Wonosari weather in September

In September, Wonosari sees average daytime highs of 30°C and overnight lows near 23°C, with 25 mm of rain across 4.5 wet days and about 12 hours of daylight. It is the 8th-warmest and 10th-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 25% of the time in September, and the air most often feels oppressive.

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 Wonosari's 4th-clearest and 2nd-windiest month. For the whole year in context, see Wonosari's year-round climate.

Daytime high
30°
8th warmest
Overnight low
23°
3rd coldest
Rainfall
25 mm
4.5 wet days
Daylight
12 hours
5:33 AM – 5:31 PM
Cloud cover
58%
4th clearest
Wind
13 km/h
2nd windiest
Solar energy
5.96 kWh/m²
Travel score
5.7
out of 10

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 Wonosari reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023

How September really feels in Wonosari

Once humidity and wind are folded in, September averages 26 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
26
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.

Wonosari weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°30228.612.42.8
Feb30° / 24°27125.812.32.7
Mar30° / 24°24127.812.12.8
Apr31° / 25°17322.911.83.2
May31° / 24°8313.611.64.3
Jun30° / 24°587.811.55.1
Jul29° / 23°204.411.66.0
Aug29° / 22°132.111.76.4
Sep30° / 23°254.5125.7
Oct30° / 24°8112.812.24.4
Nov30° / 24°20223.312.43.1
Dec30° / 24°31027.812.52.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45743
55743
65644
75644
85644
95644
105644
115644
125644
135545
145545
155446
165446
175347
185347
195248
205050
215050
224951
234951
244753
254654
264555
274456
284357
294357
304159

Chance of precipitation in September

Any precipitation

Wonosari gets around 25 mm of rain over 4.5 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 16% and peaks near 25% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
110
210
310
410
510
611
711
811
912
1012
1113
1213
1314
1414
1515
1615
1716
1816
1917
2018
2118
2219
2319
2420
2521
2622
2722
2823
2924
3025

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1350461
2349471
3348481
4347491
5347501
6246511
7245521
8244531
9244531
10243541
11242551
12141562
13140572
14140572
15139582
16139573
17138583
18037603
19037594
20036604
21035614
22034615
23033625
24032635
25031645
26031645
27030655
28029665
29027685
30026686

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 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

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 5:42 AM to 5:25 AM, and sunset from 5:33 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:425:33
211.95:415:33
311.95:415:32
411.95:405:32
511.95:405:32
611.95:395:32
711.95:395:32
811.95:385:32
911.95:375:32
1011.95:375:31
1111.95:365:31
1211.95:365:31
1311.95:355:31
1411.95:345:31
1511.95:345:31
1612.05:335:31
1712.05:335:30
1812.05:325:30
1912.05:315:30
2012.05:315:30
2112.05:305:30
2212.05:305:30
2312.05:295:30
2412.05:285:29
2512.05:285:29
2612.05:275:29
2712.05:275:29
2812.05:265:29
2912.15:265:29
3012.15:255:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.96 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 6.03 kWh/m² in October across the year — September's 5.96 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Bright
176.0Bright
186.0Bright
196.0Bright
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
Planning a trip in September

Hazard calendar for Wonosari

In seasonPeak

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

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

Wonosari'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 Wonosari?

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

5.7
Sightseeing
3rd-best month of the year
7.6
Beach & pool
3rd-best month of the year

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

What to pack for Wonosari in September

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

In September, Wonosari sees daytime highs around 30°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Wonosari 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 March 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
May28Tropical
Jun27Warm
Jul26Warm
Aug25Warm
Sep25Warm
Oct26Warm
Nov28Warm
Dec29Tropical

UV index in Wonosari 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 Wonosari peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeMar 13UV 15Jun 15UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May9Very high
Jun6High
Jul10Very high
Aug11Extreme
Sep13Extreme
Oct13Extreme
Nov10Very high
Dec12Extreme

Air quality in Wonosari 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 Wonosari is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1823 µg/m³Dec 1514 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar20Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul18Moderate
Aug18Moderate
Sep18Moderate
Oct19Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Wonosari?

Wonosari sits at 8.0°S, 110.6°E, 181 m above sea level, in Indonesia. The nearest listed city is Karangnongko, 19 km away.

Topography around Wonosari

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

Within 3 km, the terrain around Wonosari has only modest variations in elevation — a maximum elevation change of 51 m around an average of 184 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 745 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,224 m.

The land around Wonosari is covered by trees (61%) and artificial surfaces (25%) within 3 km, trees (81%) within 16 km, and trees (53%) and water (29%) within 80 km.

3 km
51 m
16 km
745 m
80 km
3,224 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Karangnongko 19 km · Wedi 25 km · Candi Prambanan 27 km · Pundong 28 km · Trucuk 28 km · Sewon 29 km · Klaten 29 km · Depok 29 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 Wonosari (-7.9656°, 110.6036°, elevation 181 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).