Bondowoso weather in September

In September, Bondowoso sees average daytime highs of 27°C and overnight lows near 17°C, with 60 mm of rain across 11.3 wet days and about 12 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 10% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Bondowoso's 1st-clearest and 1st-windiest month. For the whole year in context, see Bondowoso's year-round climate.

Daytime high
27°
5th warmest
Overnight low
17°
3rd coldest
Rainfall
60 mm
11.3 wet days
Daylight
12 hours
5:20 AM – 5:18 PM
Cloud cover
68%
1st clearest
Wind
6 km/h
1st windiest
Solar energy
5.92 kWh/m²
Travel score
6.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Bondowoso reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12717
22717
32717
42717
52717
62717
72717
82717
92717
102717
112717
122717
132717
142717
152717
162717
172717
182717
192717
202717
212717
222717
232717
242718
252718
262718
272718
282718
292718
302718

Bondowoso weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 20°41230.112.43.4
Feb27° / 20°40727.312.33.3
Mar27° / 20°37828.812.13.5
Apr27° / 19°26326.211.83.8
May27° / 19°11817.611.65.3
Jun26° / 18°6912.411.56.0
Jul26° / 17°4910.711.66.4
Aug26° / 16°349.211.76.6
Sep27° / 17°6011.3126.1
Oct27° / 18°15118.212.25.1
Nov27° / 19°28525.512.43.9
Dec27° / 20°36128.412.53.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23664
33664
43664
53664
63664
73664
83664
93763
103664
113664
123565
133565
143466
153466
163466
173367
183367
193367
203367
213367
223268
233367
243367
253268
263169
273169
283169
293070
303070

Chance of precipitation in September

Any precipitation

Bondowoso gets around 60 mm of rain over 11.3 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 39% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
134
234
334
434
535
635
735
834
935
1035
1135
1235
1335
1436
1536
1637
1737
1838
1939
2039
2140
2241
2342
2443
2544
2645
2746
2847
2947
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 33% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
1126226
2126226
3126127
4126127
5126127
6126127
7126028
8116128
9116128
10116128
11116128
12106129
13106030
14106030
1596031
1695932
1795932
1885933
1985834
2085735
2175736
2275637
2375538
2475439
2565440
2665341
2765242
2865143
2965044
3064945

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 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
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 5:29 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)
111.85:295:20
211.95:285:20
311.95:285:20
411.95:275:19
511.95:275:19
611.95:265:19
711.95:265:19
811.95:255:19
911.95:245:19
1011.95:245:19
1111.95:235:18
1211.95:235:18
1311.95:225:18
1411.95:225:18
1511.95:215:18
1612.05:205:18
1712.05:205:18
1812.05:195:17
1912.05:195:17
2012.05:185:17
2112.05:175:17
2212.05:175:17
2312.05:165:17
2412.05:165:17
2512.05:155:16
2612.05:145:16
2712.05:145:16
2812.05:135:16
2912.15:135:16
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 5.92 kWh/m².

For context, solar energy here swings from a low near 4.38 kWh/m² to a high of 5.97 kWh/m² in October across the year — September's 5.92 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
176.0Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Intense
296.0Intense
306.0Intense
Planning a trip in September

Hazard calendar for Bondowoso

In seasonPeak

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

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

Bondowoso's monsoon runs November–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 Bondowoso?

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
6.1
Beach & pool
2nd-best month of the year

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

What to pack for Bondowoso in September

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

In September, Bondowoso sees daytime highs around 27°C and nights near 17°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Bondowoso 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 33 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 Bondowoso 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 Bondowoso peaks around October 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 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 highExtremeOct 10UV 13Jun 18UV 9
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul10Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Bondowoso 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 Bondowoso is worst in July — around 46 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (September, 24 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateJul 1644 µg/m³Sep 1825 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb31Moderate
Mar37Poor
Apr35Poor
May31Moderate
Jun34Moderate
Jul46Poor
Aug34Moderate
Sep24Moderate
Oct29Moderate
Nov27Moderate
Dec29Moderate
Location & terrain

Where is Bondowoso?

Bondowoso sits at 7.9°S, 113.8°E, 258 m above sea level, in Indonesia. The nearest listed city is Balung, 23 km away.

Topography around Bondowoso

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

Within 3 km, the terrain around Bondowoso has only modest variations in elevation — a maximum elevation change of 85 m around an average of 269 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,431 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,219 m.

The land around Bondowoso is covered by cropland (36%), trees (35%) and artificial surfaces (26%) within 3 km, trees (69%) and cropland (24%) within 16 km, and trees (43%) and water (42%) within 80 km.

3 km
85 m
16 km
2,431 m
80 km
3,219 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Balung 23 km · Besuki 24 km · Panarukan 26 km · Situbondo 31 km · Jember 32 km · Panji 37 km · Kraksaan 50 km · Genteng 62 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 Bondowoso (-7.9135°, 113.8214°, elevation 258 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).