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Climate · Southwest Sumba

Southwest Sumba in December

Hot and wet, as the days hold steady.

Typical weather, averaged over 30 years

December in Southwest Sumba is hot: highs near 87°F, lows near 79°F. Rain falls on about six days a week, and daylight holds at about 12 hours 40 minutes.December in Southwest Sumba is hot: highs near 31°C, lows near 26°C. Rain falls on about six days a week, and daylight holds at about 12 hours 40 minutes.

High
87°F31°Caverage
Low
79°F26°Caverage
Wet days
6a week · 83% of days
Daylight
12h 40mon average

Is December a good time to visit Southwest Sumba?

December sits outside Southwest Sumba's most comfortable months, which run from June to September. Expect hot days and rain on about six days a week.

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 December sits in the year

week by week

Temperature

Highs near 87°F in December, against 86°F to 89°F through the year.Highs near 31°C in December, against 30°C to 32°C through the year.

Chance of a wet day

83% of days in December, against 7% to 91% through the year.

Cloud cover

78% cover in December, against 54% to 78% through the year.

Daylight

12h 40m in December, against 11h 35m to 12h 40m through the year.

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

Either side

  1. November89°32°low 80°low 27°4 wet days a weekRain on about four days a week.
  2. December87°31°low 79°low 26°6 wet days a weekRain on about six days a week.
  3. January86°30°low 78°low 26°6 wet days a weekRain on about six days a week.

Where Southwest Sumba sits, in December

Asia/Makassar
this place
typical high in December 40°F4°C95°F35°C
Sunrise, mid-December
5:39 AMsets 6:20 PM
Above the sea
0 mlow-lying
Latitude
9.5°Ssouthern hemisphere
Nearest of ours
West Sumba57 km south-east

The land around Southwest Sumba, shaded by its typical high in December, 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 December

high · low · wet days
See December on the planning mapThe whole year in Southwest Sumba

Typical weather, averaged over 30 years (1995–2024), read 8 km north-east of Southwest Sumba. 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 (52 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 (52 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.