Climate and monthly weather forecastGrande Riviere, Saint Lucia
Grande Riviere, Saint Lucia - Climate and weather forecast by month. Detailed climate information with charts - average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. Winter months in Grande Riviere - December to February, experience a significant reduction in rainfall, between 26mm (1.02") and 35mm (1.38"). Visitors who prefer a combination of warmth, abundant sunlight, and comparatively less rainfall may consider the period from February to May as the optimal time to visit Grande Riviere.
Climate and monthly weather forecast
The climate of Grande Riviere
Grande Riviere is characterized by a Köppen climate classification of Af, indicative of a tropical rainforest climate. Its geographical location, in the heart of Saint Lucia, contributes to the consistent weather profile experienced throughout the year. The uniformity of climatic conditions can be traced back to its near-equator location, which leads to a relative lack of temperature and daylight fluctuations.With average high temperatures fluctuating slightly between 27.5°C (81.5°F) and 30.3°C (86.5°F), and average lows resting between 25°C (77°F) and 27.2°C (81°F), Grande Riviere reveals a climate consistently on the warmer side. Humidity levels follow suit and remain relatively steady from 73% to 75% year-round, which is typical for a tropical environment. The average rainfall varies noticeably from 19mm (0.75") in February to 82mm (3.23") in August, displaying significant seasonal variations. Similarly, there are noticeable seasonal changes in sunshine durations, ranging from 6.4 hours in December to 9.8 hours in April.
Unique weather patterns arise with respect to rainfall and winds. A significant increase in rainfall is noticed from June to September, with August seeing the highest rainfall of 82mm (3.23"). On the other hand, wind ranges from approximately 16.7km/h (10.4mph) in September to 24.7km/h (15.3mph) in February, with gusts reaching a peak of 33.4km/h (20.8mph) in February.
The best time to visit Grande Riviere
Visitors who prefer a combination of warmth, abundant sunlight, and comparatively less rainfall may consider the period from February to May as the optimal time to visit Grande Riviere. During this window, average high temperatures range from 27.5°C (81.5°F) to 28.8°C (83.8°F), rainfall is between 19mm (0.75") and 36mm (1.42"), and the average sunshine duration extends from 8.3 hours to 9.8 hours.The worst time to visit Grande Riviere
The period from June to September is the least favorable for a visit to Grande Riviere. This time frame is associated with a rise in rainfall, measuring between 43mm (1.69") to 82mm (3.23") alongside reduced hours of sunshine, ranging from 9.3 hours to 9.2 hours. Moreover, the average high temperature during these months elevates to approximately 29.4°C (84.9°F) to 30.3°C (86.5°F), coupled with increased humidity levels.Spring weather in Grande Riviere
In Grande Riviere, the spring season (March to May) witnesses temperatures ranging from 27.7°C (81.9°F) to 28.8°C (83.8°F) for highs and 25°C (77°F) to 26.5°C (79.7°F) for lows. During the spring months of March to May, rainfall varies from 21mm (0.83") to 36mm (1.42"). Sunshine duration exhibits a discernible increase with 8.3 hours rising to 9.8 hours, while wind speed progressively drops from 22.7km/h (14.1mph) to 22.3km/h (13.9mph).Summer weather in Grande Riviere
Summer in Grande Riviere (June to August) is distinguished by a noticeable enhancement in rainfall, recording between 43mm (1.69") and 82mm (3.23"), which coincides with an escalation in average high temperatures from 29.3°C (84.7°F) to 29.8°C (85.6°F). Sunshine hours decrease slightly in this season, from 9.2 hours to 9.7 hours, while high humidity levels around 75% persist throughout the summer.Autumn weather in Grande Riviere
From September to November, the autumn period in Grande Riviere is characterized by a descending trend in temperatures, with average highs wavering from 30.3°C (86.5°F) to 29.2°C (84.6°F) and lows varying from 27°C (80.6°F) to 26.6°C (79.9°F). Rainfall ranges from 63mm (2.48") to 64mm (2.52"), and average sunshine duration reduces from 9.6 hours to 6.5 hours.Winter weather in Grande Riviere
Winter months in Grande Riviere - December to February, experience a significant reduction in rainfall, between 26mm (1.02") and 35mm (1.38"). Average high and low temperatures tend to decrease, ranging from 28.2°C (82.8°F) to 27.5°C (81.5°F) and 25.7°C (78.3°F) to 25.1°C (77.2°F) respectively. Sunshine hours decline gradually to a minimum of 6.4 hours in December, but start to rise again up to 7 hours by February. Wind speeds also peak during the winter months, averaging between 22.5km/h (14mph) to 24.7km/h (15.3mph).Weather in January
In Grande Riviere, January weather shows relative consistency in precipitation and temperature with slight variations. Predominantly, the city experiences mild climate conditions, having temperatures range from 25.1°C (77.2°F) to 27.5°C (81.5°F). Weather in January »Weather in February
As Grande Riviere transitions from January to February, hardly any drastic weather changes occur. February mirrors its predecessor month with a temperature range from 25.1°C (77.2°F) to 27.5°C (81.5°F), making it a lukewarm period. Weather in February »Weather in March
With the arrival of March, Grande Riviere witnesses a relatively amicable weather shift. The temperature slightly raises from 25°C (77°F) to 27.7°C (81.9°F), indicating the advance towards warmer months. Apparently, the city has a soaring humidity percentage, which might escalate the feel of heat but it is usually moderated by breeze. Weather in March »Weather in April
April unfolds a modest increment in temperature in Grande Riviere, treading lightly into a warmer terrain. With temperature elevating from 25.5°C (77.9°F) to 28.3°C (82.9°F), this increment translates into a subtle lift of mercury levels. Weather in April »Weather in May
In Grande Riviere, May brings a discernible inclination towards a warmer spectrum. Going from 26.5°C (79.7°F) to 28.8°C (83.8°F), the daytime temperature begins to feel slightly intense under the sun-soaked sky. Despite the mount in mercury level, wind speed subtly counters the heat, making the atmosphere bearable for residents. Weather in May »Weather in June
June in Grande Riviere is characterized by an upsurge in temperature leading the city towards a seasonal high. As temperatures move from 26.8°C (80.2°F) to 29.3°C (84.7°F), people start seeking shade and hydration to beat the heat. Weather in June »Weather in July
July extends the trend of high temperatures in Grande Riviere, signifying the dominance of summer. This month sets a benchmark with its temperature rising between 26.8°C (80.2°F) to 29.4°C (84.9°F). Despite the mounting heat, the city keeps its charm intact with steady wind flow making summer more tolerable. Weather in July »Weather in August
August in Grande Riviere is at the height of the summer season with temperatures ticking up to 29.8°C (85.6°F) from 26.9°C (80.4°F). It's the warmest month the city witnesses, making it imperative for residents and tourists to stay hydrated and protected against the sunrays. Weather in August »Weather in September
As the city steps into September, Grande Riviere commences its gradual transition from the hot summer days to the cooler autumnal ambiance. Recordings show a slightly cooler trend with temperatures decreasing from 30.3°C (86.5°F) to 29.8°C (85.6°F). Weather in September »Weather in October
October in Grande Riviere, Saint Lucia, marks further reduction in temperature and transition towards the cooler spectrum of the year. There's a perceptible shift in climate as temperatures recede from 29.2°C (84.6°F) to 28.2°C (82.8°F) through October to November. Weather in October »Weather in November
The month of November brings Grande Riviere into the heart of the cooler season. The transition is marked by temperatures dropping down between 26.6°C (79.9°F) to 28.2°C (82.8°F). Amidst the lower temperatures, this month manages to remain sunny during the daylight hours, thus the weather conditions are delightful for outdoor activities. Weather in November »Weather in December
By December, Grande Riviere's weather embodies the essence of the cooler season, displaying decreased temperatures that range from 25.7°C (78.3°F) to 28.2°C (82.8°F). With the weather turning slightly cooler, it invites everyone to enjoy the outdoors without the scorching heat. Weather in December »Updated: Jan 31, 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
During January and February, Grande Riviere experiences its coldest period, with an average high-temperature of 27.5°C (81.5°F).
January through March and September, with an average relative humidity of 73%, are the least humid months.
In Grande Riviere, during the entire year, the rain falls for 255.2 days and collects up to 560mm (22.05") of precipitation.
The months with the highest UV index in Grande Riviere, Saint Lucia, are January through May, July through December, with an average maximum UV index of 7.
February is the month with the least rainfall in Grande Riviere. Rain falls for 16.4 days and accumulates 19mm (0.75") of precipitation.
April has the most sunshine of the year, with an average of 9.8h of sunshine.
May through August and November, with an average relative humidity of 75%, are most humid months.
June has the longest days of the year, with an average of 12h and 54min of daylight.
The month with the lowest UV index is June, with an average maximum UV index of 6.
August is the month with the most rainfall in Grande Riviere, Saint Lucia. Rain falls for 25.9 days and accumulates 82mm (3.23") of precipitation.
The warmest period tends to be September, when average temperatures fluctuate between a high of 30.3°C (86.5°F) and a low of 27°C (80.6°F).
With an average of 11h and 18min of daylight, December has the shortest days of the year in Grande Riviere.
Grande Riviere, Saint Lucia, does not observe Daylight Saving Time (DST). AST timezone is used over the entire year.
The month with the least sunshine in Grande Riviere, Saint Lucia, is December, with an average of 6.4h of sunshine.
Average temperature
Grande Riviere, Saint Lucia
The warmest month (with the highest average high temperature) is September (30.3°C).
The months with the lowest average high temperature are January and February (27.5°C).
The month with the highest average low temperature is October (27.2°C).
The coldest month (with the lowest average low temperature) is March (25°C).
Average pressure
Grande Riviere, Saint Lucia
- Average pressure in January:
1014.6mbar - Average pressure in February:
1014.6mbar - Average pressure in March:
1014.5mbar - Average pressure in April:
1014.1mbar - Average pressure in May:
1014.3mbar - Average pressure in June:
1015mbar
- Average pressure in July:
1014.7mbar - Average pressure in August:
1013.5mbar - Average pressure in September:
1012.6mbar - Average pressure in October:
1011.7mbar - Average pressure in November:
1011.4mbar - Average pressure in December:
1013.4mbar
The month with the highest atmospheric pressure is June (1015mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).
Average wind speed
Grande Riviere, Saint Lucia
- Average wind speed in January:
24.5km/h - Average wind speed in February:
24.7km/h - Average wind speed in March:
22.7km/h - Average wind speed in April:
21.8km/h - Average wind speed in May:
22.3km/h - Average wind speed in June:
24.3km/h
- Average wind speed in July:
23.5km/h - Average wind speed in August:
19.9km/h - Average wind speed in September:
16.7km/h - Average wind speed in October:
18km/h - Average wind speed in November:
19.7km/h - Average wind speed in December:
22.5km/h
The windiest month (with the highest average wind speed) is February (24.7km/h).
The calmest month (with the lowest average wind speed) is September (16.7km/h).
Average humidity
Grande Riviere, Saint Lucia
The months with the highest relative humidity are May, June, July, August and November (75%).
The months with the lowest relative humidity are January, February, March and September (73%).
Average rainfall
Grande Riviere, Saint Lucia
The wettest month (with the highest rainfall) is August (82mm).
The driest month (with the least rainfall) is February (19mm).
Average rainfall days
Grande Riviere, Saint Lucia
- Average rainfall days in January:
19.2 days - Average rainfall days in February:
16.4 days - Average rainfall days in March:
18.8 days - Average rainfall days in April:
20.3 days - Average rainfall days in May:
22.9 days - Average rainfall days in June:
23.8 days
- Average rainfall days in July:
26.5 days - Average rainfall days in August:
25.9 days - Average rainfall days in September:
20.3 days - Average rainfall days in October:
21 days - Average rainfall days in November:
21 days - Average rainfall days in December:
19.1 days
The month with the highest number of rainy days is July (26.5 days).
The month with the least rainy days is February (16.4 days).
Average daylight / Average sunshine
Grande Riviere, Saint Lucia
- Average daylight in January:
11h and 24min - Average daylight in February:
11h and 42min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 30min - Average daylight in May:
12h and 48min - Average daylight in June:
12h and 54min
- 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 30min - Average daylight in December:
11h and 18min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
8h and 30min - Average sunshine in March:
8h and 18min - Average sunshine in April:
9h and 48min - Average sunshine in May:
9h and 30min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
9h and 18min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 36min - Average sunshine in October:
8h and 6min - Average sunshine in November:
6h and 30min - Average sunshine in December:
6h and 24min
The month with the most sunshine is April (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days
Grande Riviere, Saint Lucia
- Average sunshine days in January:
7.8 days - Average sunshine days in February:
7.1 days - Average sunshine days in March:
7.4 days - Average sunshine days in April:
5.1 days - Average sunshine days in May:
2.8 days - Average sunshine days in June:
1.5 days
- Average sunshine days in July:
0.8 days - Average sunshine days in August:
1.3 days - Average sunshine days in September:
5.2 days - Average sunshine days in October:
5.5 days - Average sunshine days in November:
4.4 days - Average sunshine days in December:
7.3 days
The month with the most sunshine days is January (7.8 days).
The month with the least sunshine days is July (0.8 days).
Average UV index
Grande Riviere, Saint Lucia
The months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is June (UV index 6).
Average cloud cover
Grande Riviere, Saint Lucia
The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is February (Cloud cover 38).
Average visibility
Grande Riviere, Saint Lucia
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).
