Wonosobo weather in September

In September, Wonosobo sees average daytime highs of 26°C and overnight lows near 19°C, with 89 mm of rain across 12.7 wet days and about 12 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°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 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 Wonosobo's 4th-clearest and 3rd-windiest month. For the whole year in context, see Wonosobo's year-round climate.

Daytime high
26°
4th warmest
Overnight low
19°
3rd coldest
Rainfall
89 mm
12.7 wet days
Daylight
12 hours
5:36 AM – 5:34 PM
Cloud cover
69%
4th clearest
Wind
3 km/h
3rd windiest
Solar energy
5.75 kWh/m²
Travel score
6.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Wonosobo reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 27°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)
12618
22618
32618
42618
52618
62618
72619
82619
92619
102619
112619
122619
132619
142619
152619
162619
172619
182619
192619
202619
212619
222619
232619
242619
252619
262619
272619
282619
292619
302619

Wonosobo weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 20°56030.212.43.4
Feb26° / 20°54627.912.23.3
Mar26° / 20°52430.1123.4
Apr26° / 20°37927.711.83.6
May26° / 20°19122.111.74.7
Jun26° / 19°11815.711.65.6
Jul25° / 18°7512.211.66.3
Aug26° / 18°569.511.86.7
Sep26° / 19°8912.7126.0
Oct26° / 19°23920.712.24.8
Nov26° / 20°43727.612.33.7
Dec26° / 20°54729.112.43.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23763
33763
43763
53763
63763
73763
83862
93862
103763
113763
123763
133763
143763
153763
163763
173664
183664
193664
203565
213466
223367
233367
243367
253268
263169
273169
283070
292971
302773

Chance of precipitation in September

Any precipitation

Wonosobo gets around 89 mm of rain over 12.7 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 43% and peaks near 54% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
139
239
339
438
538
638
737
837
937
1036
1137
1237
1337
1438
1539
1640
1741
1842
1943
2044
2146
2247
2348
2449
2550
2651
2752
2852
2953
3054

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
10115633
20115633
31125433
41125433
51125433
61125433
71125532
81125532
91125631
101125631
111125631
121125730
131115731
141115731
151105831
161105831
17195832
18195733
19185734
20185635
21075736
22075637
23065638
24065539
25065341
26065242
27065143
28055144
29054946
30054847

Wind in September

Winds average 3 km/h in September.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:44 AM to 5:28 AM, and sunset from 5:36 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:445:36
211.95:445:36
311.95:435:36
411.95:435:35
511.95:425:35
611.95:425:35
711.95:415:35
811.95:415:35
911.95:405:35
1011.95:395:34
1111.95:395:34
1211.95:385:34
1311.95:385:34
1411.95:375:34
1512.05:365:34
1612.05:365:34
1712.05:355:33
1812.05:355:33
1912.05:345:33
2012.05:345:33
2112.05:335:33
2212.05:325:33
2312.05:325:32
2412.05:315:32
2512.05:315:32
2612.05:305:32
2712.05:305:32
2812.05:295:32
2912.15:295:32
3012.15:285:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.75 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 5.75 kWh/m² in September across the year — September's 5.75 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Wonosobo

In seasonPeak

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

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

Wonosobo's rainy season runs November–April, when most of the year's rain falls.

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

Is September a good time to visit Wonosobo?

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

6.0
Sightseeing
3rd-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Wonosobo for sightseeing.

What to pack for Wonosobo in September

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

In September, Wonosobo sees daytime highs around 26°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Wonosobo in September

The nearest coast averages about 29°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 54 km away) is warmest in May at about 30°C and coldest in February 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
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Wonosobo 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 Wonosobo peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 10 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highExtremeMar 15UV 15Jun 10UV 7
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar15Extreme
Apr11Extreme
May7Very high
Jun7Very high
Jul10Very high
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov8Very high
Dec13Extreme

Air quality in Wonosobo 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 Wonosobo is worst in April — around 58 µg/m³ PM2.5 (unhealthy), about 1.7× the cleanest month (September, 34 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorApr 2158 µg/m³Sep 1134 µg/m³
PM2.5 (µg/m³)Level
Jan48Poor
Feb46Poor
Mar54Poor
Apr58Unhealthy
May57Unhealthy
Jun51Poor
Jul42Poor
Aug35Moderate
Sep34Moderate
Oct37Poor
Nov42Poor
Dec42Poor
Location & terrain

Where is Wonosobo?

Wonosobo sits at 7.4°S, 109.9°E, 794 m above sea level, in Indonesia. The nearest listed city is Magelang, 37 km away.

Topography around Wonosobo

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

Within 3 km, the terrain around Wonosobo has significant variations in elevation — a maximum elevation change of 314 m around an average of 754 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,820 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Wonosobo is covered by trees (67%) and artificial surfaces (24%) within 3 km, trees (83%) within 16 km, and trees (57%) and water (23%) within 80 km.

3 km
314 m
16 km
2,820 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Magelang 37 km · Kutoarjo 40 km · Mertoyudan 40 km · Weleri 47 km · Muntilan 50 km · Gombong 51 km · Kedungwuni 52 km · Buaran 52 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 Wonosobo (-7.3589°, 109.9031°, elevation 794 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).