Do you need to know, when is the best time to go to Saint Vincent and the Grenadines? Then you should take a look here, what weather you can expect there during the year.
The climate of Saint Vincent and the Grenadines is tropical. You can usually expect warm and sunny weather with only little seasonal variation of temperature. Rainy season is from May to November.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Bequia, Grenadines, Kingstown, Saint Vincent, Union Island.
Let's look now what weather you can expect in the area around the capital and in many other cities. The warmest month here is September, the average maximum temperature is 31.7 ℃ (89.06 ℉). The average minimum temperature in this month is 24.9 ℃ (76.82 ℉). The coldest month here is February, the average maximum temperature is 28.3 ℃ (82.94 ℉). The average minimum temperature in this month is 23.7 ℃ (74.66 ℉). The most rainy month here is July, the average number of rainy days is 21.1. The least rainy month here is April, the average number of rainy days is 12.3. 
When travelling to some places in Saint Vincent and the Grenadines, always consider the altitude of the the place as well. The highest point here is La Soufriere (1234 m) and the lowest point is Caribbean Sea (0 m). So the differences in altitudes in this country are not negligible and you should expect the weather to be different in places in different altitudes. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Saint Vincent and the Grenadines in January is this: The average highest temperature in Saint Vincent and the Grenadines in January is 28.4 ℃ (83.12 ℉). The average lowest temperature is 24.1 ℃ (75.38 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 28.85 ℃ (83.93 ℉). At the end of January you can expect lower temperatures, the average highest temperature is around 28.35 ℃ (83.03 ℉). The average number of rainy days in January is 17.9. The average rainfall is 71.1 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:19 (hours and minutes), in the middle of the month 11:24 and at the end of the month 11:31.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in February is this: The average highest temperature in Saint Vincent and the Grenadines in February is 28.3 ℃ (82.94 ℉). The average lowest temperature is 23.7 ℃ (74.66 ℉). At the beginning of February you can expect higher temperatures, the average highest temperature is around 28.35 ℃ (83.03 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 29.15 ℃ (84.47 ℉). The average number of rainy days in February is 14.9. The average rainfall is 50.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:31 (hours and minutes), in the middle of the month 11:41 and at the end of the month 11:52.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in March is this: The average highest temperature in Saint Vincent and the Grenadines in March is 30 ℃ (86 ℉). The average lowest temperature is 24.2 ℃ (75.56 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 29.15 ℃ (84.47 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). The average number of rainy days in March is 14.3. The average rainfall is 58.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:52 (hours and minutes), in the middle of the month 12:03 and at the end of the month 12:15.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in April is this: The average highest temperature in Saint Vincent and the Grenadines in April is 30.4 ℃ (86.72 ℉). The average lowest temperature is 24.1 ℃ (75.38 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). The average number of rainy days in April is 12.3. The average rainfall is 60.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:15 (hours and minutes), in the middle of the month 12:26 and at the end of the month 12:36.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in May is this: The average highest temperature in Saint Vincent and the Grenadines in May is 31 ℃ (87.8 ℉). The average lowest temperature is 25.7 ℃ (78.26 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 30.7 ℃ (87.26 ℉). At the end of May you can expect lower temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). The average number of rainy days in May is 13.8. The average rainfall is 69.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:36 (hours and minutes), in the middle of the month 12:45 and at the end of the month 12:52.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in June is this: The average highest temperature in Saint Vincent and the Grenadines in June is 31 ℃ (87.8 ℉). The average lowest temperature is 25.6 ℃ (78.08 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 31.1 ℃ (87.98 ℉). The average number of rainy days in June is 16.3. The average rainfall is 98.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:52 (hours and minutes), in the middle of the month 12:55 and at the end of the month 12:55.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in July is this: The average highest temperature in Saint Vincent and the Grenadines in July is 31.2 ℃ (88.16 ℉). The average lowest temperature is 25.3 ℃ (77.54 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 31.1 ℃ (87.98 ℉). At the end of July you can expect lower temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). The average number of rainy days in July is 21.1. The average rainfall is 151.2 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:55 (hours and minutes), in the middle of the month 12:51 and at the end of the month 12:45.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in August is this: The average highest temperature in Saint Vincent and the Grenadines in August is 30.8 ℃ (87.44 ℉). The average lowest temperature is 25.8 ℃ (78.44 ℉). At the beginning of August you can expect higher temperatures, the average highest temperature is around 31 ℃ (87.8 ℉). At the end of August you can expect higher temperatures, the average highest temperature is around 31.25 ℃ (88.25 ℉). The average number of rainy days in August is 20.6. The average rainfall is 155.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:45 (hours and minutes), in the middle of the month 12:36 and at the end of the month 12:26.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in September is this: The average highest temperature in Saint Vincent and the Grenadines in September is 31.7 ℃ (89.06 ℉). The average lowest temperature is 24.9 ℃ (76.82 ℉). At the beginning of September you can expect lower temperatures, the average highest temperature is around 31.25 ℃ (88.25 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). The average number of rainy days in September is 20.1. The average rainfall is 193.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:26 (hours and minutes), in the middle of the month 12:14 and at the end of the month 12:03.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in October is this: The average highest temperature in Saint Vincent and the Grenadines in October is 30.6 ℃ (87.08 ℉). The average lowest temperature is 24.8 ℃ (76.64 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 31.15 ℃ (88.07 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). The average number of rainy days in October is 20.3. The average rainfall is 195.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:03 (hours and minutes), in the middle of the month 11:52 and at the end of the month 11:41.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in November is this: The average highest temperature in Saint Vincent and the Grenadines in November is 29.8 ℃ (85.64 ℉). The average lowest temperature is 24.6 ℃ (76.28 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 30.2 ℃ (86.36 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 29.55 ℃ (85.19 ℉). The average number of rainy days in November is 20.3. The average rainfall is 178.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:41 (hours and minutes), in the middle of the month 11:31 and at the end of the month 11:24.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Saint Vincent and the Grenadines in December is this: The average highest temperature in Saint Vincent and the Grenadines in December is 29.3 ℃ (84.74 ℉). The average lowest temperature is 23.6 ℃ (74.48 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 29.55 ℃ (85.19 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 28.85 ℃ (83.93 ℉). The average number of rainy days in December is 17. The average rainfall is 107.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:24 (hours and minutes), in the middle of the month 11:19 and at the end of the month 11:19.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.