St John weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in St John in August. Check more long-term weather averages for St John in August before you book your next holiday to Virgin Islands in 2025/2026.

  • 31°C maximum daytime temperature in August in St John31
    31°C max day temperature
  • 9 hours of sunshine per day
  • 14 days with some rainfall in August in St John14
    14 days with some rainfall
  • 24°C minimum night-time temperature in August in St John24
    24°C min night temperature
  • 13 hours of daylight per day in August in St John13
    13 hours of daylight per day
  • High heat & humidity in August in St JohnH
    High heat & humidity
  • 124 mm monthly rainfall in August in St John124
    124 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in St John11
    11+ (Extreme) UV index
  • 28°C sea temperature in August in St John28
    28°C sea temperature

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The August weather guide for Virgin Islands (St John) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in St John in August?

Daytime temperatures usually reach 31°C in St John in August with high heat and humidity, falling to 24°C at night.

How sunny is it in St John in August?

There are normally 9 hours of bright sunshine each day in St John in August - that's 67% of daylight hours.

How warm is the sea around St John in August?

The average sea temperature around St John in August is 28°C.

Does it rain in St John in August?

There are usually 14 days with some rain in St John in August and the average monthly rainfall is 124mm.

What is the chance of a hurricane in St John in August?

On average less than 1 day in August in St John is likely to be affected by the passage of one or more tropical storms.

St John August sunrise & sunset times

Browse the sunrise and sunset times for St John in August 2025. Select a month to view St John sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:57 18:54
Saturday, 16th August 2025 06:01 18:45
Sunday, 31st August 2025 06:05 18:34

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