Climate and monthly weather forecastGrand Roy, Grenada
Climate and monthly weather forecast
The climate of Grand Roy
Grand Roy, a picturesque hamlet nestled in Grenada, boasts a tropical wet and dry climate, officially classified as 'Aw' under the Köppen climate classification. The temperatures here stay relatively consistent throughout the year, earning Grand Roy its tropical reputation. Monthly average high temperatures range from 26.7°C (80.1°F) in February to 28.8°C (83.8°F) in September. Similarly, the average low temperatures vary from 25.8°C (78.4°F) in February to 28.1°C (82.6°F) in September, maintaining a comforting warmth even at the coldest hours.Constant throughout the year in this enclave is a relatively high humidity, fluctuating between 76% in February to 79% from May to July. The consistently high humidity can make the air feel warmer than it actually is, which is a characteristic of tropical climates. Besides, in this coastal community, visitors can expect rainfall throughout the year. However, there is an evident increase in precipitation from June to November with rainfall measurements soaring up to 110mm (4.33") in October while the dry months like March sees merely 30mm (1.18") of rainfall.
Winds in Grand Roy maintain a steady pace throughout the year, with average speeds hovering between 21.5km/h (13.4mph) in September to 29.4km/h (18.3mph) in February. However, gusts can reach up to 40.8km/h (25.4mph) in February, contributing to cooler conditions despite the generally high temperatures. Grand Roy experiences sunshine for approximately 67% to 87% of daylight hours, a delightful prospect for sun seekers. Remarkably, although November and December receive relatively lesser sunshine hours, the UV Index remains constant at 7 across all months, ensuring a strong sun year-round.
The best time to visit Grand Roy
Affectionately known as the Island of Spice, the best time to visit Grand Roy for warm, dry weather is from December through April. During these months, the island experiences low rainfall, reliably warm temperatures, and generous sunshine. With only 25mm (0.98") of rainfall in April and daylight extending up to 12.4 hours, tourists can relish outdoor activities and explore the island's wonders. Contrarily, if tourists do not mind a bit of rain, May and November also make for an attractive option with temperatures peaking at 27.9°C (82.2°F) and 27.6°C (81.7°F) respectively providing the perfect backdrop for a plunge in the Caribbean Sea.The worst time to visit Grand Roy
Visiting Grand Roy from June to November might prove challenging as these months witness the highest rainfall, peaking in October with 110mm (4.33"), coinciding with the Atlantic hurricane season. The relatively high rainfall can often result in temporary closures of attractions and interrupt outdoor activities, making it less ideal for tourism.Spring weather in Grand Roy
Spring arrives in a blaze of glory in Grand Roy from March to May. The daily temperatures oscillate between 26.5°C (79.7°F) to 27.1°C (80.8°F), while rainfall stays moderately low compared to the rest of the year, averaging around 30mm (1.18"). A notably pleasing aspect of spring in Grand Roy is the increase in daylight hours and sunshine. May sees daylight extending to a pleasant 12.7 hours, complementing the 10.1 hours of sunshine.Summer weather in Grand Roy
Summer months from June to August in Grand Roy bring increased rainfall and marginally higher temperatures. The temperature range narrows down to between 27.3°C (81.1°F) to 28.2°C (82.8°F), providing continual warmth. Despite rainfall peaking at 88mm (3.46") in July, the weather is balanced by the abundance of sunshine lasting up to 10.6 hours per day in August, ensuring persistent clear and bright skies.Autumn weather in Grand Roy
The transition from summer to autumn sees some of the highest temperatures in Grand Roy with September hosting an average high of 28.8°C (83.8°F). Along with bright sunlit days, autumn also brings the highest rainfall. Rainfall in these months of September to November accumulates to around 95mm (3.74") per month on average. Even though sunshine hours dip to 6.4 hours per day in November, the daylight approximately stays constant from 12.2 to 11.6 hours.Winter weather in Grand Roy
In the winter months of December and February, Grand Roy experiences mild temperatures with averages ranging from 26.7°C (80.1°F) to 27.7°C (81.9°F) making it an attractive winter getaway. In line with the other steady factors, rainfall drops significantly to 55mm (2.17") in December and even lower to 28mm (1.1") in February, offering drier conditions. Meanwhile, despite shorter daylight hours of 11.5 to 11.8 hours, sunshine persists for 6.3 to 7.9 hours, brightening up winter days. Consequently, the winter season remains appealing to visitors seeking to escape colder climates.Weather in January
January ushers in the new year with weather that's relatively cooler in Grand Roy, Grenada compared to the later months. January has a slightly higher humidity of 77% and fewer sunshine hours, giving residents a respite before the mercury begins its gradual climb in the following months. Weather in January »Weather in February
February continues with the trend seen in January, but the temperatures begin to rise slowly as spring is now round the corner. The shifting season will experience marginally increased daylight duration, proof of the approaching warmer months. Weather in February »Weather in March
The weather in March witnesses relatively high temperatures amidst a gradually transforming scenario from winter to spring. Though the rainfall increases to 30mm (1.18"), it is still below the yearly average amount of precipitation. Weather in March »Weather in April
April brings with it weather that is typical of the spring season in Grand Roy, Grenada. The rainfall diminishes even further, despite the rise in relative humidity, resulting in a peculiar arid atmosphere. The number of sunshine hours reaches its peak in April which contributes to long and warm days. Weather in April »Weather in May
With May, begins the pre-summer warm-up in the weather of Grand Roy, Grenada. The heat level increases steadily, enhanced by the longer sunshine hours contributing to a warm and vibrant ambiance. May experiences an escalation in relative humidity, and the length of daylight hours extends further. Weather in May »Weather in June
June marks the trend of high summer temperatures in Grand Roy, Grenada, a season the residents prepare for in advance. Increases are evident in several parameters- the UV index, number of sunshine days, as well as the daylight duration. Weather in June »Weather in July
The weather in July maintains the pattern set by June with slight variations. The visual scene is a compelling blend of blue skies and impending rain clouds. University of Grand Roy, Grenada hits the highest value for the year in July, making it a month governed by higher solar radiation. Weather in July »Weather in August
August continues on July's path with temperatures and other parameters remaining fairly constant. The intermittent rainy clouds slightly obscure the abundant sunshine. Despite it being the peak of summer, the weather remains quite hospitable due to the soothing breezes. Weather in August »Weather in September
September serves as a transition month in Grand Roy, Grenada as the summer fades into fall. The longer hours of sunshine from August carry over into September, contributing to lengthy days of warm weather. The weather is generally good with modest rainfall, making this month's outdoor activities quite pleasant. Weather in September »Weather in October
As October dawns, the evening chill begins to replace the warm summer air. Growth of cloud cover signifies a decrease in hours of sunshine. The rainfall further increases to 110mm (4.33"), making for abundant vegetation and scenic beauty. Weather in October »Weather in November
November brings a perceptible change in weather, as the days become shorter and the temperatures start declining. Though the drop in temperature is gradual, it’s easily noticeable after the sweltering months of summer and early fall. Weather in November »Weather in December
December ends the year with a discernible drop in temperature and ebbing daylight hours. As in November, the trend of higher rainfall continues throughout this month with a precipitation level at 55mm (2.17"). The UV index, temperature, and cloud cover remain constant, indicative of the stable winter conditions setting in. Weather in December »Updated: Feb 9, 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
Throughout the year, in Grand Roy, there are 232 rainfall days, and 739mm (29.09") of precipitation is accumulated.
January through December, with an average maximum UV index of 7, are months with the highest UV index in Grand Roy.
The months with the lowest UV index in Grand Roy are January through December, with an average maximum UV index of 7.
The coldest period is February, when temperatures fluctuate between an average high of 26.7°C (80.1°F) and a low of 25.8°C (78.4°F).
February and September, with an average relative humidity of 76%, are the least humid months.
The month with the least rainfall is April, when the rain falls for 14.8 days and typically collects 25mm (0.98") of precipitation.
The months with the highest humidity are May through July, with an average relative humidity of 79%.
With an average of 12h and 48min of daylight, June has the longest days of the year in Grand Roy, Grenada.
The months with the most sunshine are August and September, with an average of 10.6h of sunshine.
September and October, with an average high-temperature of 28.8°C (83.8°F), are marked as the warmest months in Grand Roy.
The month with the most rainfall in Grand Roy, Grenada, is October, when the rain falls for 20.7 days and typically aggregates up to 110mm (4.33") of precipitation.
The month with the shortest days is December, with an average of 11h and 24min of daylight.
Grand Roy, Grenada, does not observe Daylight Saving Time (DST). AST timezone is used over the entire year.
With an average of 6.3h of sunshine, December has the least sunshine of the year in Grand Roy.
Average temperature
Grand Roy, Grenada
The warmest months (with the highest average high temperature) are September and October (28.8°C).
The month with the lowest average high temperature is February (26.7°C).
The month with the highest average low temperature is September (28.1°C).
The coldest month (with the lowest average low temperature) is February (25.8°C).
Average pressure
Grand Roy, Grenada
- Average pressure in January:
1013.9mbar - Average pressure in February:
1013.9mbar - Average pressure in March:
1013.7mbar - Average pressure in April:
1013.3mbar - Average pressure in May:
1013.5mbar - Average pressure in June:
1014.2mbar
- Average pressure in July:
1013.9mbar - Average pressure in August:
1012.9mbar - Average pressure in September:
1012mbar - Average pressure in October:
1011.1mbar - Average pressure in November:
1010.7mbar - Average pressure in December:
1012.7mbar
The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed
Grand Roy, Grenada
- Average wind speed in January:
28.8km/h - Average wind speed in February:
29.4km/h - Average wind speed in March:
27.6km/h - Average wind speed in April:
27km/h - Average wind speed in May:
27.7km/h - Average wind speed in June:
28.2km/h
- Average wind speed in July:
25.8km/h - Average wind speed in August:
22.4km/h - Average wind speed in September:
21.5km/h - Average wind speed in October:
23.3km/h - Average wind speed in November:
25.1km/h - Average wind speed in December:
28.2km/h
The windiest month (with the highest average wind speed) is February (29.4km/h).
The calmest month (with the lowest average wind speed) is September (21.5km/h).
Average humidity
Grand Roy, Grenada
The months with the highest relative humidity are May, June and July (79%).
The months with the lowest relative humidity are February and September (76%).
Average rainfall
Grand Roy, Grenada
The wettest month (with the highest rainfall) is October (110mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days
Grand Roy, Grenada
- Average rainfall days in January:
21 days - Average rainfall days in February:
17 days - Average rainfall days in March:
15.8 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
18.3 days
- Average rainfall days in July:
22.3 days - Average rainfall days in August:
22.3 days - Average rainfall days in September:
20.4 days - Average rainfall days in October:
20.7 days - Average rainfall days in November:
21.5 days - Average rainfall days in December:
21.7 days
The months with the highest number of rainy days are July and August (22.3 days).
The month with the least rainy days is April (14.8 days).
Average daylight / Average sunshine
Grand Roy, Grenada
- Average daylight in January:
11h and 30min - Average daylight in February:
11h and 48min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 24min - Average daylight in May:
12h and 42min - Average daylight in June:
12h and 48min
- Average daylight in July:
12h and 48min - Average daylight in August:
12h and 30min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 54min - Average daylight in November:
11h and 36min - Average daylight in December:
11h and 24min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in January:
7h and 54min - Average sunshine in February:
8h and 42min - Average sunshine in March:
8h and 30min - Average sunshine in April:
9h and 42min - Average sunshine in May:
10h and 6min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 36min - Average sunshine in September:
10h and 36min - Average sunshine in October:
8h and 24min - Average sunshine in November:
6h and 24min - Average sunshine in December:
6h and 18min
The months with the most sunshine are August and September (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days
Grand Roy, Grenada
- Average sunshine days in January:
5.3 days - Average sunshine days in February:
6.3 days - Average sunshine days in March:
8.8 days - Average sunshine days in April:
9.2 days - Average sunshine days in May:
8.7 days - Average sunshine days in June:
6.4 days
- Average sunshine days in July:
4.6 days - Average sunshine days in August:
6 days - Average sunshine days in September:
7.5 days - Average sunshine days in October:
9.2 days - Average sunshine days in November:
6.9 days - Average sunshine days in December:
5.6 days
The months with the most sunshine days are April and October (9.2 days).
The month with the least sunshine days is July (4.6 days).
Average UV index
Grand Roy, Grenada
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
Grand Roy, Grenada
The month with the most cloud cover is November (Cloud cover 43).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility
Grand Roy, Grenada
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).
