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Climate · Willemstad

Willemstad in September

Hot and wet, as the days shorten.

Typical weather, averaged over 30 years

September in Willemstad is hot: highs near 88°F, lows near 81°F. Rain falls on about four days a week, more often as the month goes on, and the days shorten by 15 minutes from the first week to the last.September in Willemstad is hot: highs near 31°C, lows near 27°C. Rain falls on about four days a week, more often as the month goes on, and the days shorten by 15 minutes from the first week to the last.

High
88°F31°Caverage
Low
81°F27°Caverage
Wet days
4a week · 52% of days
Daylight
12h 10mon average

Is September a good time to visit Willemstad?

A good month, just outside Willemstad's best months, which run from February to May.

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 84°F to 88°F through the year.Highs near 31°C in September, against 29°C to 31°C through the year.

Chance of a wet day

52% of days in September, against 30% to 83% through the year.

Cloud cover

70% cover in September, against 51% to 73% through the year.

Daylight

12h 10m in September, against 11h 25m to 12h 49m 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 80°low 27°3 wet days a weekRain on about three days a week.
  2. September88°31°low 81°low 27°4 wet days a weekRain on about four days a week.
  3. October87°31°low 80°low 27°5 wet days a weekRain on about five days a week.

Where Willemstad sits, in September

America/Curacao
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:25 AMsets 6:37 PM
Above the sea
0 mlow-lying
Latitude
12.1°Nnorthern hemisphere
Nearest of ours
our one place here

The land around Willemstad, 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. Willemstad is our one place in Curaçao so far. Clock times are local, for the 15th.

See September on the planning mapThe whole year in Willemstad

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Willemstad. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. 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.