Subulussalam weather in October

In October, Subulussalam sees average daytime highs of 29°C and overnight lows near 21°C, with 419 mm of rain across 26 wet days and about 11.9 hours of daylight. It is the 11th-warmest and 2nd-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 0% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of October to 11 h 54 min by month's end. Set against the rest of the year, October is Subulussalam's 11th-clearest and 5th-windiest month. For the whole year in context, see Subulussalam's year-round climate.

Daytime high
29°
11th warmest
Overnight low
21°
8th coldest
Rainfall
419 mm
26 wet days
Daylight
11 h 54 min
6:15 AM – 6:12 PM
Cloud cover
93%
11th clearest
Wind
4 km/h
5th windiest
Solar energy
4.32 kWh/m²
Travel score
3.4
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical October day in Subulussalam reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, October runs on par with September and on par with November.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262821
272821
282821
292821
302821
312821

How October really feels in Subulussalam

Once humidity and wind are folded in, October averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Subulussalam weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°32726.311.93.1
Feb30° / 20°28923.911.92.9
Mar30° / 21°33928.2122.8
Apr30° / 21°36827.312.12.8
May30° / 21°26421.412.13.4
Jun30° / 21°15016.712.23.9
Jul30° / 20°16017.712.14.0
Aug29° / 20°23820.712.13.8
Sep29° / 21°29522.5123.6
Oct29° / 21°4192611.93.4
Nov28° / 21°51028.211.93.1
Dec29° / 21°39527.511.83.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 2% of October, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1298
2397
3397
4397
5397
6397
7496
8595
9595
10595
11496
12496
13496
14496
15496
16298
17298
18298
19298
20298
21199
22199
23199
24199
25199
26199
27199
28199
29298
30298
31298

Chance of precipitation in October

Any precipitation

Subulussalam gets around 419 mm of rain over 26 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 84% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
179
279
379
479
580
680
780
880
980
1081
1181
1281
1382
1482
1583
1683
1784
1884
1985
2086
2186
2286
2387
2487
2588
2688
2788
2889
2989
3089
3190

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
12278
22278
32377
42377
52278
62278
72278
82278
92278
102278
112179
122179
132080
142080
151981
161882
171783
181684
191684
201585
211585
221486
231387
241387
251288
261288
271189
281189
291189
301090
311090

Wind in October

Winds average 4 km/h in October.

Across October, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
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
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 hours at the start of October to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over October. Sunrise moves from 6:18 AM to 6:15 AM, and sunset from 6:17 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:186:17
212.06:186:16
312.06:186:16
412.06:176:16
512.06:176:15
612.06:176:15
712.06:176:15
812.06:176:14
912.06:166:14
1012.06:166:13
1112.06:166:13
1212.06:166:13
1311.96:166:13
1411.96:166:12
1511.96:156:12
1611.96:156:12
1711.96:156:11
1811.96:156:11
1911.96:156:11
2011.96:156:11
2111.96:156:11
2211.96:156:10
2311.96:156:10
2411.96:156:10
2511.96:156:10
2611.96:156:10
2711.96:156:10
2811.96:156:09
2911.96:156:09
3011.96:156:09
3111.96:156:09

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.32 kWh/m².

For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 5.26 kWh/m² in February across the year — October's 4.32 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
314.0Moderate
Planning a trip in October

Hazard calendar for Subulussalam

In seasonPeak

In October, Subulussalam sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

Subulussalam sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is October a good time to visit Subulussalam?

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

3.4
Sightseeing
5th-best month of the year
4.2
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Subulussalam.

What to pack for Subulussalam in October

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

In October, Subulussalam sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. About 26 days see rain.

light clothesrain gear

Sea temperature near Subulussalam in October

The nearest coast averages about 29°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 km away) is warmest in May 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 Subulussalam in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Subulussalam peaks around March 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 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 14Jul 13UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep14Extreme
Oct13Extreme
Nov11Extreme
Dec12Extreme

Air quality in Subulussalam in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Subulussalam is worst in March — around 25 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1425 µg/m³Dec 1218 µg/m³
PM2.5 (µg/m³)Level
Jan21Moderate
Feb24Moderate
Mar25Moderate
Apr23Moderate
May21Moderate
Jun21Moderate
Jul20Moderate
Aug20Moderate
Sep24Moderate
Oct23Moderate
Nov19Moderate
Dec18Moderate
Location & terrain

Where is Subulussalam?

Subulussalam sits at 2.7°N, 97.9°E, 29 m above sea level, in Indonesia. The nearest listed city is Singkil, 43 km away.

Topography around Subulussalam

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

Within 3 km, the terrain around Subulussalam has only modest variations in elevation — a maximum elevation change of 40 m around an average of 21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 205 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,429 m.

The land around Subulussalam is covered by trees (90%) within 3 km, trees (92%) within 16 km, and trees (63%) and water (33%) within 80 km.

3 km
40 m
16 km
205 m
80 km
2,429 m
treesshrubsgrasslandcroplandartificial surfaceswater
October weather nearby: Singkil 43 km · Sidikalang 49 km · Paropo 74 km · Tongging 76 km · Kabanjahe 83 km · Pangururan 91 km · Berastagi 91 km · Barus 92 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 Subulussalam (2.662°, 97.8827°, elevation 29 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).