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Saint Thomas, US Virgin Islands · Tropical

Saint Thomas in July: go or not?

Mixed period. Saint Thomas in July: 5.3/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 18.34°N · 64.93°W
⚡ This month's verdict
Why not
Saint Thomas · July
5.3
27–28°
Temperature
48%
Rain
7h
Sun
🌴 Tropical☀️ High UV🌧️ Monsoon season
Photo : raghul ayyasamy via Unsplash
The month in detail

What to expect in July

Summer in Saint Thomas brings pleasant temperatures (28.0°F) and long sunny days (7.3h of sunshine). With 48.0% of rainy days, always have indoor alternatives planned.

July ranks 8 out of 12 months in Saint Thomas. Compared to June: 5 pts more rainy days, −0.5h of sun per day.

This month's conditions

What it's like in July

UV index
9 · very high
protection essential
Feels like
very humid
24°
Sea
29°C
warm, ideal
Daylight
13.0h of daylight
Air quality
good
AQI 34
Compare

Is July the right month?

The best month in Saint Thomas is March (8.3/10), 3.0 pts higher than July.

See March →See all 12 months →
Context

Our verdict

Saint Thomas, main island of the US Virgin Islands (USVI) in the Lesser Antilles : 50,000 inhabitants on 31 sq miles. Unincorporated US territory since 1917 (bought from Denmark for 25 million USD to prevent their seizure by Germany during the First World War), American citizens with US passports but without presidential voting rights.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Saint Thomas
Expedia →
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · Saint Thomas

GetYourGuide selection · free cancellation

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Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.

Country · US Virgin Islands

🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘVery expensive · 5/5

🌡️ Climate

🌍Climate typeTropical
📈Climate trend ⓘ+1.67°F/decade
🔥Hottest monthSeptember · 84°F
❄️Coolest monthJanuary · 79°F
🌧️Rainiest month ⓘOctober · 59%

🏝️ Tropical stay

🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore

Other destinations in July

If July doesn't convince you for this destination, compare with others.

Similar climate
Saint MartinSaint MartinSaint BarthélemySaint BarthélemyBasseterreSaint Kitts and NevisSan JuanPuerto RicoSaint LuciaSaint Lucia
Nearby
Puerto RicoPuerto Rico125 kmAntiguaAntigua and Barbuda353 kmPunta CanaDominican Republic367 kmGuadeloupeGuadeloupe428 km
Other top picks
Marsa AlamEgypt5.4Sharm el-SheikhEgypt5.1HurghadaEgypt5.5SantiagoChile4.5MalagaSpain6.6
← JuneAugust →
🗺️ See all 754 destinations on the map
Location

Where is Saint Thomas ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
US Virgin Islands
Tropical climate with a 8.3 → 5.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
18.34°N · 64.93°W
Questions

Frequently asked questions

What is the best time to visit Saint Thomas?
March is the best month with 79°F highs, 75°F lows, 7.5h of sunshine and 27.0% rainy days. The months of March & April offer comparable conditions.
How many hours of sunshine does Saint Thomas get in March?
Saint Thomas averages 7.5 sunshine hours per day in March. It is the sunniest month with a climate score of 7.8/10.
What is the rainiest month in Saint Thomas?
September is the most unfavourable month with September has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Saint Thomas in March?
In March, overnight lows reach 75°F, while afternoon highs average 79°F.
Is Saint Thomas good in winter?
In winter (December-February), Saint Thomas scores 7.4/10 on average — Acceptable conditions for cultural visits.. The best month overall remains March with a score of 7.8/10.
When should you avoid Saint Thomas?
September is the most difficult month to visit Saint Thomas, with September has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Saint Thomas in July?
In July, the sea averages 85°F in Saint Thomas: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Saint Thomas in July?
The average UV index reaches 9 in July in Saint Thomas (very high), with about 13.0h of daylight. Protection essential.