Sumenep weather in September

In September, Sumenep sees average daytime highs of 30°C and overnight lows near 26°C, with 11 mm of rain across 1.5 wet days and about 12 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Sumenep's 2nd-clearest and 6th-windiest month. For the whole year in context, see Sumenep's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
26°
7th coldest
Rainfall
11 mm
1.5 wet days
Daylight
12 hours
5:20 AM – 5:18 PM
Cloud cover
41%
2nd clearest
Wind
13 km/h
6th windiest
Solar energy
7.01 kWh/m²
Travel score
6.1
out of 10

Sumenep is district in Sumenep Regency, East Java 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 30°C through the month.

A typical September day in Sumenep reaches about 30°C in the afternoon and slips back to 26°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253126
263126
273126
283126
293126
303126

How September really feels in Sumenep

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.

Sumenep weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 26°29329.312.43.0
Feb29° / 26°25026.612.23.0
Mar29° / 26°22627.2123.2
Apr30° / 26°1752211.93.7
May30° / 27°8212.311.74.9
Jun29° / 26°527.711.65.7
Jul29° / 26°223.711.66.5
Aug29° / 26°20.611.86.8
Sep30° / 26°111.5126.1
Oct31° / 26°386.412.25.0
Nov30° / 26°12517.612.33.8
Dec29° / 26°27628.112.43.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% 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 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27327
37327
47327
57327
67228
77129
87129
97129
107030
117030
127030
137030
147030
156931
166931
176931
186931
196931
207030
216931
226931
236931
246931
256931
266931
276832
286931
296832
306733

Chance of precipitation in September

Any precipitation

Sumenep gets around 11 mm of rain over 1.5 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 5% and peaks near 10% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
73
83
93
104
114
124
134
144
155
165
175
186
196
206
217
227
237
248
258
268
279
289
299
3010

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1340561
2339571
3339571
4338581
5338581
6338581
7337591
8337582
9337582
10337582
11337582
12336592
13336583
14236593
15236593
16236593
17235603
18135604
19134614
20134614
21133624
22132634
23131635
24130645
25129655
26128665
27127675
28126685
29125695
30124705

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over September. Sunrise moves from 5:28 AM to 5:12 AM, and sunset from 5:20 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:285:20
211.95:285:20
311.95:275:20
411.95:275:20
511.95:265:20
611.95:265:19
711.95:255:19
811.95:255:19
911.95:245:19
1011.95:235:19
1111.95:235:19
1211.95:225:18
1311.95:225:18
1411.95:215:18
1512.05:215:18
1612.05:205:18
1712.05:195:18
1812.05:195:17
1912.05:185:17
2012.05:185:17
2112.05:175:17
2212.05:175:17
2312.05:165:17
2412.05:155:16
2512.05:155:16
2612.05:145:16
2712.05:145:16
2812.05:135:16
2912.05:135:16
3012.15:125:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 7.01 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 5.23 kWh/m² to a high of 7.01 kWh/m² in September across the year — September's 7.01 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.9Intense
76.9Intense
86.9Intense
96.9Intense
106.9Intense
117.0Intense
127.0Intense
137.0Intense
147.0Intense
157.0Intense
167.0Intense
177.0Intense
187.0Intense
197.1Intense
207.1Intense
217.1Intense
227.1Intense
237.1Intense
247.1Intense
257.1Intense
267.1Intense
277.1Intense
287.1Intense
297.1Intense
307.1Intense
Planning a trip in September

Hazard calendar for Sumenep

In seasonPeak

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

Sumenep sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Sumenep's monsoon runs December–April, when most of the year's rain falls.

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

Is September a good time to visit Sumenep?

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

6.1
Sightseeing
3rd-best month of the year
8.4
Beach & pool
2nd-best month of the year

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

What to pack for Sumenep in September

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

In September, Sumenep sees daytime highs around 30°C and nights near 26°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Sumenep in September

The nearest coast averages about 28°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 13 km away) is warmest in November 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
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Sumenep 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 Sumenep peaks around March 10 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 14Jun 17UV 9
UV index (midday)Level
Jan10Extreme
Feb14Extreme
Mar14Extreme
Apr13Extreme
May10Extreme
Jun8Very high
Jul10Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec13Extreme

Air quality in Sumenep 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 Sumenep is worst in October — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (February, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateModerateOct 1823 µg/m³Feb 1812 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb12Good
Mar13Moderate
Apr12Good
May13Moderate
Jun13Moderate
Jul12Moderate
Aug13Moderate
Sep17Moderate
Oct24Moderate
Nov19Moderate
Dec16Moderate
Location & terrain

Where is Sumenep?

Sumenep sits at 7.0°S, 113.9°E, 8 m above sea level, in Indonesia. The nearest listed city is Kalianget, 10 km away.

Topography around Sumenep

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

Within 3 km, the terrain around Sumenep has only modest variations in elevation — a maximum elevation change of 115 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 334 m; within 80 km, large variations in elevation — a maximum elevation change of 1,128 m.

The land around Sumenep is covered by cropland (31%), trees (27%) and artificial surfaces (25%) within 3 km, trees (44%) and water (22%) within 16 km, and water (80%) within 80 km.

3 km
115 m
16 km
334 m
80 km
1,128 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Kalianget 10 km · Pamekasan 46 km · Sampang 71 km · Panarukan 77 km · Situbondo 79 km · Balung 81 km · Besuki 82 km · Panji 84 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 Sumenep (-7.0115°, 113.8604°, elevation 8 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).