Sumbawa Besar weather in September
In September, Sumbawa Besar sees average daytime highs of 31°C and overnight lows near 23°C, with 5 mm of rain across 1.2 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 54% 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 Sumbawa Besar's 1st-clearest and 4th-windiest month. For the whole year in context, see Sumbawa Besar's year-round climate.
- Daytime high
- 31°
- 3rd warmest
- Overnight low
- 23°
- 3rd coldest
- Rainfall
- 5 mm
- 1.2 wet days
- Daylight
- 12 hours
- 6:06 AM – 6:03 PM
- Cloud cover
- 41%
- 1st clearest
- Wind
- 9 km/h
- 4th windiest
- Solar energy
- 6.48 kWh/m²
- Travel score
- 5.5
- out of 10
Sumbawa Besar is place in Lesser Sunda Islands, Indonesia.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 31°C through the month.
A typical September day in Sumbawa Besar reaches about 31°C in the afternoon and slips back to 23°C overnight — a 9°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 on par with October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 22 |
| 2 | 31 | 22 |
| 3 | 31 | 22 |
| 4 | 31 | 22 |
| 5 | 31 | 22 |
| 6 | 31 | 22 |
| 7 | 31 | 22 |
| 8 | 31 | 22 |
| 9 | 31 | 22 |
| 10 | 31 | 22 |
| 11 | 31 | 23 |
| 12 | 31 | 23 |
| 13 | 31 | 23 |
| 14 | 31 | 23 |
| 15 | 31 | 23 |
| 16 | 31 | 23 |
| 17 | 31 | 23 |
| 18 | 31 | 23 |
| 19 | 31 | 23 |
| 20 | 31 | 23 |
| 21 | 31 | 23 |
| 22 | 31 | 23 |
| 23 | 31 | 23 |
| 24 | 31 | 23 |
| 25 | 31 | 23 |
| 26 | 31 | 23 |
| 27 | 31 | 23 |
| 28 | 32 | 23 |
| 29 | 32 | 23 |
| 30 | 32 | 23 |
How September really feels in Sumbawa Besar
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.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Sumbawa Besar 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.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 24° | 338 | 29.1 | 12.4 | 3.0 |
| Feb | 29° / 24° | 317 | 26.4 | 12.3 | 3.1 |
| Mar | 29° / 24° | 235 | 25.3 | 12.1 | 3.4 |
| Apr | 30° / 24° | 106 | 17 | 11.8 | 4.2 |
| May | 30° / 23° | 31 | 7 | 11.6 | 5.4 |
| Jun | 30° / 23° | 14 | 3.3 | 11.5 | 6.1 |
| Jul | 29° / 22° | 6 | 1.6 | 11.6 | 6.5 |
| Aug | 30° / 22° | 1 | 0.4 | 11.7 | 6.3 |
| Sep | 31° / 23° | 5 | 1.2 | 12 | 5.5 |
| Oct | 32° / 24° | 22 | 4.8 | 12.2 | 4.7 |
| Nov | 31° / 24° | 94 | 14.7 | 12.4 | 3.7 |
| Dec | 30° / 24° | 264 | 26.6 | 12.5 | 3.1 |
Cloud cover in September
The sky is clear or mostly clear about 54% of the time in September, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 75 | 75 | 75 | 75 | 76 | 76 | 76 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 71 | 71 | 71 | 71 | 69 | 69 | 68 |
| Cloudier (%) | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 29 | 29 | 29 | 29 | 31 | 31 | 32 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 75 | 25 |
| 2 | 75 | 25 |
| 3 | 75 | 25 |
| 4 | 75 | 25 |
| 5 | 76 | 24 |
| 6 | 76 | 24 |
| 7 | 76 | 24 |
| 8 | 75 | 25 |
| 9 | 75 | 25 |
| 10 | 75 | 25 |
| 11 | 75 | 25 |
| 12 | 75 | 25 |
| 13 | 75 | 25 |
| 14 | 75 | 25 |
| 15 | 75 | 25 |
| 16 | 74 | 26 |
| 17 | 74 | 26 |
| 18 | 74 | 26 |
| 19 | 74 | 26 |
| 20 | 73 | 27 |
| 21 | 73 | 27 |
| 22 | 73 | 27 |
| 23 | 73 | 27 |
| 24 | 71 | 29 |
| 25 | 71 | 29 |
| 26 | 71 | 29 |
| 27 | 71 | 29 |
| 28 | 69 | 31 |
| 29 | 69 | 31 |
| 30 | 68 | 32 |
Chance of precipitation in September
Sumbawa Besar gets around 5 mm of rain over 1.2 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 4% and peaks near 8% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 |
| Rain chance (%) | |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 3 |
| 4 | 3 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 3 |
| 9 | 3 |
| 10 | 3 |
| 11 | 3 |
| 12 | 3 |
| 13 | 3 |
| 14 | 3 |
| 15 | 4 |
| 16 | 4 |
| 17 | 4 |
| 18 | 4 |
| 19 | 5 |
| 20 | 5 |
| 21 | 5 |
| 22 | 6 |
| 23 | 6 |
| 24 | 6 |
| 25 | 7 |
| 26 | 7 |
| 27 | 7 |
| 28 | 7 |
| 29 | 7 |
| 30 | 8 |
Humidity in September
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 68% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 |
| Muggy (%) | 74 | 74 | 74 | 74 | 74 | 75 | 75 | 75 | 75 | 75 | 75 | 74 | 73 | 74 | 73 | 71 | 70 | 69 | 68 | 66 | 65 | 64 | 62 | 60 | 59 | 57 | 55 | 54 | 53 | 52 |
| Oppressive (%) | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 19 | 19 | 20 | 22 | 23 | 24 | 26 | 28 | 29 | 31 | 33 | 35 | 37 | 39 | 41 | 42 | 44 | 45 |
| Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|
| 1 | 9 | 74 | 17 |
| 2 | 9 | 74 | 17 |
| 3 | 9 | 74 | 17 |
| 4 | 9 | 74 | 17 |
| 5 | 9 | 74 | 17 |
| 6 | 8 | 75 | 17 |
| 7 | 8 | 75 | 17 |
| 8 | 8 | 75 | 17 |
| 9 | 8 | 75 | 17 |
| 10 | 8 | 75 | 17 |
| 11 | 8 | 75 | 17 |
| 12 | 8 | 74 | 18 |
| 13 | 8 | 73 | 19 |
| 14 | 7 | 74 | 19 |
| 15 | 7 | 73 | 20 |
| 16 | 7 | 71 | 22 |
| 17 | 7 | 70 | 23 |
| 18 | 7 | 69 | 24 |
| 19 | 6 | 68 | 26 |
| 20 | 6 | 66 | 28 |
| 21 | 6 | 65 | 29 |
| 22 | 5 | 64 | 31 |
| 23 | 5 | 62 | 33 |
| 24 | 5 | 60 | 35 |
| 25 | 4 | 59 | 37 |
| 26 | 4 | 57 | 39 |
| 27 | 4 | 55 | 41 |
| 28 | 4 | 54 | 42 |
| 29 | 3 | 53 | 44 |
| 30 | 3 | 52 | 45 |
Wind in September
Winds average 9 km/h in September.
Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in September
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 6:15 AM to 5:58 AM, and sunset from 6:05 PM to 6:02 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:15 | 6:14 | 6:14 | 6:13 | 6:13 | 6:12 | 6:11 | 6:11 | 6:10 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:07 | 6:06 | 6:05 | 6:05 | 6:04 | 6:04 | 6:03 | 6:02 | 6:02 | 6:01 | 6:01 | 6:00 | 5:59 | 5:59 | 5:58 | 5:58 |
| Sunset (PM) | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:05 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:04 | 6:03 | 6:03 | 6:03 | 6:03 | 6:03 | 6:03 | 6:03 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.8 | 6:15 | 6:05 |
| 2 | 11.8 | 6:14 | 6:05 |
| 3 | 11.9 | 6:14 | 6:05 |
| 4 | 11.9 | 6:13 | 6:05 |
| 5 | 11.9 | 6:13 | 6:05 |
| 6 | 11.9 | 6:12 | 6:05 |
| 7 | 11.9 | 6:11 | 6:04 |
| 8 | 11.9 | 6:11 | 6:04 |
| 9 | 11.9 | 6:10 | 6:04 |
| 10 | 11.9 | 6:10 | 6:04 |
| 11 | 11.9 | 6:09 | 6:04 |
| 12 | 11.9 | 6:08 | 6:04 |
| 13 | 11.9 | 6:08 | 6:04 |
| 14 | 11.9 | 6:07 | 6:04 |
| 15 | 11.9 | 6:07 | 6:03 |
| 16 | 12.0 | 6:06 | 6:03 |
| 17 | 12.0 | 6:05 | 6:03 |
| 18 | 12.0 | 6:05 | 6:03 |
| 19 | 12.0 | 6:04 | 6:03 |
| 20 | 12.0 | 6:04 | 6:03 |
| 21 | 12.0 | 6:03 | 6:03 |
| 22 | 12.0 | 6:02 | 6:02 |
| 23 | 12.0 | 6:02 | 6:02 |
| 24 | 12.0 | 6:01 | 6:02 |
| 25 | 12.0 | 6:01 | 6:02 |
| 26 | 12.0 | 6:00 | 6:02 |
| 27 | 12.0 | 5:59 | 6:02 |
| 28 | 12.1 | 5:59 | 6:02 |
| 29 | 12.1 | 5:58 | 6:02 |
| 30 | 12.1 | 5:58 | 6:02 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.48 kWh/m².
For context, solar energy here swings from a low near 4.84 kWh/m² to a high of 6.73 kWh/m² in October across the year — September's 6.48 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.1 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.1 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.3 | Intense |
| 7 | 6.3 | Intense |
| 8 | 6.3 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.4 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.6 | Intense |
| 23 | 6.6 | Intense |
| 24 | 6.6 | Intense |
| 25 | 6.6 | Intense |
| 26 | 6.6 | Intense |
| 27 | 6.7 | Intense |
| 28 | 6.7 | Intense |
| 29 | 6.7 | Intense |
| 30 | 6.7 | Intense |
Hazard calendar for Sumbawa Besar
None of Sumbawa Besar's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Sumbawa Besar sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Sumbawa Besar's monsoon runs December–March, when most of the year's rain falls.
Is September a good time to visit Sumbawa Besar?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Sumbawa Besar for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sumbawa Besar in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Sumbawa Besar sees daytime highs around 31°C and nights near 23°C. Pack light clothes and sun protection.
Sea temperature near Sumbawa Besar 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 14 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 30 | 29 | 29 | 28 | 28 | 28 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Warm |
| Aug | 28 | Warm |
| Sep | 28 | Warm |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in Sumbawa Besar in September
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 Sumbawa Besar peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 15 | 15 | 13 | 11 | 10 | 9 | 12 | 13 | 13 | 11 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Very high |
| Jul | 9 | Very high |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Air quality in Sumbawa Besar in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Sumbawa Besar is worst in October — around 30 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (March, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 10 | 10 | 10 | 12 | 12 | 12 | 15 | 23 | 30 | 21 | 13 |
| Level | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 10 | Good |
| Mar | 10 | Good |
| Apr | 10 | Good |
| May | 12 | Good |
| Jun | 12 | Good |
| Jul | 12 | Moderate |
| Aug | 15 | Moderate |
| Sep | 23 | Moderate |
| Oct | 30 | Moderate |
| Nov | 21 | Moderate |
| Dec | 13 | Moderate |
Where is Sumbawa Besar?
Sumbawa Besar sits at 8.5°S, 117.4°E, 14 m above sea level, in Indonesia. The nearest listed city is Taliwang, 68 km away.
Topography around Sumbawa Besar
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sumbawa Besar.
Within 3 km, the terrain around Sumbawa Besar has only modest variations in elevation — a maximum elevation change of 115 m around an average of 32 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,795 m.
The land around Sumbawa Besar is covered by grassland (33%), trees (24%) and artificial surfaces (23%) within 3 km, trees (31%), water (25%) and grassland (22%) within 16 km, and water (54%) and trees (32%) within 80 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
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 Sumbawa Besar (-8.4932°, 117.4202°, elevation 14 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).