St. Vincent and the Grenadines has a tropical climate, with hot, humid conditions year-round. Historically, the dry season has been from December to May and the rainy season from June to November. However, there has been noticeable changes in this pattern over the past ten years- the rainy season now lasts from May to October. The country is impacted by tropical cyclones and hurricanes, as well as the impacts of the El Nino Southern Oscillation. El Nino brings warmer and drier than average conditions between June and August, while La Nina brings colder and wetter conditions during this same time period. Key historical climate trends are summarized below:
- Mean annual temperature has increased by 0.7°C since 1960, at an average rate of 0.16°C per decade, and this warming has affected all seasons at a similar rate.
- Average precipitation has declined by about 8.2 mm per month (-5.7%) per decade over the period 1960-2006. This decline affects all seasons, but is most marked in the wettest seasons during June through November, when the average rate of decline had been 10.6 to 13.5 mm per month (4.9% to 7.1%) per decade.
This section provides the options to visualize historical climate data for different timeframes via map and annual cycle chart.