Climate and monthly weather forecastCastle Bruce, Dominica
Climate and monthly weather forecast
The climate of Castle Bruce
Castle Bruce, situated on Dominica island, features an Af - Tropical Rainforest, Köppen climate classification. This climate type is known for heavy precipitation and consistent temperatures throughout the year. The island's position in the tropical in Caribbean Sea influences Castle Bruce's temperature variations, which are modest and range from 24.9°C (76.8°F) to 28.9°C (84°F).Relative humidity hovers around the midpoint of 70%, with the maximum being 78% in July and August. The sea temperature, following the overall tropical pattern, ranges from a pleasant 26.8°C (80.2°F) to a warm 29.4°C (84.9°F). Highlighting the region's tropical nature, Castle Bruce receives substantial rainfall throughout the year. Precipitation peaks from July to November, with August seeing the highest average of 99mm (3.9"). In terms of wind speeds, they vary between 19.9km/h (12.4mph) and 26.6km/h (16.5mph).
Unusual patterns are relatively rare due to the tropical climate's reliable consistency. However, the most notable distinction is a significant increase in average rainfall and a dip in visibility during warmer months. Comparing to colder months, these tend to drop slightly. Looking at wind speeds, these figures tend to be relatively stable, but they do peak slightly from January, reducing gradually until they reach their lowest in October.
The best time to visit Castle Bruce
When planning a trip to Castle Bruce, the months of February to April are arguably the best time to visit. During this period, Castle Bruce experiences the lowest average rainfall, with February witnessing the least rainfall of 28mm (1.1"). Additionally, humidity is relatively low, and daylight hours begin to lengthen from 11.7 hours in February to 12.5 hours in April. The sea temperatures during these months hover around a comfortable 27°C (80.6°F), creating ideal conditions for outdoor and water-based activities.The worst time to visit Castle Bruce
Travelers looking to avoid heavy rain and high humidity in Castle Bruce should steer clear of the period from July to November. These months see the highest average rainfall with August witnessing up to 99mm (3.9") of precipitation. Concurrently, humidity levels peak, and cloud cover increases, resulting in less sunshine and lower visibility. Despite these factors, sea temperatures remain stable and high, averaging around 29°C (84.2°F).Spring weather in Castle Bruce
The spring season in Castle Bruce, falling in March, April, and May, ushers in increased daylight hours and rising temperatures. Daylight hours climb from 12.1 hours in March to 12.9 hours in May. At the same time, average high temperatures range from 26.4°C (79.5°F) to 27.9°C (82.2°F). Rainfall during the spring months, however, escalates, increasing from 33mm (1.3") in March to 61mm (2.4") in May.Summer weather in Castle Bruce
Summer in Castle Bruce, spanning June to August, delivers the highest average temperatures of the year, peaking at 28.8°C (83.8°F) in August. Rainfall is considerably high, with a peak of 99mm (3.9") in August. Similarly, humidity is on the rise during these months, reaching a high of 78% in July and August. Sea temperatures also hit their annual peak during summer, with a maximum of 29°C (84.2°F).Autumn weather in Castle Bruce
Autumn weather in Castle Bruce is characterized by a slight decrease in temperature and daylight hours. Average high temperatures decline from 28.9°C (84°F) in September to 27.4°C (81.3°F) in December, while daylight hours reduce from 12.2 hours in September to 11.2 hours in December. Rainfall remains high during the autumn months but begins to decrease slightly towards the end of the year.Winter weather in Castle Bruce
Winter in Castle Bruce witnesses a further decrease in temperatures with average highs ranging from 26.6°C (79.9°F) in January to 27.1°C (80.8°F) in February. Despite being part of the drier season, Castle Bruce sees a reasonable amount of rainfall, with January experiencing an average of 41mm (1.61"). Daylight hours are shortest during winter, with 11.3 hours in January, gradually lengthening to 11.7 hours in February. Furthermore, sea temperatures are lower but still quite pleasant, ranging from 27.3°C (81.1°F) to 26.8°C (80.2°F).Weather in January
In Castle Bruce, Dominica, January is typically characterized by warm, slightly humid conditions. While a modest drop in temperature compared to December occurs, the effect on the overall weather is relatively minimal. The new year starts with a gentle nudge from the wind, maintaining an average speed of 26.6km/h (16.5mph). Weather in January »Weather in February
Coming into February, the temperature follows a slightly decreasing trend established in January. This modest cool-off is complemented by the prevailing wind conditions that have dropped marginally to an average speed of 26.2km/h (16.3mph). Weather in February »Weather in March
The month of March heralds a minor rise in temperature, setting the stage for the warmer months to follow. Wind speeds lessen to an average of 24.3km/h (15.1mph), providing a nice breeze to accompany March days. A negligible change in relative humidity and a slight increase in rainfall signals the transition towards the wetter latter half of the year. Weather in March »Weather in April
April welcomes further warmth, initiating the approach of summer. Wind speeds see another minor decrease, and rainfall features a marked increase from 33mm (1.3") to 51mm (2.01"), an indication of the rainier months to come. April continues the trend set by March with increased daylight and sunshine hours, ensuring a warm and well-lit environment. Weather in April »Weather in May
May signifies the approach of peak summer with a steady rise in temperature. Weather conditions experience a turn towards the wetter side, with the rainfall up to 61mm (2.4"). The wind speed remains nearly constant at an average of 24.1km/h (15mph), and the daylight and sunshine hours continue to increase. Weather in May »Weather in June
June marks the beginning of the hurricane season in the Caribbean, and Castle Bruce, Dominica isn't an exception. The month witnesses further escalation in temperatures and sees the rainfall level steady at 51mm (2.01"). The wind speed witnesses a slight increase, providing respite from the ceaseless heat. Weather in June »Weather in July
July perpetuates the rainy season in Castle Bruce, with the highest recorded rainfall in the year at 89mm (3.5"). The relative humidity, which has been on a gradual rise since the start of the year, hits its peak value. Despite the surge in rainfall, the wind speed stays almost constant, providing relief from the warm, humid weather. Weather in July »Weather in August
August, being the heart of the hurricane season, features the most significant rainfall of the year, escalating up to 99mm (3.9"). Alongside, it also displays the highest average temperatures overall. Wind speeds rather curiously drop to an average of 23.1km/h (14.4mph), leading to humid conditions. Weather in August »Weather in September
As the hurricane season approaches its end in September, both rainfall and temperature show a moderate decrease. Wind speeds reduce further, falling to 20.1km/h (12.5mph) on average, the lowest recorded for the year. The daylight hours start to decrease, signaling the decrease in intensity of the summer season. Weather in September »Weather in October
October witnesses a further dip in temperature, coupled with a small decrease in rainfall from 92mm (3.62") to 93mm (3.66"). The wind speed increases marginally, breaking the downtrend observed since June. The cloud cover remains virtually unchanged from September, maintaining an almost balanced distribution of sunshine and cloudiness. Weather in October »Weather in November
With the arrival of November, Castle Bruce continues its descent into cooler weather. A further decrease in rainfall from 93mm (3.66") to 86mm (3.39") and an uptick in wind speed to 21.9km/h (13.6mph) presents a significant shift from the wetter, more stifling months. Weather in November »Weather in December
December indicates the advent of winter, with a significant drop in temperature from November. Rainfall follows suit, diminishing from 86mm (3.39") to 62mm (2.44"). Wind speeds climb upwards, reaching an average of 24.8km/h (15.4mph), the highest value since May. Weather in December »Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January through March, with an average relative humidity of 75%, are the least humid months in Castle Bruce.
In Castle Bruce, Dominica, during the entire year, the rain falls for 249.5 days and collects up to 786mm (30.94") of precipitation.
January through December, with an average maximum UV index of 7, are months with the highest UV index in Castle Bruce, Dominica.
The months with the lowest UV index are January through December, with an average maximum UV index of 7.
Castle Bruce's February weather, with an average high temperature of 26.3°C (79.3°F) and an average low temperature of 24.9°C (76.8°F), tends to be the coldest of the year.
February is the month with the least rainfall in Castle Bruce, Dominica. Rain falls for 17.3 days and accumulates 28mm (1.1") of precipitation.
February is the month with the coldest seawater in Castle Bruce, with an average sea temperature of 26.8°C (80.2°F).
April, August and September, with an average of 10.1h of sunshine, are months with the most sunshine.
June has the longest days of the year, with an average of 13h and 0min of daylight.
The months with the highest humidity are July and August, with an average relative humidity of 78%.
August is the month with the most rainfall. Rain falls for 22.3 days and accumulates 99mm (3.9") of precipitation.
September, with its high-temperature average of 28.9°C (84°F) and a low-temperature average of 27.6°C (81.7°F), is the warmest month in Castle Bruce, Dominica.
With an average sea temperature of 29.4°C (84.9°F), September is the month with the warmest seawater in Castle Bruce, Dominica.
The months with the least sunshine in Castle Bruce, Dominica, are November and December, with an average of 6.5h of sunshine.
December has the shortest days of the year, with an average of 11h and 12min of daylight.
Castle Bruce, Dominica, does not utilize Daylight Saving Time (DST). AST timezone is used throughout the entire year.
Average temperature
Castle Bruce, Dominica
The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is February (26.3°C).
The month with the highest average low temperature is September (27.6°C).
The coldest month (with the lowest average low temperature) is February (24.9°C).
Average pressure
Castle Bruce, Dominica
- Average pressure in January:
1015.6mbar - Average pressure in February:
1015.5mbar - Average pressure in March:
1015.2mbar - Average pressure in April:
1014.9mbar - Average pressure in May:
1015mbar - Average pressure in June:
1015.8mbar
- Average pressure in July:
1015.4mbar - Average pressure in August:
1014.1mbar - Average pressure in September:
1013mbar - Average pressure in October:
1012.2mbar - Average pressure in November:
1012.1mbar - Average pressure in December:
1014.2mbar
The month with the highest atmospheric pressure is June (1015.8mbar).
The month with the lowest atmospheric pressure is November (1012.1mbar).
Average wind speed
Castle Bruce, Dominica
- Average wind speed in January:
26.6km/h - Average wind speed in February:
26.2km/h - Average wind speed in March:
24.3km/h - Average wind speed in April:
24km/h - Average wind speed in May:
24.1km/h - Average wind speed in June:
25.4km/h
- Average wind speed in July:
25.5km/h - Average wind speed in August:
23.1km/h - Average wind speed in September:
20.1km/h - Average wind speed in October:
19.9km/h - Average wind speed in November:
21.9km/h - Average wind speed in December:
24.8km/h
The windiest month (with the highest average wind speed) is January (26.6km/h).
The calmest month (with the lowest average wind speed) is October (19.9km/h).
Average humidity
Castle Bruce, Dominica
The months with the highest relative humidity are July and August (78%).
The months with the lowest relative humidity are January, February and March (75%).
Average rainfall
Castle Bruce, Dominica
The wettest month (with the highest rainfall) is August (99mm).
The driest month (with the least rainfall) is February (28mm).
Average rainfall days
Castle Bruce, Dominica
- Average rainfall days in January:
19.4 days - Average rainfall days in February:
17.3 days - Average rainfall days in March:
16.6 days - Average rainfall days in April:
21.2 days - Average rainfall days in May:
22.3 days - Average rainfall days in June:
18.7 days
- Average rainfall days in July:
22.3 days - Average rainfall days in August:
22.3 days - Average rainfall days in September:
21.5 days - Average rainfall days in October:
23.1 days - Average rainfall days in November:
21.9 days - Average rainfall days in December:
22.9 days
The month with the highest number of rainy days is October (23.1 days).
The month with the least rainy days is March (16.6 days).
Average sea temperature
Castle Bruce, Dominica
The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is February (26.8°C).
Average daylight / Average sunshine
Castle Bruce, Dominica
- Average daylight in January:
11h and 18min - Average daylight in February:
11h and 36min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 30min - Average daylight in May:
12h and 54min - Average daylight in June:
13h and 0min
- Average daylight in July:
12h and 54min - Average daylight in August:
12h and 36min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 48min - Average daylight in November:
11h and 24min - Average daylight in December:
11h and 12min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in January:
7h and 6min - Average sunshine in February:
8h and 54min - Average sunshine in March:
8h and 30min - Average sunshine in April:
10h and 6min - Average sunshine in May:
9h and 42min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
9h and 30min - Average sunshine in August:
10h and 6min - Average sunshine in September:
10h and 6min - Average sunshine in October:
8h and 6min - Average sunshine in November:
6h and 30min - Average sunshine in December:
6h and 30min
The months with the most sunshine are April, August and September (Average sunshine: 10h and 6min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days
Castle Bruce, Dominica
- Average sunshine days in January:
6.7 days - Average sunshine days in February:
6.5 days - Average sunshine days in March:
8.1 days - Average sunshine days in April:
4.7 days - Average sunshine days in May:
3.8 days - Average sunshine days in June:
3.8 days
- Average sunshine days in July:
3.9 days - Average sunshine days in August:
3.8 days - Average sunshine days in September:
5.7 days - Average sunshine days in October:
5.6 days - Average sunshine days in November:
4.8 days - Average sunshine days in December:
5 days
The month with the most sunshine days is March (8.1 days).
The months with the least sunshine days are May, June and August (3.8 days).
Average UV index
Castle Bruce, Dominica
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Castle Bruce, Dominica
The months with the most cloud cover are June and July (Cloud cover 47).
The month with the least cloud cover is February (Cloud cover 34).
Average visibility
Castle Bruce, Dominica
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
