Kotabumi weather in September

In September, Kotabumi sees average daytime highs of 33°C and overnight lows near 24°C, with 65 mm of rain across 11.5 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-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 14% 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 hours by month's end. Set against the rest of the year, September is Kotabumi's 4th-clearest and 1st-windiest month. For the whole year in context, see Kotabumi's year-round climate.

Daytime high
33°
1st warmest
Overnight low
24°
3rd coldest
Rainfall
65 mm
11.5 wet days
Daylight
12 hours
5:56 AM – 5:54 PM
Cloud cover
69%
4th clearest
Wind
8 km/h
1st windiest
Solar energy
5.72 kWh/m²
Travel score
3.1
out of 10

Kotabumi is capital of North Lampung Regency, Lampung Province, Indonesia.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 Kotabumi reaches about 33°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253424
263424
273424
283424
293424
303424

How September really feels in Kotabumi

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.

Kotabumi weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°25327.712.22.6
Feb31° / 24°22924.812.22.6
Mar32° / 24°28128.7122.3
Apr32° / 24°2382711.92.4
May32° / 24°16324.311.82.7
Jun31° / 24°10619.811.73.2
Jul31° / 23°9516.911.73.6
Aug32° / 23°7113.411.83.5
Sep33° / 24°6511.5123.1
Oct33° / 24°13317.212.12.7
Nov32° / 24°2302512.22.4
Dec31° / 24°29628.812.32.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23961
33961
43961
53961
63862
73763
83763
93664
103664
113664
123565
133565
143565
153664
163664
173664
183565
193565
203565
213466
223466
233466
243466
253367
263367
273367
283367
293268
303268

Chance of precipitation in September

Any precipitation

Kotabumi gets around 65 mm of rain over 11.5 wet days in September, the driest month. 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 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
342
441
541
640
740
839
939
1038
1138
1238
1338
1438
1538
1638
1738
1838
1938
2038
2138
2239
2339
2439
2539
2639
2740
2840
2940
3041

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1123733
2124723
3125713
4126703
5127693
6228682
7229672
8230662
9231652
10231652
11132652
12132652
13132652
14132652
15132643
16132643
17132643
18132643
19131653
20131644
21131644
22131644
23130654
24130645
25130645
26130645
27130636
28130636
29130636
30129637

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
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 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:03 AM to 5:49 AM, and sunset from 5:57 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:035:57
211.96:035:57
311.96:025:57
411.96:025:57
511.96:015:57
611.96:015:56
711.96:005:56
811.96:005:56
911.95:595:56
1011.95:595:55
1112.05:585:55
1212.05:585:55
1312.05:575:55
1412.05:575:54
1512.05:565:54
1612.05:565:54
1712.05:555:54
1812.05:555:54
1912.05:545:53
2012.05:545:53
2112.05:535:53
2212.05:535:53
2312.05:525:52
2412.05:525:52
2512.05:515:52
2612.05:515:52
2712.05:505:52
2812.05:505:51
2912.05:495:51
3012.05:495:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.72 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 5.72 kWh/m² in September across the year — September's 5.72 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Is September a good time to visit Kotabumi?

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

3.1
Sightseeing
4th-best month of the year
5.7
Beach & pool
2nd-best month of the year

September is a weaker month for outdoor sightseeing in Kotabumi.

What to pack for Kotabumi in September

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

In September, Kotabumi sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Kotabumi 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 Kotabumi peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 17 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeExtremeFeb 22UV 15Nov 17UV 9
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug10Extreme
Sep12Extreme
Oct13Extreme
Nov9Very high
Dec12Extreme

Air quality in Kotabumi 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 Kotabumi is worst in October — around 82 µg/m³ PM2.5 (unhealthy), about 2.7× the cleanest month (January, 30 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorOct 1380 µg/m³Jan 2330 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb31Moderate
Mar36Poor
Apr39Poor
May39Poor
Jun43Poor
Jul47Poor
Aug51Poor
Sep71Unhealthy
Oct82Unhealthy
Nov54Poor
Dec37Poor
Location & terrain

Where is Kotabumi?

Kotabumi sits at 4.8°S, 104.9°E, 37 m above sea level, in Indonesia. The nearest listed city is Terbanggi Besar, 38 km away.

Topography around Kotabumi

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

Within 3 km, the terrain around Kotabumi has only modest variations in elevation — a maximum elevation change of 32 m around an average of 34 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 109 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,072 m.

The land around Kotabumi is covered by trees (64%) and artificial surfaces (30%) within 3 km, trees (82%) within 16 km, and trees (82%) within 80 km.

3 km
32 m
16 km
109 m
80 km
2,072 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Terbanggi Besar 38 km · Metro 57 km · Bandar Lampung 79 km · Baturaja 111 km · Tanjungagung 155 km · Prabumulih 171 km · Indralaya 176 km · Cilegon 185 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 Kotabumi (-4.8251°, 104.8817°, elevation 37 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. 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).