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Castle Bruce Weather in September
September in Castle Bruce brings high temperatures around 29°C (84°F) during the day, dropping to 26°C (79°F) at night, with quite a bit of rainfall expected, averaging around 156 mm (6.1 in) for the month.
Rainfall in Castle Bruce in September
Expect around 23 days of rain based on historical data, with 156 mm (6.1 in) average. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Castle Bruce in September
Expect highs of 29°C (84°F) in Castle Bruce in September, with nights dropping to around 26°C (79°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Castle Bruce in September
Enjoy a sunny month with about 212 hours of sunshine, the clear skies make Castle Bruce even more beautiful.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Castle Bruce. Our weather planner can help you explore destinations with more pleasant weather conditions.
Castle Bruce Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
76%
Precipitation
156 mm (6.1 in)
Rainy days
23 days
Humidity
72% *
Sunshine
212 hours *
Percentage Sunshine
*
* Data from: Douglas-Charles Airport, Dominica (11 KM, 6 Miles).
Castle Bruce Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castle Bruce - and find the best time to visit.
Daily Historical Temperatures
42-year average (1976-2025)
Based on our historical records, temperatures in Castle Bruce typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Historical weather records for Castle Bruce in September
Browse day-by-day weather records for Castle Bruce spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Castle Bruce historical weather extremes in September
Based on 22 years of weather observations (2003-2025), these are the most extreme conditions recorded in Castle Bruce.
- The hottest September day on record in Castle Bruce reached 34°C (93°F) (September 1, 2005).
- Castle Bruce experienced its chilliest September day on September 17, 2022, reaching only 27°C (81°F).
- Nighttime temperatures dropped to 9°C (48°F) on September 4, 2023, marking the coldest September night on record.
Best Places in Dominica in September
Find out more about the weather in Dominica and which places have the best travel conditions in this month. See all of Dominica in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Castle Bruce in September
Warm but pleasant conditions in Castle Bruce in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Castle Bruce in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Castle Bruce 3-Day Forecast
More climate data for Castle Bruce
Temperature Rainfall Sunshine Humidity
See the full Castle Bruce climate overview or explore weather in Dominica.
Popular in September
Where to go in September - average daytime high across popular destinations.
Salisbury
29°C (84°F) Scotts Head Village29°C (84°F) Roseau29°C (84°F) Marigot29°C (84°F) Portsmouth29°C (84°F) Calibishie29°C (84°F) Pont Cassé29°C (84°F) Castle Bruce
29°C (84°F) Bucket list
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