Ransiki weather in September

In September, Ransiki sees average daytime highs of 29°C and overnight lows near 24°C, with 197 mm of rain across 24.7 wet days and about 12 hours of daylight. It is the 2nd-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 13% 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 Ransiki's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Ransiki's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
24°
6th coldest
Rainfall
197 mm
24.7 wet days
Daylight
12 hours
5:58 AM – 5:57 PM
Cloud cover
71%
2nd clearest
Wind
6 km/h
3rd windiest
Solar energy
5.65 kWh/m²
Travel score
3.7
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 Ransiki reaches about 29°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 27°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)
12824
22824
32824
42824
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172924
182924
192924
202924
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924

Ransiki weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°56529.412.13.4
Feb28° / 24°51526.1123.4
Mar28° / 24°64729.8123.3
Apr28° / 24°57329123.1
May28° / 24°29928.611.93.3
Jun28° / 24°22126.311.93.7
Jul28° / 24°19825.111.94.0
Aug28° / 24°17523.5124.0
Sep29° / 24°19724.7123.7
Oct29° / 24°23126.5123.5
Nov29° / 24°3422812.13.1
Dec28° / 24°58230.212.13.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33268
43169
53070
63070
73070
82971
93070
103070
113070
123070
133070
143268
153367
163367
173367
183367
193367
203367
213367
223367
233367
243367
253367
263268
273268
283268
293268
303268

Chance of precipitation in September

Any precipitation

Ransiki gets around 197 mm of rain over 24.7 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 82% and peaks near 83% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
182
282
382
483
583
683
783
883
983
1082
1182
1282
1382
1482
1582
1682
1782
1882
1982
2082
2182
2282
2382
2482
2582
2682
2783
2883
2983
3083

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 93% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
106940
205950
305950
405950
505950
606940
706940
806940
906940
1007930
1117920
1217920
1317920
1417920
1517920
1617920
1717920
1817920
1917920
2016930
2116921
2216921
2316921
2416921
2506931
2605941
2705941
2805941
2905950
3005950

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:04 AM to 5:52 AM, and sunset from 6:02 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:046:02
212.06:046:02
312.06:036:02
412.06:036:01
512.06:026:01
612.06:026:01
712.06:026:00
812.06:016:00
912.06:016:00
1012.06:005:59
1112.06:005:59
1212.06:005:59
1312.05:595:58
1412.05:595:58
1512.05:585:58
1612.05:585:57
1712.05:575:57
1812.05:575:57
1912.05:575:56
2012.05:565:56
2112.05:565:56
2212.05:555:55
2312.05:555:55
2412.05:555:55
2512.05:545:54
2612.05:545:54
2712.05:535:54
2812.05:535:54
2912.05:535:53
3012.05:525:53

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.65 kWh/m².

For context, solar energy here swings from a low near 4.8 kWh/m² to a high of 5.78 kWh/m² in October across the year — September's 5.65 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Ransiki

In seasonPeak

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

Ransiki's rainy season runs November–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Ransiki?

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

3.7
Sightseeing
3rd-best month of the year
4.5
Beach & pool
2nd-best month of the year

September is a weaker month for outdoor sightseeing in Ransiki.

What to pack for Ransiki in September

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

In September, Ransiki sees daytime highs around 29°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Ransiki 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 26 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 Ransiki 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 Ransiki peaks around March 14 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 17Jul 10UV 12
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar17Extreme
Apr16Extreme
May13Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep14Extreme
Oct15Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Ransiki?

Ransiki sits at 1.5°S, 134.2°E, 26 m above sea level, in Indonesia. The nearest listed city is Manokwari, 73 km away.

SorongWaisai

Topography around Ransiki

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

Within 3 km, the terrain around Ransiki has only modest variations in elevation — a maximum elevation change of 223 m around an average of 44 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,702 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,912 m.

The land around Ransiki is covered by trees (88%) within 3 km, trees (55%) and water (43%) within 16 km, and water (50%) and trees (48%) within 80 km.

3 km
223 m
16 km
1,702 m
80 km
2,912 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Manokwari 73 km · Bintuni 98 km · Biak 216 km · Teminabuan 240 km · Nabire 253 km · Fakfak 261 km · Sorong 331 km · Waisai 431 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 Ransiki (-1.5083°, 134.1708°, elevation 26 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).