Bima weather in September

In September, Bima sees average daytime highs of 31°C and overnight lows near 23°C, with 13 mm of rain across 1.8 wet days and about 12 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels muggy.

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 Bima's 1st-clearest and 4th-windiest month. For the whole year in context, see Bima's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
23°
3rd coldest
Rainfall
13 mm
1.8 wet days
Daylight
12 hours
6:01 AM – 5:58 PM
Cloud cover
41%
1st clearest
Wind
8 km/h
4th windiest
Solar energy
6.88 kWh/m²
Travel score
5.6
out of 10

Bima is city in West Nusa Tenggara Province, Indonesia.

Density
743/km²
people per km²
Founded
2002

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 31°C through the month.

A typical September day in Bima reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 32°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43122
53122
63122
73122
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123

How September really feels in Bima

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.

Bima weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°39928.712.42.9
Feb29° / 24°35926.112.32.9
Mar30° / 24°3142612.13.2
Apr30° / 24°17419.111.83.9
May30° / 24°588.511.65.3
Jun29° / 23°295.711.55.9
Jul29° / 22°19311.66.4
Aug30° / 22°41.311.76.3
Sep31° / 23°131.8125.6
Oct32° / 24°396.312.24.6
Nov32° / 25°15815.912.43.6
Dec30° / 25°35927.412.52.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27525
37525
47525
57525
67525
77525
87525
97525
107525
117426
127426
137327
147327
157327
167228
177228
187129
197129
207129
217129
227129
237030
247030
257030
267030
277030
286931
296832
306832

Chance of precipitation in September

Any precipitation

Bima gets around 13 mm of rain over 1.8 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 7% and peaks near 11% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
14
24
34
44
54
64
74
85
95
105
115
125
135
146
156
166
177
187
197
208
218
228
238
249
259
269
2710
2810
2910
3011

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 98% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1365320
2365320
3364330
4364330
5364330
6265330
7264340
8264340
9264340
10263350
11164350
12163360
13163360
14161371
15160381
16160381
17159391
18157402
19254422
20253432
21251443
22250453
23249473
24147483
25145504
26144514
27142534
28141544
29139564
30138574

Wind in September

Winds average 8 km/h in September.

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.

0246810151015202530
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 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 6:10 AM to 5:52 AM, and sunset from 6:00 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:106:00
211.86:096:00
311.96:096:00
411.96:086:00
511.96:075:59
611.96:075:59
711.96:065:59
811.96:065:59
911.96:055:59
1011.96:045:59
1111.96:045:59
1211.96:035:59
1311.96:035:58
1411.96:025:58
1511.96:015:58
1612.06:015:58
1712.06:005:58
1812.06:005:58
1912.05:595:58
2012.05:585:58
2112.05:585:57
2212.05:575:57
2312.05:575:57
2412.05:565:57
2512.05:555:57
2612.05:555:57
2712.05:545:57
2812.05:545:57
2912.15:535:56
3012.15:525:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.88 kWh/m².

For context, solar energy here swings from a low near 5.2 kWh/m² to a high of 7.21 kWh/m² in October across the year — September's 6.88 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.6Intense
36.6Intense
46.6Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.9Intense
156.9Intense
166.9Intense
176.9Intense
186.9Intense
197.0Intense
207.0Intense
217.0Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.1Intense
277.1Intense
287.1Intense
297.1Intense
307.1Intense
Planning a trip in September

Hazard calendar for Bima

In seasonPeak

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

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

Bima's monsoon runs December–March, 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 Bima?

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

5.6
Sightseeing
4th-best month of the year
8.1
Beach & pool
3rd-best month of the year

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

What to pack for Bima in September

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

In September, Bima sees daytime highs around 31°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Bima in September

The nearest coast averages about 28°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
Feb28Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul28Warm
Aug28Warm
Sep28Warm
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Bima in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bima peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 15UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug12Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec13Extreme

Air quality in Bima 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 Bima is worst in October — around 27 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (February, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateOct 1726 µg/m³Feb 229 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb9Good
Mar9Good
Apr12Good
May14Moderate
Jun13Moderate
Jul12Good
Aug14Moderate
Sep21Moderate
Oct27Moderate
Nov21Moderate
Dec12Moderate
Location & terrain

Where is Bima?

Bima sits at 8.5°S, 118.7°E, 15 m above sea level, in Indonesia. The nearest listed city is Dompu, 30 km away.

Topography around Bima

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

Within 3 km, the terrain around Bima has significant variations in elevation — a maximum elevation change of 347 m around an average of 31 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,078 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,274 m.

The land around Bima is covered by water (31%), trees (25%) and artificial surfaces (22%) within 3 km, trees (36%) and grassland (30%) within 16 km, and water (67%) within 80 km.

3 km
347 m
16 km
1,078 m
80 km
2,274 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Dompu 30 km · Tambolaka 121 km · Labuan Bajo 128 km · Sumbawa Besar 144 km · Ruteng 192 km · Taliwang 208 km · Waingapu 215 km · Selong 242 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 Bima (-8.4601°, 118.7267°, elevation 15 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).