Oranjestad climate — normals and trends
Oranjestad (Aruba) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 600 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 (25.4 °C). Rainfall peaks in November.
Oranjestad averages 0 frost days, 0 hot days (≥ 30 °C) and 132 rainy days per year.
Oranjestad 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 30.1 °C (on 28 August 2023) and the coldest 22.1 °C (on 1 February 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
Oranjestad
- coords
- 12.52°, -70.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
27.0°C
Average daily low
25.9°C
Annual rainfall
600mm
Sunshine / day
11.3h
Mean relative humidity
84%
Average peak wind
35.7km/h
Seasonal range
2.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.3 °C
Average feels-like low
26.9 °C
Average peak gust
47.8 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
21.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.44 · 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
30.1 °C
28 August 2023
Coldest day
22.1 °C
1 February 1950
Wettest day
111 mm
14 October 2008
Windiest day
53.2 km/h
16 November 1999
Strongest gust
74.9 km/h
8 August 1993
Hottest feels-like
37.9 °C
6 October 2023
Coldest feels-like
21.0 °C
8 March 2009
Sunniest day
12.7 h
3 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 | 27.2 °C | +1.1 °C | 57 mm | +22 mm |
| Feb | 26.6 °C | +0.7 °C | 23 mm | +1 mm |
| Mar | 26.7 °C | +0.8 °C | 10 mm | -5 mm |
| Apr | 27.0 °C | +0.6 °C | 21 mm | -4 mm |
| May | 27.8 °C | +0.9 °C | 27 mm | -9 mm |
| Jun | 27.3 °C | +0.1 °C | 34 mm | +5 mm |
| Jul | 27.8 °C | +0.6 °C | 6 mm | -21 mm |
| Aug | 28.4 °C | +0.7 °C | 27 mm | -5 mm |
| Sep | 29.0 °C | +0.9 °C | 10 mm | -46 mm |
| Oct | 29.1 °C | +1.1 °C | 96 mm | -21 mm |
| Nov | 28.1 °C | +0.6 °C | 53 mm | -79 mm |
| Dec | 27.3 °C | +0.5 °C | 59 mm | -15 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 Oranjestad?
Oranjestad has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 600 mm of precipitation per year.
What is the hottest day ever recorded in Oranjestad?
The hottest day measured in Oranjestad between 1940 and 2025 was 28 August 2023, reaching 30.1 °C.
What is the coldest day in Oranjestad?
The coldest day measured in Oranjestad between 1940 and 2025 was 1 February 1950, at 22.1 °C.
Does it snow in Oranjestad?
Almost never: Oranjestad sees virtually no snow, with about 0 frost days per year.
Has the climate of Oranjestad warmed?
Yes: Oranjestad warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Oranjestad?
The wettest day measured in Oranjestad between 1940 and 2025 was 14 October 2008, with 111 mm of rain in 24 hours.
What was the windiest day in Oranjestad?
The windiest day measured in Oranjestad between 1940 and 2025 was 16 November 1999, with winds reaching 53.2 km/h.
What is the warmest month in Oranjestad?
The warmest month in Oranjestad is September (27.6 °C on average); the coldest is February (25.4 °C).
How much does it rain in Oranjestad?
Oranjestad receives on average 600 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Oranjestad?
Oranjestad gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in Oranjestad?
Yes: Oranjestad has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Oranjestad?
In Oranjestad, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 6 October 2023, and the lowest was 21.0 °C on 8 March 2009.
Compare Oranjestad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Oranjestad