Oranjestad Weather in September
In Oranjestad, September brings high daytime temperatures around 30°C (86°F), with nights cooling to 27°C (81°F). It is the wettest month of the year, so expect more rainfall than usual.
Rainfall in Oranjestad in September
Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Looking at the last 30 years, the data shows about 18 days with rain, averaging 131 mm (5.2 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Oranjestad in September
September in Oranjestad brings high temperatures, with highs of 30°C (86°F) and nights around 27°C (81°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Average water temperature in September
With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.September in Oranjestad has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bonaire, St Eustatius, Saba, check out our Oranjestad's climate page.
Oranjestad Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F) *
Chance of Rain
60%
Precipitation
131 mm (5.2 in)
Rainy days
18 days
Humidity
78% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Oranjestad typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Oranjestad in September
Browse day-by-day weather records for Oranjestad spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Oranjestad historical weather extremes in September
Based on 35 years of weather observations in Oranjestad between 1990 and 2025, these are the recorded extremes.
- Oranjestad recorded its highest September temperature of 39°C (102°F) on September 1, 2003.
- Oranjestad experienced its chilliest September day on September 17, 2022, reaching only 27°C (81°F).
- The lowest overnight temperature recorded in September was 22°C (72°F) (September 30, 2017).
Best Places in Bonaire, St Eustatius, Saba in September
Find out more about the weather in Bonaire, St Eustatius, Saba and which places have the best travel conditions in this month. See all of Bonaire, St Eustatius, Saba in September →
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What to Wear in Oranjestad in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes.What To Do in Oranjestad in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bonaire, St Eustatius, Saba, check out our Oranjestad's climate page.
Temperature Rainfall Humidity Water Temp
See the full Oranjestad climate overview or explore weather in Bonaire, St Eustatius, Saba.
