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Climate · Sumbawa

Sumbawa in September

Hot and dry, as the days hold steady.

Typical weather, averaged over 30 years

September in Sumbawa is hot: highs near 88°F, lows near 76°F. Rain is rare, and daylight holds at about 12 hours 4 minutes.September in Sumbawa is hot: highs near 31°C, lows near 24°C. Rain is rare, and daylight holds at about 12 hours 4 minutes.

High
88°F31°Caverage
Low
76°F24°Caverage
Wet days
0a week · 6% of days
Daylight
12h 04mon average

Is September a good time to visit Sumbawa?

Yes. September is one of Sumbawa's best months (June to September).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 88°F in September, against 85°F to 89°F through the year.Highs near 31°C in September, against 29°C to 32°C through the year.

Chance of a wet day

6% of days in September, against 3% to 92% through the year.

Cloud cover

58% cover in September, against 55% to 80% through the year.

Daylight

12h 04m in September, against 11h 39m to 12h 36m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August87°31°low 76°low 24°no wet daysRain on fewer than one day a week.
  2. September88°31°low 76°low 24°no wet daysRain on fewer than one day a week.
  3. October89°32°low 78°low 26°1 wet day a weekRain on about one day a week.

Where Sumbawa sits, in September

Asia/Makassar
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:04 AMsets 6:07 PM
Above the sea
0 mlow-lying
Latitude
8.3°Ssouthern hemisphere
Nearest of ours
Southwest Sumba212 km south-east

The land around Sumbawa, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Indonesia in September

high · low · wet days
See September on the planning mapThe whole year in Sumbawa

Typical weather, averaged over 30 years (1995–2024), read 7 km north of Sumbawa. Its own grid square is mostly sea and holds only a daily average, so the page reads the nearest square with a true high and low near the town's height. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (96 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (0 m) against the climate model's (96 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.