Climate and monthly weather forecastWaterloo, Saint Vincent and the Grenadines

The climate of Waterloo

Located on the island of Saint Vincent and the Grenadines, Waterloo falls under the Af Köppen climate classification, known for its characteristic tropical rainforest climate. The city features consistently high temperatures, high humidity, and substantial rainfall throughout the year, along with minimal temperature fluctuations from month to month.

During the course of the year, the temperature rarely deviates from a warming cycle with highs from 26.3°C (79.3°F) to 28.7°C (83.7°F), and lows from 25.3°C (77.5°F) to 27.9°C (82.2°F). This shows a comparably minor change in the diurnal temperature difference. Furthermore, the area experiences a high level of humidity, with relative humidity staying at 75% to 78%, retaining a fairly moist environment all year round.

Being in the tropics, Waterloo experiences generous rainfall. Starting from 12mm (0.47") in February, rainfall escalates progressively throughout the year, climaxing at around 40mm (1.57") in November. This rate of precipitation is paired with an increasing number of rainfall days, with the most notable increase seen from 8.7 days in February to 16.4 days in July.

The extent of daylight ranges from 11.4 hours in December to 12.9 hours in June. Correspondingly, the number of sunshine hours varies between 6.6 hours in December and 10.5 hours in August. However, the percentage of cloud cover is relatively constant throughout the year, fluctuating between 35% and 44%.

The best time to visit Waterloo

Given the constant warm temperatures and high humidity, the optimum time for a visit to Waterloo would predominantly hinge on the individual's tolerance for rainfall. Months of February and March show the lowest precipitation levels at 12mm (0.47") and 14mm (0.55") respectively, coupled with a lesser number of rainy days, making them the most appealing months for travel, especially for outdoor activities. During these months, visitors can also expect longer periods of sunlight, with an average of 11.7 hours and 12.1 hours of daylight respectively.

The worst time to visit Waterloo

Conversely, the months with the highest levels of rainfall are November and October, with precipitation figures hitting as high as 40mm (1.57") and 37mm (1.46"). Correspondingly, these months record the highest number of rainfall days at 15.5 and 16 respectively, indicating a higher probability of encountering rain. It might make outdoor activities less enjoyable, therefore it would not necessarily be the best period to visit Waterloo.

Spring weather in Waterloo

With spring arriving in Waterloo, March welcomes 10.6 rainfall days on average, and rainfall volume of 14mm (0.55"). These conditions progress in April and May with more rainfall days and volume, counting 12.4 and 14.4 days alongside 17mm (0.67") and 18mm (0.71") of precipitations. The temperatures retain their consistency with highs steeping from 26.5°C (79.7°F) in March to 27.8°C (82°F) in May, and lows step up from 25.4°C (77.7°F) to 26.9°C (80.4°F). Despite the increase in precipitation, this season offers a decent number of sunshine hours, standing at 8.7 hours in March, and escalating to 10.1 hours by May.

Summer weather in Waterloo

The summer in Waterloo sees the highest temperatures, with the mercury soaring from 28.1°C (82.6°F) in June to a notable 28.7°C (83.7°F) in August. Corresponding low temperatures also mark their peak, going from 27°C (80.6°F) to 27.9°C (82.2°F) in the same period. The rainfall days and volume both increase substantially during these months, with July recording the highest at 16.4 days and 30mm (1.18"), before tapering down again in August to 16.3 days and 33mm (1.3"). Sunshine hours remain high, hitting a peak of 10.5 hours in August.

Autumn weather in Waterloo

Across September, October, and November, Waterloo experiences a dip in temperature highs from 28.7°C (83.7°F) to 27.9°C (82.2°F), while lows decline slightly from 27.9°C (82.2°F) to 27.2°C (81°F). Rainfall volume peaks during this time, culminating at 40mm (1.57") in November, with an associated rise in rainy days to 15.5. This season also indicates a downturn in the number of sunshine hours, reducing to 6.7 hours by November.

Winter weather in Waterloo

Winter months in Waterloo are characterized by a mild decrease in average high temperatures, shrinking from 28.6°C (83.5°F) in December to 27.4°C (81.3°F) in February, along with low temperatures moving from 27.7°C (81.9°F) to 25.3°C (77.5°F) correspondingly. The rainfall dips progressively throughout these months, hitting a record low of 12mm (0.47") in February, and rainy days decrease to 8.7. The winter months also witness the shortest periods of daylight, flooring at 11.4 hours in both December and February, while sunshine hours are the lowest of the year in December with 6.6 hours on average.

Weather in January

January in Waterloo, Saint Vincent and the Grenadines, presents momentarily reprieve from December’s showers, with rainfall figures dropping to 16mm (0.63") over 11.7 days. A comforting combination of moderate temperatures, precipitation and cloud cover characterizes the local weather. Weather in January »

Weather in February

Moving into February, the weather still carries warmth left by January. With the sun shining over 15.3 days and an average of 8.8 sunshine hours per day, February touts a slightly longer and brighter daylight period. However, maintaining a stable weather pattern, the city experiences 12mm (0.47") rainfall spread over 8.7 days. Weather in February »

Weather in March

The transition to March sees the weather maintain its consistency. Despite the wind calming down to an average speed of 25.9km/h (16.1mph), the city witnesses a slight increase in rainfall at 14mm (0.55") over 10.6 days. Light rain showers coupled with a stable temperature range keep the climate pleasant. Weather in March »

Weather in April

April ushers in a distinct change in the climate, with rainfall volumes rising to 17mm (0.67") and stretching across 12.4 days. Yet, the sun holds strong, with 10.1 hours of sunshine adorning 13.8 days of the month. As the month progresses, the relative humidity starts creeping up, indicating the onset of a slightly muggier atmosphere. Weather in April »

Weather in May

May stands as the prelude to the upcoming heat of the summer season. With the high temperatures rising to reach 27.8°C (82°F) and the low temperatures maintaining at 26.9°C (80.4°F), the ambient temperature balance sways towards heat. Weather in May »

Weather in June

June heralds the summer season in full swing in Waterloo, as temperatures rise to 28.1°C (82.6°F). The increased heat is complemented by an equally significant escalation in rainfall. With scattered showers gracing the city, June takes on a tropical allure. Weather in June »

Weather in July

The balmy summer weather continues into July, with a mild increase in average temperatures. The rainfall peaks substantially at 30mm (1.18") across 16.4 days, confirming its position as the wettest month in Waterloo's calendar. However, this does not deter the sun from making its presence known. Weather in July »

Weather in August

In August, Waterloo experiences a slight dip in humidity while the temperatures and rainfall maintain their summery standards. The wind speed reduces to 22.5km/h (14mph) making the climate warmer and reducing the coastal breeze. Weather in August »

Weather in September

September in Waterloo sees a notable decrease in wind speed to 19.7km/h (12.2mph) and a drop in rainfall to 26mm (1.02") across 14.9 days. The weather finds a steady balance with the temperature hovering around the late 20s°C. Weather in September »

Weather in October

October signals the gradual transition from the summer season to milder weather conditions. Noteworthy in October is the increase in the rain patterns with the city receiving 37mm (1.46") rainfall over 16 days. The overall temperature remains stable, while wind speed picks pace to reach 21.1km/h (13.1mph) bringing in the occasional cool breeze. Weather in October »

Weather in November

As November sets in, Waterloo receives the highest quantity of rainfall for the year at 40mm (1.57") over 15.5 days. The temperature tends towards the cooler side with the onset of the city’s mild winter season. Coupled with this is a decrease in daylight hours, giving a sense of shorter days. Weather in November »

Weather in December

December in Waterloo witnesses a comfortable mix of mild winter temperatures and a reduction in rainfall to 23mm (0.91") across 14.9 days. The wind speed touches heights of 26.6km/h (16.5mph) making the weather cooler and fresher. Weather in December »