AI-generatedSaint Thomas at a glance
- Best time
- Dec – Apr
- Warmest month
- Sep · 28°
- Warmest sea
- Sep · 29.1°
- Sunshine a year
- 3,050 h
- Rain a year
- 894 mm
- Climate
- Tropical
- Time zone
- UTC−4
- Elevation
- 6 m
Climate in Saint Thomas
Saint Thomas has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. September is the warmest month with average highs of 28 °C, while February is the coolest at 25 °C. With around 3,050 hours of sunshine a year, Saint Thomas is very sunny; April is the sunniest month with 9.0 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: December – April
October is the peak of the hurricane season
Keep in mindFrequent rainStorm season
A typical day in October
- Morning, 08:00: about 27°
- Midday, 13:00: about 28°
- Afternoon, 16:00: about 28°
- Evening, 20:00: about 27°
- Night, 23:00: about 27°
06:1317:58
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:59–06:42 · evening 17:29–18:11
- Blue hour
- Morning 05:51–05:59 · evening 18:11–18:20
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Saint Thomas in October?
In October, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 19 days, totalling 138 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Saint Thomas.
More details for October
- Daylight
- 11 h 45 min06:13 – 17:58
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−4America/St_Thomas
How the score comes together
- Temperatureweight 50 %88 %
- Sunshineweight 20 %85 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Sea temperature in Saint Thomas
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.6 – 29.5 °C
Swimming season: All year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Saint Thomas ranges from 26.3 °C in February to 29.1 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea temperature varies from year to year: in September, eight out of ten years were between 28.8 and 29.6 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 26.6° | 26.1° | 27.1° | warm |
| FebruaryFeb | 26.3° | 25.6° | 26.9° | warm |
| MarchMar | 26.3° | 25.6° | 26.8° | warm |
| AprilApr | 26.8° | 26.3° | 27.4° | warm |
| MayMay | 27.5° | 26.9° | 28.1° | warm |
| JuneJun | 28.1° | 27.5° | 28.7° | warm |
| JulyJul | 28.4° | 27.9° | 28.8° | warm |
| AugustAug | 28.8° | 28.3° | 29.3° | warm |
| SeptemberSep | 29.1° | 28.8° | 29.6° | very warm |
| OctoberOct | 29.1° | 28.6° | 29.5° | very warm |
| NovemberNov | 28.4° | 27.8° | 28.8° | warm |
| DecemberDec | 27.4° | 26.8° | 28.0° | warm |
Sunshine hours in Saint Thomas
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 8.1 of 11.8 hours of daylight in Saint Thomas, 69 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Saint Thomas
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 10 · very highStay in the shade around midday; SPF 50, clothing, hat and sunglasses.
The sun is strongest in May (UV 13).
Minutes until sunburn in October
- Very fair skin
- about 15 min
- Fair skin
- about 15 min
- Light brown skin
- about 25 min
- Olive skin
- about 30 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Saint Thomas: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Saint Thomas has about 19 rainy days with 138 mm of rain in total.
Wind and clouds in Saint Thomas
How breezy and how cloudy Saint Thomas is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Saint Thomas typically peaks at 26 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 56 % of the sky over Saint Thomas: variable cloud, with about 8.1 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Saint Thomas
How often the day gets hot in Saint Thomas (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Saint Thomas has about 0 hot days, with an average daytime high of 28 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Saint Thomas
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Hot 24° and more
- muggy month (10+ muggy days)
HotOctober: nights around 26°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in February (24°), the warmest in September (27°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) on about 357 days a year, mostly all year round.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 85 | 26° | 25° | 26.6° | 8.3 h | 10 | 30 |
| FebruaryFeb | 92 | 25° | 24° | 26.3° | 8.7 h | 7 | 24 |
| MarchMar | 94 | 26° | 24° | 26.3° | 8.9 h | 7 | 23 |
| AprilApr | 90 | 26° | 25° | 26.8° | 9.0 h | 9 | 41 |
| MayMay | 78 | 27° | 26° | 27.5° | 8.2 h | 13 | 72 |
| JuneJun | 76 | 28° | 26° | 28.1° | 8.3 h | 12 | 58 |
| JulyJul | 66 | 28° | 26° | 28.4° | 8.4 h | 17 | 86 |
| AugustAug | 61 | 28° | 27° | 28.8° | 8.5 h | 18 | 113 |
| SeptemberSep | 59 | 28° | 27° | 29.1° | 8.1 h | 18 | 135 |
| OctoberOct | 61 | 28° | 26° | 29.1° | 8.1 h | 19 | 138 |
| NovemberNov | 69 | 27° | 26° | 28.4° | 7.8 h | 16 | 124 |
| DecemberDec | 80 | 26° | 25° | 27.4° | 8.0 h | 12 | 48 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
18.34° N, 64.93° W · 6 m · America/St_Thomas
Best time to visit Saint Thomas
The best time to visit Saint Thomas is from December to April. For a beach holiday with the sea above 21 °C, go from December to April. For sightseeing, day trips and hiking, conditions are most comfortable from December to April. Rain is most frequent from May to December; the wettest month is October with 138 mm.
Saint Thomas through the seasons
How the weather changes over the seasons, with averages for each.
Saint Thomas in the dry season
Jan – Apr
Excellent
- 25–26 °C by day
- Sea 27 °C
- 9 h of sun a day
- 33 rainy days in all
Saint Thomas in the rainy season
May – Dec
Good
- 26–28 °C by day
- Sea 28 °C
- 8 h of sun a day
- 124 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Saint Thomas for you.
Your best months: February – April
Based on the climate averages; tap a month to see its details.
Compare two months in Saint Thomas
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
March has the better holiday weather in Saint Thomas: score 94 against 61. In March, days are 2 °C cooler than in October. The sea is 3 °C cooler in March. March has 12 fewer rainy days. The sun shines an hour longer a day in March.
| Month | October | March |
|---|---|---|
| Weather score | 61 | 94better |
| Day high | 28° | 26° |
| Night low | 26° | 24° |
| Sea | 29.1° | 26.3° |
| Sunshine | 8.1 h | 8.9 hbetter |
| Rainy days | 19 | 7better |
| Rainfall | 138 mm | 23 mmbetter |
| Muggy days | 31 | 29better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Dec – Apr
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Dec – Apr
15–28 °C and not too much rain
Rainy months
May – Dec
12 or more rainy days
Saint Thomas month by month
The typical weather for every month at a glance.
85January26° · Sea 27° · 8 h
In January, Saint Thomas is warm: daytime highs average 26 °C, and even at night it stays warm at around 25 °C. The sea averages 26.6 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 30 mm in total. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, January is an excellent month for a holiday in Saint Thomas.
Saint Thomas in January92February25° · Sea 26° · 9 h
In February, Saint Thomas is warm: daytime highs average 25 °C, and even at night it stays warm at around 24 °C. The sea averages 26.3 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain falls on about 7 days, adding up to 24 mm. The air is often humid and muggy. It is often windy, with gusts of around 31 km/h. All in all, February is an excellent month for a holiday in Saint Thomas.
Saint Thomas in February94March26° · Sea 26° · 9 h
In March, Saint Thomas is warm: daytime highs average 26 °C, and even at night it stays warm at around 24 °C. The sea averages 26.3 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. Rain falls on about 7 days, adding up to 23 mm. The air is often humid and muggy. It is often windy, with gusts of around 29 km/h. All in all, March is an excellent month for a holiday in Saint Thomas.
Saint Thomas in March90April26° · Sea 27° · 9 h
In April, Saint Thomas is warm: daytime highs average 26 °C, and even at night it stays warm at around 25 °C. The sea averages 26.8 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 9 days, adding up to 41 mm. The air is often humid and muggy. All in all, April is an excellent month for a holiday in Saint Thomas.
Saint Thomas in April78May27° · Sea 28° · 8 h
In May, Saint Thomas is warm: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 27.5 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 13 rainy days and 72 mm in total. The air is often humid and muggy. All in all, May is a good month for a holiday in Saint Thomas.
Saint Thomas in May76June28° · Sea 28° · 8 h
In June, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 28.1 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 58 mm in total. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, June is a good month for a holiday in Saint Thomas.
Saint Thomas in June66July28° · Sea 28° · 8 h
In July, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 28.4 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 17 days, totalling 86 mm. The air is often humid and muggy. It is often windy, with gusts of around 32 km/h. All in all, July is a good month for a holiday in Saint Thomas.
Saint Thomas in July61August28° · Sea 29° · 9 h
In August, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 27 °C. The sea averages 28.8 °C – lovely and warm for swimming. The sun shines for around 9 hours a day. It is the rainy season: rain falls on about 18 days, totalling 113 mm. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, August is a good month for a holiday in Saint Thomas.
Saint Thomas in August59September28° · Sea 29° · 8 h
In September, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 27 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 18 days, totalling 135 mm. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Saint Thomas.
Saint Thomas in September61October28° · Sea 29° · 8 h
In October, Saint Thomas is hot: daytime highs average 28 °C, and even at night it stays warm at around 26 °C. The sea averages 29.1 °C – almost as warm as a bath. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 19 days, totalling 138 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Saint Thomas.
Saint Thomas in October69November27° · Sea 28° · 8 h
In November, Saint Thomas is hot: daytime highs average 27 °C, and even at night it stays warm at around 26 °C. The sea averages 28.4 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 16 days, totalling 124 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Saint Thomas.
Saint Thomas in November80December26° · Sea 27° · 8 h
In December, Saint Thomas is warm: daytime highs average 26 °C, and even at night it stays warm at around 25 °C. The sea averages 27.4 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 48 mm in total. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, December is an excellent month for a holiday in Saint Thomas.
Saint Thomas in DecemberSaint Thomas compared
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Saint Thomas vs. Saint Croix
In October the holiday weather in Saint Thomas and Saint Croix is about equally good (score 61 vs. 60). During the day it is about as warm in Saint Croix as in Saint Thomas. The sea is about equally warm.
| in October | Saint Thomas | Saint Croix |
|---|---|---|
| Holiday score | 61 | 60 |
| Daytime high | 28° | 28° |
| Sea | 29° | 29° |
| Sunshine | 8 h | 8 h |
| Rainy days | 19 | 19 |
| Best time | Dec – Apr | Dec – Jun |
Through the year
U.S. Virgin Islands in October: the best places
In October, Saint Thomas ranks 2 of 2 destinations in this country.
- Saint Croix28°29°76
- 2Saint ThomasThis page28°29°61
Planning a trip to Saint Thomas
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Saint Thomas in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Saint Thomas has its best school-holiday weather during the Easter holidays (score 91) and its weakest during October half-term (score 61).
- 91
Easter holidays
Mar – Apr
ExcellentBest holidays
- 26 °C by day
- Sea 27 °C
- 9.0 h of sun a day
- 8 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 78
May half-term
May – Jun
Good
- 27 °C by day
- Sea 28 °C
- 8.2 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 63
Summer holidays
Jul – Aug
Good
- 28 °C by day
- Sea 29 °C
- 8.5 h of sun a day
- 17 rainy days a month
Keep in mind: Frequent rain, Storm season
- 61
October half-term
Oct
Good
- 28 °C by day
- Sea 29 °C
- 8.1 h of sun a day
- 19 rainy days a month
Keep in mind: Frequent rain, Storm season
- 83
Christmas holidays
Dec – Jan
Excellent
- 26 °C by day
- Sea 27 °C
- 8.2 h of sun a day
- 11 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 8 h 30 min
- Distance
- 6,660 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Saint Thomas lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about Saint Thomas
When is the best time to visit Saint Thomas?
The best time to visit Saint Thomas is from December to April. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Saint Thomas?
The sea temperature in Saint Thomas ranges from 26.3 °C in February to 29.1 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Saint Thomas in October?
Yes. In October the sea averages 29.1 °C – almost as warm as a bath.
What is the warmest month in Saint Thomas?
September is the warmest month, with average highs of 28 °C and nights around 27 °C. February is the coolest month at 25 °C.
When does it rain most in Saint Thomas?
Rain is most frequent from May to December; the wettest month is October with 138 mm. The driest month is March with 23 mm.
How many hours of sunshine does Saint Thomas get?
Saint Thomas gets around 3,050 hours of sunshine a year. The sunniest month is April with 9.0 hours a day; in November there are 7.8 hours a day.
What time zone is Saint Thomas in?
Saint Thomas uses the time zone America/St_Thomas, at UTC−4 all year.
How long is the flight from London to Saint Thomas?
A nonstop flight from London to Saint Thomas takes about 8 h 30 min, for a straight-line distance of about 6,660 km.
When is hurricane season in Saint Thomas?
Saint Thomas lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Saint Thomas?
Saint Thomas has its best school-holiday weather during the Easter holidays (score 91) and its weakest during October half-term (score 61). Holiday ratings (0–100): Easter holidays 91, May half-term 78, Summer holidays 63, October half-term 61, Christmas holidays 83.
Near Saint Thomas
Other destinations close by.
Places with a climate like Saint Thomas
Destinations whose weather through the year is closest to Saint Thomas's – good alternatives.