Kutoarjo weather in September

In September, Kutoarjo sees average daytime highs of 29°C and overnight lows near 22°C, with 64 mm of rain across 11.8 wet days and about 12 hours of daylight. It is the 10th-warmest and 10th-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 12% 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 Kutoarjo's 5th-clearest and 2nd-windiest month. For the whole year in context, see Kutoarjo's year-round climate.

Daytime high
29°
10th warmest
Overnight low
22°
3rd coldest
Rainfall
64 mm
11.8 wet days
Daylight
12 hours
5:36 AM – 5:33 PM
Cloud cover
67%
5th clearest
Wind
9 km/h
2nd windiest
Solar energy
5.93 kWh/m²
Travel score
5.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Kutoarjo reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52822
62822
72822
82822
92822
102822
112822
122922
132922
142922
152922
162922
172922
182922
192922
202922
212922
222922
232922
242922
252922
262922
272922
282922
292922
302923

How September really feels in Kutoarjo

Once humidity and wind are folded in, September 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

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

Kutoarjo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°34328.712.42.8
Feb30° / 24°29626.812.32.6
Mar30° / 24°28728.412.12.7
Apr30° / 24°23326.311.82.9
May30° / 24°12519.711.73.9
Jun29° / 23°9115.211.64.7
Jul28° / 22°4910.211.65.9
Aug28° / 21°388.411.76.3
Sep29° / 22°6411.8125.3
Oct29° / 23°16319.412.24.1
Nov30° / 24°29827.112.42.9
Dec30° / 24°35828.712.42.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34258
44258
54258
64258
74258
84159
94159
104159
114159
124159
133961
143961
153862
163862
173763
183664
193664
203565
213565
223466
233367
243268
253268
263268
273169
283070
293169
303070

Chance of precipitation in September

Any precipitation

Kutoarjo gets around 64 mm of rain over 11.8 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 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
131
232
332
433
533
634
734
834
935
1035
1136
1236
1336
1437
1538
1639
1740
1840
1941
2042
2143
2244
2345
2445
2546
2647
2748
2849
2949
3050

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 68% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1234613
2233632
3233632
4232642
5232642
6231652
7231652
8231652
9230662
10230662
11229672
12129673
13128683
14128683
15127693
16127684
17126694
18126694
19125704
20025705
21024715
22024715
23023725
24023716
25022726
26022726
27021736
28021736
29020746
30019747

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:45 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)
111.95:455:36
211.95:445:35
311.95:435:35
411.95:435:35
511.95:425:35
611.95:425:35
711.95:415:35
811.95:415:35
911.95:405:34
1011.95:395:34
1111.95:395:34
1211.95:385:34
1311.95:385:34
1411.95:375:34
1512.05:375:34
1612.05:365:33
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
2912.15:285:32
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 5.93 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 5.93 kWh/m² in September across the year — September's 5.93 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Kutoarjo

In seasonPeak

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

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

Kutoarjo's rainy season runs October–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 Kutoarjo?

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

5.3
Sightseeing
3rd-best month of the year
6.4
Beach & pool
3rd-best month of the year

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

What to pack for Kutoarjo in September

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

In September, Kutoarjo sees daytime highs around 29°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Kutoarjo in September

The nearest coast averages about 25°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 18 km away) is warmest in April at about 29°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov28Warm
Dec29Tropical

UV index in Kutoarjo 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 Kutoarjo peaks around March 13 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 highExtremeExtremeMar 13UV 15Jun 10UV 7
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar16Extreme
Apr12Extreme
May7Very high
Jun7Very high
Jul10Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov9Very high
Dec12Extreme

Air quality in Kutoarjo 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 Kutoarjo 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 Kutoarjo?

Kutoarjo sits at 7.7°S, 109.9°E, 20 m above sea level, in Indonesia. The nearest listed city is Wonosobo, 40 km away.

Topography around Kutoarjo

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

Within 3 km, the terrain around Kutoarjo has only modest variations in elevation — a maximum elevation change of 92 m around an average of 18 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 660 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,290 m.

The land around Kutoarjo is covered by trees (48%) and cropland (38%) within 3 km, trees (58%) and cropland (35%) within 16 km, and trees (57%) and water (27%) within 80 km.

3 km
92 m
16 km
660 m
80 km
3,290 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Wonosobo 40 km · Mertoyudan 41 km · Godean 42 km · Magelang 43 km · Muntilan 45 km · Srandakan 45 km · Gombong 46 km · Gamping Lor 46 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 Kutoarjo (-7.7169°, 109.9128°, elevation 20 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).