Mranggen weather in September

In September, Mranggen sees average daytime highs of 33°C and overnight lows near 24°C, with 44 mm of rain across 6.1 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels muggy.

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

Daytime high
33°
1st warmest
Overnight low
24°
8th coldest
Rainfall
44 mm
6.1 wet days
Daylight
12 hours
5:33 AM – 5:31 PM
Cloud cover
57%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
6.31 kWh/m²
Travel score
3.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in Mranggen reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°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)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324

How September really feels in Mranggen

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.

Mranggen weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°39129.912.42.7
Feb30° / 24°35427.212.22.7
Mar30° / 24°34529.3122.6
Apr31° / 24°2372611.82.7
May32° / 24°10216.411.73.5
Jun32° / 24°6010.511.64.0
Jul32° / 23°386.511.64.3
Aug33° / 23°23411.84.2
Sep33° / 24°446.1123.7
Oct33° / 24°13915.312.23.0
Nov32° / 24°28225.612.32.5
Dec30° / 24°41629.212.42.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
65941
75941
85941
95743
105743
115644
125644
135644
145446
155446
165347
175347
185347
195248
205248
215149
225149
235050
244951
254852
264852
274852
284753
294654
304555

Chance of precipitation in September

Any precipitation

Mranggen gets around 44 mm of rain over 6.1 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 20% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
217
317
416
516
616
716
815
915
1015
1115
1216
1316
1416
1517
1618
1719
1820
1921
2022
2123
2224
2325
2426
2527
2628
2729
2830
2931
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111258290
211258290
311357290
411357290
511357290
611358280
711358280
811359270
911359270
1011358271
1111359261
1211359261
1311260261
1411259262
1511259262
1611159272
1711159272
1811059282
1911057293
201957303
211956313
221856323
231855333
240855343
250755353
260754363
270753373
280752383
290651394
300649414

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 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
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:42 AM to 5:26 AM, and sunset from 5:34 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:425:34
211.95:415:33
311.95:415:33
411.95:405:33
511.95:405:33
611.95:395:33
711.95:385:33
811.95:385:32
911.95:375:32
1011.95:375:32
1111.95:365:32
1211.95:365:32
1311.95:355:32
1411.95:355:31
1512.05:345:31
1612.05:335:31
1712.05:335:31
1812.05:325:31
1912.05:325:31
2012.05:315:30
2112.05:315:30
2212.05:305:30
2312.05:295:30
2412.05:295:30
2512.05:285:30
2612.05:285:29
2712.05:275:29
2812.05:275:29
2912.05:265:29
3012.15:265:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.31 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 6.31 kWh/m² in September across the year — September's 6.31 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Mranggen

In seasonPeak

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

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

Mranggen'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 Mranggen?

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

3.7
Sightseeing
4th-best month of the year
6.7
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Mranggen. The water and warmth also suit a beach or pool day.

What to pack for Mranggen in September

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

In September, Mranggen sees daytime highs around 33°C and nights near 24°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Mranggen 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 23 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
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Mranggen in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mranggen peaks around March 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 14 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 highExtremeVery highExtremeMar 16UV 14Jun 14UV 7
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7High
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov8Very high
Dec12Extreme

Air quality in Mranggen 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 Mranggen is worst in May — around 45 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorMay 1445 µg/m³Feb 1131 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb30Moderate
Mar38Poor
Apr43Poor
May45Poor
Jun41Poor
Jul36Poor
Aug36Poor
Sep38Poor
Oct39Poor
Nov38Poor
Dec34Moderate
Location & terrain

Where is Mranggen?

Mranggen sits at 7.0°S, 110.5°E, 20 m above sea level, in Indonesia. The nearest listed city is Semarang, 11 km away.

Topography around Mranggen

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

Within 3 km, the terrain around Mranggen has only modest variations in elevation — a maximum elevation change of 38 m around an average of 17 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 403 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,293 m.

The land around Mranggen is covered by artificial surfaces (37%), cropland (33%) and trees (24%) within 3 km, trees (30%), cropland (28%) and artificial surfaces (24%) within 16 km, and trees (47%), water (23%) and cropland (21%) within 80 km.

3 km
38 m
16 km
403 m
80 km
3,293 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Semarang 11 km · Ungaran 18 km · Demak 20 km · Ambarawa 29 km · Welahan 34 km · Salatiga 34 km · Pecangaan 42 km · Kudus 44 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 Mranggen (-7.0268°, 110.5158°, 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).