775
1875
1975
2075
2175
2275
2376
2476
2576
2676
2776
2877
2977
3077

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 76% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
138314
238314
338314
438314
538215
648115
748115
848115
948115
1057916
1157916
1257916
1357817
1457817
1557817
1657718
1757619
1857619
1957520
2057421
2157322
2257223
2347224
2447125
2547026
2637027
2736928
2836829
2926830
3026632

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:15 AM to 6:04 AM, and sunset from 6:14 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:156:14
212.06:156:14
312.06:146:14
412.06:146:13
512.06:146:13
612.06:136:13
712.06:136:12
812.06:136:12
912.06:126:12
1012.06:126:11
1112.06:116:11
1212.06:116:11
1312.06:116:10
1412.06:106:10
1512.06:106:09
1612.06:096:09
1712.06:096:09
1812.06:096:08
1912.06:086:08
2012.06:086:08
2112.06:076:07
2212.06:076:07
2312.06:076:07
2412.06:066:06
2512.06:066:06
2612.06:066:06
2712.06:056:05
2812.06:056:05
2912.06:046:05
3012.06:046:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.9 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 5.05 kWh/m² in October across the year — September's 4.9 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Sorong?

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

3.4
Sightseeing
3rd-best month of the year
4.6
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Sorong.

What to pack for Sorong in September

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

In September, Sorong sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Sorong 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 at the nearest coast (about 15 km away) is warmest in November 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
Apr29Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct30Tropical
Nov30Tropical
Dec30Tropical

UV index in Sorong in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sorong peaks around March 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 16Jul 12UV 12
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar16Extreme
Apr15Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep14Extreme
Oct15Extreme
Nov13Extreme
Dec12Extreme
Location & terrain

Where is Sorong?

Sorong sits at 0.9°S, 131.3°E, 7 m above sea level, in Indonesia. The nearest listed city is Teminabuan, 104 km away.

BintuniManokwariRansikiMasohiAmahai

Topography around Sorong

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

Within 3 km, the terrain around Sorong has only modest variations in elevation — a maximum elevation change of 157 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 441 m; within 80 km, large variations in elevation — a maximum elevation change of 1,165 m.

The land around Sorong is covered by water (44%) and trees (33%) within 3 km, water (57%) and trees (32%) within 16 km, and water (51%) and trees (45%) within 80 km.

3 km
157 m
16 km
441 m
80 km
1,165 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Teminabuan 104 km · Waisai 110 km · Fakfak 255 km · Bintuni 286 km · Manokwari 312 km · Ransiki 331 km · Masohi 370 km · Amahai 378 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 Sorong (-0.8796°, 131.261°, elevation 7 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).