Willemstad climate — normals and trends
Willemstad (Curaçao) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 757 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is September (27.6 °C on average) and the coldest is February (25.5 °C). Rainfall peaks in November.
Willemstad averages 0 frost days, 0 hot days (≥ 30 °C) and 177 rainy days per year.
Willemstad has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.3 °C (on 14 August 2024) and the coldest 22.2 °C (on 9 January 1950).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Willemstad
- coords
- 12.12°, -68.89°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
27.0°C
Average daily low
26.0°C
Annual rainfall
757mm
Sunshine / day
11.2h
Mean relative humidity
83%
Average peak wind
33.5km/h
Seasonal range
2.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
177 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.6 °C
Average feels-like low
27.3 °C
Average peak gust
44.9 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
21.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.41 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
30.3 °C
14 August 2024
Coldest day
22.2 °C
9 January 1950
Wettest day
130 mm
2 November 2010
Windiest day
52.8 km/h
8 August 1993
Strongest gust
73.4 km/h
8 August 1993
Hottest feels-like
38.5 °C
4 October 2023
Coldest feels-like
21.8 °C
17 January 2000
Sunniest day
12.7 h
16 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 27.3 °C | +1.1 °C | 74 mm | +24 mm |
| Feb | 26.6 °C | +0.7 °C | 30 mm | -0 mm |
| Mar | 26.7 °C | +0.7 °C | 17 mm | -6 mm |
| Apr | 27.0 °C | +0.6 °C | 47 mm | +10 mm |
| May | 27.9 °C | +0.9 °C | 46 mm | -3 mm |
| Jun | 27.6 °C | +0.4 °C | 87 mm | +34 mm |
| Jul | 27.9 °C | +0.7 °C | 19 mm | -30 mm |
| Aug | 28.5 °C | +0.7 °C | 49 mm | -2 mm |
| Sep | 29.1 °C | +0.9 °C | 9 mm | -51 mm |
| Oct | 29.3 °C | +1.2 °C | 75 mm | -42 mm |
| Nov | 28.2 °C | +0.6 °C | 77 mm | -71 mm |
| Dec | 27.4 °C | +0.5 °C | 72 mm | -20 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Willemstad?
Willemstad has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 757 mm of precipitation per year.
What is the hottest day ever recorded in Willemstad?
The hottest day measured in Willemstad between 1940 and 2025 was 14 August 2024, reaching 30.3 °C.
What is the coldest day in Willemstad?
The coldest day measured in Willemstad between 1940 and 2025 was 9 January 1950, at 22.2 °C.
Does it snow in Willemstad?
Almost never: Willemstad sees virtually no snow, with about 0 frost days per year.
Has the climate of Willemstad warmed?
Yes: Willemstad warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Willemstad?
The wettest day measured in Willemstad between 1940 and 2025 was 2 November 2010, with 130 mm of rain in 24 hours.
What was the windiest day in Willemstad?
The windiest day measured in Willemstad between 1940 and 2025 was 8 August 1993, with winds reaching 52.8 km/h.
What is the warmest month in Willemstad?
The warmest month in Willemstad is September (27.6 °C on average); the coldest is February (25.5 °C).
How much does it rain in Willemstad?
Willemstad receives on average 757 mm of precipitation per year, spread over about 177 rainy days.
Is it sunny in Willemstad?
Willemstad gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Willemstad?
Yes: Willemstad has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Willemstad?
In Willemstad, between 1940 and 2025, the highest apparent temperature reached 38.5 °C on 4 October 2023, and the lowest was 21.8 °C on 17 January 2000.
Compare Willemstad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Willemstad