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    U.S. Virgin Islands

    Saint Thomas weather and climate

    U.S. Virgin Islands

    Saint Thomas weather and climate

    Day

    30 °C

    Night

    23 °C

    Sea

    27 °C

    Precipitation

    109 mm

    in month

    Rainy days

    11 days

    in month

    Daylight

    13 hours

    average

    Sunshine

    8 hours

    average

    Humidity

    76 %

    Weather charts for Saint Thomas

    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)15202530Precipitation (mm)0150
    Weather overview
    JanFebMarAprMayJunJulAugSepOctNovDecTemperature (° C)15202530Precipitation (mm)0150
    Wet days chart
    JanFebMarAprMayJunJulAugSepOctNovDecWet days4681012141646810121416
    Sunhours per day chart
    JanFebMarAprMayJunJulAugSepOctNovDecSunhours per day46810124681012
    Wind chart
    JanFebMarAprMayJunJulAugSepOctNovDecWind024682468
    Humidity chart
    JanFebMarAprMayJunJulAugSepOctNovDecHumidity %65707580856570758085
    Data backed by 40 years of history

    We make the most from 40 years of historical weather data to predict the best weather conditions.

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    Aerial view of mountain range in Saint Thomas in partly cloudy weather

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    Weather overview for Saint Thomas

    Weather overview

    Saint Thomas (U.S. Virgin Islands) in general has a tropical climate. Temperatures during the day are in the range from 27.8 °C (82.0 °F) in January to 31.1 °C (88.0 °F) in August. Temperatures during the night go from 20.9 °C (69.6 °F) in February to 23.9 °C (75.0 °F) in July. The highest sea temperatures in Saint Thomas are in September with 28.7 °C (83.6 °F) and the lowest in February with 25.9 °C (78.6 °F). The least rainy month in Saint Thomas is March with its 8 days of rain, the rainiest month is November, when it rains 14 days.

    January weather

    The day temperature is on its minimum in Saint Thomas, while the sea temperature continues to descent, its value is 26.2 °C (79.2 °F). The number of rainy days descents similarly to the previous month, with its value being 10 days, and the descent of the rainfall amount can be observed as well, its value is 67 mm (2.65 in). The night temperature continues to descent, with its value being 21.1 °C (70.0 °F). The number of sun hours (without clouds) rise's start could be observed, the value of this measure is 8 hours.

    February weather

    The minimum of the sea temperature is observable, with its value being 25.9 °C (78.6 °F) in Saint Thomas, and the night temperature is on its minimum as well in this month. The rainfall amount is on its minimum, its value is 43 mm (1.70 in), while the number of rainy days continues to descent, the value of this measure is 10 days. The number of sun hours (without clouds) continues to rise, with its value of 8 hours.

    March weather

    The number of rainy days reaches its minimum, with its value of 8 days in Saint Thomas, while the rainfall amount rise's start could be observed, its value is 50 mm (1.97 in). The number of sun hours (without clouds) reaches its maximum, with its value being 9 hours. The minimum of the humidity can be noticed in this month.

    April weather

    The beginning of the rise of the day temperature could be noticed in Saint Thomas, and the sea temperature rise's start could be observed too, with its value of 26.5 °C (79.7 °F). The number of rainy days starts to rise, while the rise of the rainfall amount can be observed, with its value of 77 mm (3.01 in). The night temperature starts to rise in this month.

    May weather

    The sea temperature rises similarly to the previous month, its value is 27.2 °C (81.0 °F) in Saint Thomas, and the rise of the day temperature can be observed too, the value of this measure is 29.6 °C (85.3 °F). The number of rainy days rises similarly to the previous month, the value of this measure is 11 days, and the rainfall amount continues to rise too, with its value being 109 mm (4.30 in). The rise of the night temperature can be observed, the value of this measure is 22.7 °C (72.9 °F). The number of sun hours (without clouds) starts to descent, the value of this measure is 8 hours.

    June weather

    The day temperature continues to rise, the value of this measure is 30.4 °C (86.7 °F) in Saint Thomas, and the rise of the sea temperature can be observed too, with its value being 27.8 °C (82.0 °F). The beginning of the descent of the number of rainy days could be noticed, with its value being 10 days, and the beginning of the descent of the rainfall amount could be noticed as well, with its value of 77 mm (3.05 in). The maximum of the day length is observable in this month. The night temperature rises similarly to the previous month, its value is 23.6 °C (74.5 °F).

    July weather

    The number of rainy days starts to rise, with its value being 12 days in Saint Thomas, and the beginning of the rise of the rainfall amount could be noticed as well, with its value of 88 mm (3.45 in). The beginning of the rise of the number of sun hours (without clouds) could be noticed in this month. The night temperature reaches its maximum, its value is 23.9 °C (75.0 °F). The wind speed is on its maximum, with its value being 4.8.

    August weather

    The number of rainy days continues to rise, its value is 12 days in Saint Thomas, and the rainfall amount rises similarly to the previous month too, the value of this measure is 101 mm (3.97 in). The maximum of the day temperature is observable, its value is 31.1 °C (88.0 °F).

    September weather

    The rise of the rainfall amount can be observed, the value of this measure is 119 mm (4.69 in) in Saint Thomas. The number of sun hours (without clouds) starts to descent, with its value being 8 hours. The maximum of the sea temperature is observable, its value is 28.7 °C (83.6 °F).

    October weather

    The number of rainy days starts to rise, its value is 13 days in Saint Thomas, while the rainfall amount continues to rise, the value of this measure is 130 mm (5.13 in). The wind speed is on its minimum in October. The maximum of the humidity can be noticed in this month.

    November weather

    The sea temperature starts to descent, the value of this measure is 28.0 °C (82.4 °F) in Saint Thomas, and the day temperature starts to descent too in this month. The maximum of the number of rainy days can be noticed, its value is 14 days, and the maximum of the rainfall amount is observable too, with its value of 134 mm (5.29 in). The night temperature starts to descent in this month. The minimum of the number of sun hours (without clouds) can be noticed, its value is 7 hours.

    December weather

    The descent of the sea temperature can be observed in Saint Thomas, and the day temperature continues to descent too, with its value being 28.2 °C (82.8 °F). The beginning of the descent of the number of rainy days could be noticed, with its value being 13 days, and the beginning of the descent of the rainfall amount could be noticed too in December. The night temperature descents similarly to the previous month, its value is 21.7 °C (71.1 °F). The day length is on its minimum, with its value of 11 hours.

    FAQs

    How many rainy days can I expect in Saint Thomas in January?

    In Saint Thomas in January, we can expect 10 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.4 days of the week, or in general - 34 % days.

    Is February part of the wet season in Saint Thomas?

    No, there is no wet season in February in Saint Thomas - you can expect 10 days of rain during the month.

    What temperature can I expect during the day in March in Saint Thomas?

    In March in Saint Thomas, the average daily temperatures will be 28.3 °C (82.9 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.

    Is it hot in Saint Thomas in April?

    In April in Saint Thomas, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.

    What is the sea temperature in Saint Thomas in May?

    The sea will reach 27.2 °C (81.0 °F) in May in Saint Thomas. Seems like an ideal temperature for swimming, you can stay in the sea for a long time and enjoy it as well.

    Is June a good month to visit Saint Thomas?

    In Saint Thomas in June, there are ideal conditions for a vacation. The daily temperatures in this month reach pleasant 30.4 °C (86.7 °F). The seawater temperature reaches ideal 27.8 °C (82.0 °F). At night, temperatures hover around a pleasant 23.6 °C (74.5 °F). There are only 10 days of rain in the whole month, so you can leave your umbrella at home.

    What is the air temperature in Saint Thomas in July at night?

    The average night temperature in July in Saint Thomas is 23.9 °C (75.0 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.

    How many hours of sun to expect in Saint Thomas in August?

    There is an average length of sunshine of 9 hours per day in Saint Thomas in August.

    How windy is Saint Thomas in September?

    An average wind scale that can be expected in September in Saint Thomas is 3.6.

    Is October part of the dry season in Saint Thomas?

    No, October is not a dry month in Saint Thomas, expect rain approximately 13 days in a month.

    What is the humidity in December in Saint Thomas?

    In December in Saint Thomas, expect humidity around 76 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.