Blora weather in September

In September, Blora sees average daytime highs of 33°C and overnight lows near 23°C, with 30 mm of rain across 5.1 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-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 34% 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 Blora's 2nd-clearest and 5th-windiest month. For the whole year in context, see Blora's year-round climate.

Daytime high
33°
1st warmest
Overnight low
23°
3rd coldest
Rainfall
30 mm
5.1 wet days
Daylight
12 hours
5:30 AM – 5:28 PM
Cloud cover
55%
2nd clearest
Wind
7 km/h
5th windiest
Solar energy
6.68 kWh/m²
Travel score
3.6
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 Blora reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°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)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143323
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253424
263424
273424
283424
293424
303424

How September really feels in Blora

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.

Blora weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°32829.312.42.4
Feb31° / 24°3162712.22.4
Mar31° / 24°30428.8122.4
Apr32° / 24°22725.311.92.6
May32° / 24°11117.111.73.5
Jun32° / 24°6210.311.64.0
Jul32° / 23°335.411.64.3
Aug33° / 23°143.411.84.2
Sep33° / 23°305.1123.6
Oct33° / 24°11413.812.22.9
Nov33° / 24°25123.712.32.4
Dec32° / 24°32728.312.42.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26139
36238
46238
56238
66238
76238
86238
96238
106139
116040
126040
136040
145941
155842
165842
175743
185743
195545
205545
215446
225248
235248
245149
255050
264951
274951
284852
294753
304753

Chance of precipitation in September

Any precipitation

Blora gets around 30 mm of rain over 5.1 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 18% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
114
213
313
413
513
613
713
813
913
1014
1114
1214
1315
1415
1515
1616
1717
1817
1918
2019
2120
2221
2321
2422
2523
2624
2725
2827
2928
3029

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1960301
2960301
3960301
4960301
51059301
61059301
71059301
81059301
91060291
101060291
111060291
12961291
13960301
14959302
15860302
16860302
17760303
18759313
19659314
20659314
21558325
22558325
23457336
24456346
25456346
26355357
27354367
28353377
29352387
30350407

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:38 AM to 5:22 AM, and sunset from 5:30 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:385:30
211.95:385:30
311.95:375:30
411.95:365:30
511.95:365:29
611.95:355:29
711.95:355:29
811.95:345:29
911.95:345:29
1011.95:335:29
1111.95:335:28
1211.95:325:28
1311.95:315:28
1411.95:315:28
1512.05:305:28
1612.05:305:28
1712.05:295:27
1812.05:295:27
1912.05:285:27
2012.05:285:27
2112.05:275:27
2212.05:265:26
2312.05:265:26
2412.05:255:26
2512.05:255:26
2612.05:245:26
2712.05:245:26
2812.05:235:26
2912.05:235:25
3012.15:225:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.68 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.98 kWh/m² to a high of 6.68 kWh/m² in September across the year — September's 6.68 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
Planning a trip in September

Hazard calendar for Blora

In seasonPeak

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

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

Blora'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 Blora?

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

3.6
Sightseeing
4th-best month of the year
6.8
Beach & pool
3rd-best month of the year

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

What to pack for Blora in September

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

In September, Blora sees daytime highs around 33°C and nights near 23°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Blora 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 39 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
Jul29Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Blora 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 Blora peaks around March 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highMar 17UV 14Jun 16UV 8
UV index (midday)Level
Jan10Extreme
Feb10Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov7Very high
Dec11Extreme

Air quality in Blora 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 Blora is worst in May — around 40 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateMay 1839 µg/m³Feb 1126 µg/m³
PM2.5 (µg/m³)Level
Jan27Moderate
Feb25Moderate
Mar32Moderate
Apr35Poor
May40Poor
Jun37Poor
Jul34Moderate
Aug33Moderate
Sep35Poor
Oct39Poor
Nov34Moderate
Dec30Moderate
Location & terrain

Where is Blora?

Blora sits at 7.0°S, 111.4°E, 89 m above sea level, in Indonesia. The nearest listed city is Cepu, 27 km away.

Topography around Blora

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

Within 3 km, the terrain around Blora has only modest variations in elevation — a maximum elevation change of 35 m around an average of 88 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 396 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,224 m.

The land around Blora is covered by cropland (47%), artificial surfaces (27%) and trees (24%) within 3 km, trees (56%) and cropland (31%) within 16 km, and trees (40%), cropland (30%) and water (23%) within 80 km.

3 km
35 m
16 km
396 m
80 km
3,224 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cepu 27 km · Rembangan 31 km · Lasem 31 km · Juwana 41 km · Pati 48 km · Ngawi 48 km · Bojonegoro 55 km · Purwodadi 57 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 Blora (-6.9698°, 111.4186°, elevation 89 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).