Island Harbour Weather in September
September in Island Harbour sees daytime temperatures around 30°C (86°F) and lows of 27°C (81°F) at night. With around 134 mm (5.3 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Island Harbour in September
You can expect rain on roughly 19 days based on historical data, averaging 134 mm (5.3 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Island Harbour in September
Temperatures in Island Harbour in September top out at 30°C (86°F) and drop to 27°C (81°F) overnight. This kind of day-to-night contrast is typical for this time of year. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.
Sunshine in Island Harbour in September
The days are predominantly sunny, with an estimated total of around 232 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.September in Island Harbour can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, 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 Anguilla, check out our Island Harbour's climate page.
Island Harbour Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
62%
Precipitation
134 mm (5.3 in)
Rainy days
19 days
Humidity
78% *
Sunshine
232 hours *
Percentage Sunshine
61% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Island Harbour 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
Historical weather for Island Harbour in September
Browse day-by-day weather records for Island Harbour spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Island Harbour historical weather extremes in September
The extremes listed below come from historical weather data collected in Island Harbour from 1990 through 2025.
- The hottest September day on record in Island Harbour reached 38°C (100°F) (September 15, 2006).
- The coldest September day was on September 21, 2008, with a maximum of 27°C (81°F).
- The coldest night in September in Island Harbour was on September 25, 2019, with a minimum of 22°C (72°F).
Best Places in Anguilla in September
Find out more about the weather in Anguilla and which places have the best travel conditions in this month. See all of Anguilla in September →
perfect weather
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What to Wear in Island Harbour in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Island Harbour 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 Anguilla, check out our Island Harbour's climate page.
Temperature Rainfall Sunshine Humidity
See the full Island Harbour climate overview or explore weather in Anguilla.
