Rantepao weather in September

In September, Rantepao sees average daytime highs of 28°C and overnight lows near 19°C, with 75 mm of rain across 12.2 wet days and about 12 hours of daylight. It is the 7th-warmest and 12th-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 27% of the time in September, and the air most often feels muggy.

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

Daytime high
28°
7th warmest
Overnight low
19°
2nd coldest
Rainfall
75 mm
12.2 wet days
Daylight
12 hours
5:55 AM – 5:54 PM
Cloud cover
59%
1st clearest
Wind
4 km/h
1st windiest
Solar energy
5.96 kWh/m²
Travel score
6.0
out of 10

Rantepao is capital of North Toraja Regency, South Sulawesi Province, Indonesia.

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 28°C through the month.

A typical September day in Rantepao reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92719
102719
112719
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282819
292819
302819

Rantepao weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°49629.512.23.3
Feb28° / 20°48327.412.13.2
Mar28° / 20°49529.5123.3
Apr27° / 20°50327.811.93.5
May27° / 20°26224.511.94.2
Jun27° / 20°20321.211.84.7
Jul26° / 19°12918.211.85.3
Aug27° / 19°9415.311.95.8
Sep28° / 19°7512.2126.0
Oct28° / 19°13315.212.14.9
Nov28° / 20°22623.112.13.8
Dec28° / 20°49829.512.23.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25149
35149
45149
55149
65050
75050
85050
94951
104951
114852
124852
134852
144753
154753
164654
174654
184753
194753
204654
214753
224753
234753
244654
254555
264456
274357
284258
294258
304060

Chance of precipitation in September

Any precipitation

Rantepao gets around 75 mm of rain over 12.2 wet days in September, the driest month. 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 45% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
145
244
343
443
542
641
741
840
940
1040
1139
1239
1339
1439
1539
1639
1739
1839
1940
2040
2140
2240
2341
2441
2542
2643
2743
2844
2945
3045

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10325720
20426700
30427690
40527680
51528660
61628650
71629640
81730620
91730620
101730611
111731601
121731601
131731601
141731601
151730611
161730611
171630621
181629622
191529632
201528642
211428652
221427662
231426672
241426672
251425673
261424683
271423693
281422703
291421713
301520713

Wind in September

Winds average 4 km/h in September, the windiest month of the year.

Across September, 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.

0246810151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min 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 6 minutes over September. Sunrise moves from 6:02 AM to 5:49 AM, and sunset from 5:58 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:025:58
211.96:015:58
311.96:015:58
412.06:015:58
512.06:005:57
612.06:005:57
712.05:595:57
812.05:595:57
912.05:585:56
1012.05:585:56
1112.05:575:56
1212.05:575:55
1312.05:575:55
1412.05:565:55
1512.05:565:55
1612.05:555:54
1712.05:555:54
1812.05:545:54
1912.05:545:53
2012.05:535:53
2112.05:535:53
2212.05:525:53
2312.05:525:52
2412.05:525:52
2512.05:515:52
2612.05:515:51
2712.05:505:51
2812.05:505:51
2912.05:495:51
3012.05:495:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.96 kWh/m².

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 5.97 kWh/m² in October across the year — September's 5.96 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
156.0Bright
166.0Bright
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
Planning a trip in September

Hazard calendar for Rantepao

In seasonPeak

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

Rantepao's rainy season runs December–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 Rantepao?

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

6.0
Sightseeing
1st-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Rantepao in September

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

In September, Rantepao sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Rantepao 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 54 km away) is warmest in March at about 30°C and coldest in August near 28°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan30Tropical
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct30Tropical
Nov30Tropical
Dec30Tropical

UV index in Rantepao 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 Rantepao peaks around March 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 16Jun 21UV 11
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar16Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep14Extreme
Oct15Extreme
Nov14Extreme
Dec14Extreme

Air quality in Rantepao 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 Rantepao is worst in October — around 20 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 1620 µg/m³Jul 1212 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb12Moderate
Mar14Moderate
Apr13Moderate
May12Moderate
Jun12Good
Jul12Good
Aug13Moderate
Sep17Moderate
Oct20Moderate
Nov17Moderate
Dec14Moderate
Location & terrain

Where is Rantepao?

Rantepao sits at 3.0°S, 119.9°E, 784 m above sea level, in Indonesia. The nearest listed city is Palopo, 33 km away.

Topography around Rantepao

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

Within 3 km, the terrain around Rantepao has significant variations in elevation — a maximum elevation change of 322 m around an average of 816 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,593 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,407 m.

The land around Rantepao is covered by trees (56%) and cropland (24%) within 3 km, trees (80%) within 16 km, and trees (78%) within 80 km.

3 km
322 m
16 km
1,593 m
80 km
3,407 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Palopo 33 km · Masamba 67 km · Polewali 80 km · Parepare 120 km · Majene 121 km · Sengkang 130 km · Watampone 181 km · Poso 199 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 Rantepao (-2.9701°, 119.8978°, elevation 784 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. 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).