Padangsidempuan weather in September

In September, Padangsidempuan sees average daytime highs of 28°C and overnight lows near 19°C, with 236 mm of rain across 24.2 wet days and about 12 hours of daylight. It is the 8th-warmest and 7th-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 1% of the time in September, and the air most often feels muggy.

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 Padangsidempuan's 8th-clearest and 7th-windiest month. For the whole year in context, see Padangsidempuan's year-round climate.

Daytime high
28°
8th warmest
Overnight low
19°
4th coldest
Rainfall
236 mm
24.2 wet days
Daylight
12 hours
6:17 AM – 6:17 PM
Cloud cover
89%
8th clearest
Wind
5 km/h
7th windiest
Solar energy
4.75 kWh/m²
Travel score
3.9
out of 10

Padangsidempuan is city in North Sumatra Province, Indonesia.

Density
2,127/km²
people per km²
Founded
2001

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 Padangsidempuan reaches about 28°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12819
22819
32819
42819
52819
62819
72819
82819
92819
102819
112819
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222719
232719
242719
252719
262719
272719
282719
292719
302719

Padangsidempuan weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°24124.611.94.0
Feb28° / 20°21221.6123.7
Mar29° / 20°24726.6123.4
Apr29° / 20°29126.8123.2
May29° / 20°19822.412.13.8
Jun28° / 20°12617.412.14.5
Jul28° / 19°16719.712.14.7
Aug28° / 19°22623.5124.2
Sep28° / 19°23624.2123.9
Oct27° / 20°31026.2123.8
Nov27° / 20°3672811.93.4
Dec27° / 20°33527.511.93.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 3% of September, with mostly cloudy or overcast conditions the remaining 96%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1595
2595
3595
4694
5694
6694
7694
8595
9595
10595
11595
12595
13595
14595
15595
16595
17595
18496
19496
20397
21397
22397
23397
24298
25298
26298
27298
28397
29397
30397

Chance of precipitation in September

Any precipitation

Padangsidempuan gets around 236 mm of rain over 24.2 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 81% and peaks near 85% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
181
280
380
479
579
678
778
877
977
1077
1177
1277
1377
1477
1578
1679
1779
1880
1981
2082
2183
2283
2384
2485
2585
2685
2785
2885
2985
3085

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
118613
208812
308812
408812
508911
608911
708911
808911
908911
1009010
1109010
1209010
1309010
1409010
1509010
1609010
1709010
1809010
1909010
2008911
2108911
2208911
2308911
2408812
2508812
2608812
2708812
2808713
2908713
3008713

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 6:22 AM to 6:13 AM, and sunset from 6:23 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:226:23
212.06:226:23
312.06:216:23
412.06:216:22
512.06:216:22
612.06:206:22
712.06:206:21
812.06:206:21
912.06:196:20
1012.06:196:20
1112.06:196:20
1212.06:186:19
1312.06:186:19
1412.06:186:18
1512.06:176:18
1612.06:176:17
1712.06:176:17
1812.06:166:17
1912.06:166:16
2012.06:166:16
2112.06:156:15
2212.06:156:15
2312.06:156:15
2412.06:146:14
2512.06:146:14
2612.06:146:13
2712.06:136:13
2812.06:136:13
2912.06:136:12
3012.06:136:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.75 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 5.05 kWh/m² in February across the year — September's 4.75 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Padangsidempuan?

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

3.9
Sightseeing
5th-best month of the year
4.2
Beach & pool
7th-best month of the year

September is a weaker month for outdoor sightseeing in Padangsidempuan.

What to pack for Padangsidempuan in September

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

In September, Padangsidempuan sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

Sea temperature near Padangsidempuan in September

The nearest coast averages about 30°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 March at about 30°C and coldest in November 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
Feb30Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Padangsidempuan 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 Padangsidempuan peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 11 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 19UV 15Aug 11UV 11
UV index (midday)Level
Jan12Extreme
Feb15Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep14Extreme
Oct14Extreme
Nov12Extreme
Dec12Extreme

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

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateOct 1220 µg/m³Dec 1112 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar17Moderate
Apr15Moderate
May15Moderate
Jun14Moderate
Jul15Moderate
Aug14Moderate
Sep19Moderate
Oct20Moderate
Nov12Moderate
Dec12Moderate
Location & terrain

Where is Padangsidempuan?

Padangsidempuan sits at 1.4°N, 99.3°E, 310 m above sea level, in Indonesia. The nearest listed city is Sibolga, 68 km away.

Topography around Padangsidempuan

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

Within 3 km, the terrain around Padangsidempuan has significant variations in elevation — a maximum elevation change of 258 m around an average of 346 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,838 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,161 m.

The land around Padangsidempuan is covered by trees (63%) and artificial surfaces (28%) within 3 km, trees (90%) within 16 km, and trees (81%) within 80 km.

3 km
258 m
16 km
1,838 m
80 km
2,161 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sibolga 68 km · Tarutung 78 km · Bandar 92 km · Rantauprapat 102 km · Barus 120 km · Pangururan 151 km · Pematangsiantar 177 km · Kisaran 183 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 Padangsidempuan (1.3795°, 99.2715°, elevation 310 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).