Frederiksted Weather in September
September in Frederiksted brings high temperatures, with daytime highs of 30°C (86°F) and nights around 27°C (81°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Frederiksted in September
With peak rainfall occurring this month, heavy downpours are common. It's advisable to have a poncho on hand to manage the rain. Typically around 18 days of rainfall are expected, averaging 155 mm (6.1 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Frederiksted in September
If you're visiting Frederiksted in September, expect highs of 30°C (86°F) and overnight lows 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.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Frederiksted. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit US Virgin Islands, check out our Frederiksted's climate page.
Frederiksted Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
60%
Precipitation
155 mm (6.1 in)
Rainy days
18 days
Daily Historical Temperatures
45-year average (1976-2025)
Based on our historical records, temperatures in Frederiksted 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
45-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 Frederiksted in September
Browse day-by-day weather records for Frederiksted spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Frederiksted historical weather extremes in September
Based on weather observations in Frederiksted between 1999 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Frederiksted reached 44°C (111°F) (September 14, 2013).
- The coldest September day was on September 15, 2004, with a maximum of 26°C (79°F).
- Frederiksted registered its coldest September night on September 14, 2017, with temperatures dropping to 22°C (72°F).
Best Places in US Virgin Islands in September
Find out more about the weather in US Virgin Islands and which places have the best travel conditions in this month. See all of US Virgin Islands in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Frederiksted 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). Also bring a poncho, it will rain a lot! Waterproof everything you can.What To Do in Frederiksted 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 US Virgin Islands, check out our Frederiksted's climate page.
See the full Frederiksted climate overview or explore weather in US Virgin Islands.
