Amuntai weather in September

In September, Amuntai sees average daytime highs of 33°C and overnight lows near 23°C, with 99 mm of rain across 14.2 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 14% 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 Amuntai's 3rd-clearest and 1st-windiest month. For the whole year in context, see Amuntai's year-round climate.

Daytime high
33°
1st warmest
Overnight low
23°
3rd coldest
Rainfall
99 mm
14.2 wet days
Daylight
12 hours
6:14 AM – 6:13 PM
Cloud cover
71%
3rd clearest
Wind
4 km/h
1st windiest
Solar energy
5.53 kWh/m²
Travel score
3.0
out of 10

Amuntai is city in 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 33°C through the month.

A typical September day in Amuntai reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143323
153323
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Amuntai

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.

Amuntai weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°23728.512.12.5
Feb31° / 24°20724.612.12.5
Mar31° / 24°26128.2122.4
Apr31° / 24°2532811.92.4
May32° / 24°1992511.92.7
Jun31° / 24°15719.911.93.2
Jul31° / 23°12717.411.93.5
Aug32° / 23°8613.611.93.4
Sep33° / 23°9914.2123.0
Oct33° / 24°16720.212.12.7
Nov32° / 24°27128.112.12.3
Dec31° / 24°27729.412.12.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43565
53565
63565
73664
83664
93664
103466
113466
123565
133565
143565
153565
163565
173565
183565
193565
203565
213466
223466
233367
243367
253268
263169
273070
282872
292872
302674

Chance of precipitation in September

Any precipitation

Amuntai gets around 99 mm of rain over 14.2 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 49% and peaks near 50% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
149
249
349
449
549
649
749
849
949
1049
1149
1249
1349
1450
1549
1649
1749
1849
1949
2048
2148
2247
2347
2447
2547
2647
2748
2849
2949
3050

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10235126
21235026
31235026
41235026
51235026
61234926
71234926
82235026
92235026
102225125
112225125
122225125
132215225
142215225
152205325
162205325
172205226
182195326
192195326
202195326
212185426
221185526
231175626
241175626
251175527
261175428
271175428
280175429
290175330
300165331

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 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 6:20 AM to 6:08 AM, and sunset from 6:17 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:206:17
212.06:206:17
312.06:196:17
412.06:196:16
512.06:186:16
612.06:186:16
712.06:186:16
812.06:176:15
912.06:176:15
1012.06:166:15
1112.06:166:14
1212.06:156:14
1312.06:156:14
1412.06:156:14
1512.06:146:13
1612.06:146:13
1712.06:136:13
1812.06:136:12
1912.06:126:12
2012.06:126:12
2112.06:126:11
2212.06:116:11
2312.06:116:11
2412.06:106:11
2512.06:106:10
2612.06:096:10
2712.06:096:10
2812.06:096:09
2912.06:086:09
3012.06:086:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.53 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 5.53 kWh/m² in September across the year — September's 5.53 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Amuntai?

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

3.0
Sightseeing
4th-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Amuntai.

What to pack for Amuntai in September

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

In September, Amuntai sees daytime highs around 33°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Amuntai in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Amuntai peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 15Jul 12UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Amuntai 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 Amuntai is worst in September — around 93 µg/m³ PM2.5 (unhealthy), about 5.3× the cleanest month (January, 18 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyModerateSep 2292 µg/m³Jan 1518 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb18Moderate
Mar22Moderate
Apr21Moderate
May23Moderate
Jun23Moderate
Jul30Moderate
Aug49Poor
Sep93Unhealthy
Oct87Unhealthy
Nov28Moderate
Dec18Moderate
Location & terrain

Where is Amuntai?

Amuntai sits at 2.4°S, 115.2°E, 10 m above sea level, in Indonesia. The nearest listed city is Barabai, 24 km away.

Topography around Amuntai

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

Within 3 km, the terrain around Amuntai has only modest variations in elevation — a maximum elevation change of 18 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 35 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,962 m.

The land around Amuntai is covered by trees (37%) within 3 km, trees (45%) and grassland (21%) within 16 km, and trees (78%) within 80 km.

3 km
18 m
16 km
35 m
80 km
1,962 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Barabai 24 km · Tanjung 33 km · Kualakapuas 116 km · Martapura 118 km · Banjarbaru 123 km · Banjarmasin 124 km · Palangkaraya 150 km · Muara Teweh 168 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 Amuntai (-2.4177°, 115.2494°, elevation 10 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. 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).